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Apx A_Air Quality Analysis Technical Memo Appendix A Air Quality Analysis Technical Memorandum Appendix A Air Quality Analysis Technical Memorandum Kimley»Horn Appendix A Air Quality Analysis Technical Memorandum Kimley»Horn Page 1 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 TECHNICAL MEMORANDUM To: City of Rosemead From: Olivia Chan, Kimley-Horn and Associates, Inc. Dharma Truong, Kimley-Horn and Associates, Inc. Date: December 15, 2025 Subject: 1515 Walnut Grove Avenue Project, Rosemead, CA – Air Quality Analysis Purpose The purpose of this memorandum is to assess the potential impacts due to air pollutant emissions associated with construction and operation of the 1515 Walnut Grove Avenue Project (Project or proposed Project), located in the City of Rosemead (City), California. Project Location The Project would be developed on approximately 9.28 acres (404,146 square feet) (Project Site). The Project Site is comprised of one parcel (Los Angeles County Assessor’s Parcel Number [APN] 5279- 027-001). The Project Site is currently developed with two vacant buildings built in 1982 that were operated by Southern California Edison (SCE). The Project Site includes a 249,701-sf office building; an 18,314-sf detached central plant building containing a chiller room, emergency generator room, break room, office, restroom, fan room, boiler room, transformer room, and cooling towers; and a surface parking lot. A sewer lift station is also located in the parking lot southwest of the office building. The office building and central plant are currently vacant; however, the cooling systems within the central plant remain functional, but not operational. There is minimal landscaping on the Project Site, limited to ornamental trees and shrubs. The Project Site is surrounded by office development, commercial uses, and surface parking to the north; Walnut Grove Avenue and the Whittier Narrows Golf Course to the east; surface parking and the University of the West to the south; and residential development to the west. Unincorporated areas of Los Angeles County (County) border the Project Site to the east of Walnut Grove Avenue and to the west along the Project Site’s western boundary. Please refer to Figure 1: Regional Vicinity Map and Figure 2: Aerial of Project Site and Surrounding Land Use Map. Regional vehicle access to the Project Site is provided by the State Route (SR) 60 and SR 164 (Rosemead Boulevard), located approximately 0.54 miles (2,894 feet) south and 1.04 miles (5,491 feet) east, respectively. Local vehicle access to the Project Site is provided via Rush Street, located approximately 0.20 miles (1,040 feet) north of the Project Site and Walnut Grove Avenue directly east of the Project Site. The Project Site is located in proximity to several transit options. The Project Site is located approximately 0.25 miles (1,342 feet) south of the Los Angeles County Metropolitan Transportation Authority (Metro) 287 bus stop. The Project Site is also served by the Montebello Transit 20 San Gabriel bus line, located approximately 0.33 miles (1,772 feet) to the south of the site. Kimley»Horn page1 TECHNICAL MEMORANDUM To: City of Rosemead From: Olivia Chan, Kimley-Horn and Associates, Inc. Dharma Truong, Kimley-Horn and Associates, Inc. Date: December 15, 2025 Subject: 1515 Walnut Grove Avenue Project, Rosemead, CA — Air Quality Analysis Purpose The purpose of this memorandum is to assess the potential impacts due to air pollutant emissions associated with construction and operation of the 1515 Walnut Grove Avenue Project (Project or proposed Project), located in the City of Rosemead (City), California. Project Location The Project would be developed on approximately 9.28 acres (404,146 square feet) (Project Site). The Project Site is comprised of one parcel (Los Angeles County Assessor's Parcel Number [APN] 5279- 027-001). The Project Site is currently developed with two vacant buildings built in 1982 that were operated by Southern California Edison (SCE). The Project Site includes a 249,701-sf office building; an 18,314-sf detached central plant building containing a chiller room, emergency generator room, break room, office, restroom, fan room, boiler room, transformer room, and cooling towers; and a surface parking lot. A sewer lift station is also located in the parking lot southwest of the office building. The office building and central plant are currently vacant; however, the cooling systems within the central plant remain functional, but not operational. There is minimal landscaping on the Project Site, limited to ornamental trees and shrubs. The Project Site is surrounded by office development, commercial uses, and surface parking to the north; Walnut Grove Avenue and the Whittier Narrows Golf Course to the east; surface parking and the University of the West to the south; and residential development to the west. Unincorporated areas of Los Angeles County (County) border the Project Site to the east of Walnut Grove Avenue and to the west along the Project Site’s western boundary. Please refer to Figure 1: Regional Vicinity Map and Figure 2: Aerial of Project Site and Surrounding Land Use Map. Regional vehicle access to the Project Site is provided by the State Route {SR} 60 and SR 164 (Rosemead Boulevard), located approximately 0.54 miles (2,894 feet) south and 1.04 miles (5,491 feet) east, respectively. Local vehicle access to the Project Site is provided via Rush Street, located approximately 0.20 miles (1,040 feet) north of the Project Site and Walnut Grove Avenue directly east of the Project Site. The Project Site is located in proximity to several transit options. The Project Site is located approximately 0.25 miles (1,342 feet) south of the Los Angeles County Metropolitan Transportation Authority (Metro) 287 bus stop. The Project Site is also served by the Montebello Transit 20 San Gabriel bus line, located approximately 0.33 miles (1,772 feet) to the south of the site. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page1 TECHNICAL MEMORANDUM To: City of Rosemead From: Olivia Chan, Kimley-Horn and Associates, Inc. Dharma Truong, Kimley-Horn and Associates, Inc. Date: December 15, 2025 Subject: 1515 Walnut Grove Avenue Project, Rosemead, CA — Air Quality Analysis Purpose The purpose of this memorandum is to assess the potential impacts due to air pollutant emissions associated with construction and operation of the 1515 Walnut Grove Avenue Project (Project or proposed Project), located in the City of Rosemead (City), California. Project Location The Project would be developed on approximately 9.28 acres (404,146 square feet) (Project Site). The Project Site is comprised of one parcel (Los Angeles County Assessor's Parcel Number [APN] 5279- 027-001). The Project Site is currently developed with two vacant buildings built in 1982 that were operated by Southern California Edison (SCE). The Project Site includes a 249,701-sf office building; an 18,314-sf detached central plant building containing a chiller room, emergency generator room, break room, office, restroom, fan room, boiler room, transformer room, and cooling towers; and a surface parking lot. A sewer lift station is also located in the parking lot southwest of the office building. The office building and central plant are currently vacant; however, the cooling systems within the central plant remain functional, but not operational. There is minimal landscaping on the Project Site, limited to ornamental trees and shrubs. The Project Site is surrounded by office development, commercial uses, and surface parking to the north; Walnut Grove Avenue and the Whittier Narrows Golf Course to the east; surface parking and the University of the West to the south; and residential development to the west. Unincorporated areas of Los Angeles County (County) border the Project Site to the east of Walnut Grove Avenue and to the west along the Project Site’s western boundary. Please refer to Figure 1: Regional Vicinity Map and Figure 2: Aerial of Project Site and Surrounding Land Use Map. Regional vehicle access to the Project Site is provided by the State Route {SR} 60 and SR 164 (Rosemead Boulevard), located approximately 0.54 miles (2,894 feet) south and 1.04 miles (5,491 feet) east, respectively. Local vehicle access to the Project Site is provided via Rush Street, located approximately 0.20 miles (1,040 feet) north of the Project Site and Walnut Grove Avenue directly east of the Project Site. The Project Site is located in proximity to several transit options. The Project Site is located approximately 0.25 miles (1,342 feet) south of the Los Angeles County Metropolitan Transportation Authority (Metro) 287 bus stop. The Project Site is also served by the Montebello Transit 20 San Gabriel bus line, located approximately 0.33 miles (1,772 feet) to the south of the site. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 SOURCE: ArcGIS Pro, 2025 FIGURE 1: Regional Vicinity Map 1515 WALNUT GROVE AVENUE PROJECT 6 6 Project Site 1 — PDIN San Gabriel la >1 ~- 2, pi) - -Alhambra ‘ wo Daa NO ge Tel 0% 2 7%ain St \ «£ E N «£ £ 5 I) as 5 <= 3 IS &- K 5 Ts °Vt ~ I = Lo rae + 2 Rosemead Soee — \ a » ye N ” \ Fy BASEN\ wn J ~ LI ) Go Ip =< = ,. > ® ~. ¢ El Monte -< % <<.) pl 2 S, EE ° (A f= ~/ 5 & 3 4, oF Jw El EN{Monterey Park £ f SN . “ / E ! " : . J ©LA / "~. . .southSan \ Aa A : 4 Gabriel ) h Whittier Narrows Natural Area IRr hn 1 PE Ean SOURCE: ArcGIS Pro, 2025 & FIGURE 1: Regional Vicinity Map 1515 WALNUT GROVE AVENUE PROJECT Kimley»Horn FIGURE 2-2: Aerial of Project Site and Surrounding Land Use Map ROSEMEAD CONDOS 1515 WALNUT GROVE AVENUE Yarrow StreetYarrow Street FIGURE 2: Aerial of Project Site and Surrounding Land Use Map 1515 WALNUT GROVE AVENUE PROJECT De l t a A v e n u e De l t a A v e n u e Yarrow StreetYarrow Street Wa l n u t G r o v e Wa l n u t G r o v e Sarah StreetSarah Street Alh a m b r a W a s h Alh a m b r a W a s h Walmart Panda Restaurant Group Institute of Chinese Buddhist Studies University of the West Whittier Narrows Golf Course Legend Los Angeles County Unincorporated Areas Project Site Surrounding Land Uses and Points of Interest City of Rosemead Se A. ’ Y Whittier Narrows Golf Course © U4" P Legend H [ahd Institute of Chines: Buddhist Studies &® FIGURE 2: Aerial of Project Site and Surrounding Land Use Map 1515 WALNUT GROVE AVENUE PROJECT Kimley»Horn Page 4 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Project Description The Project would demolish the existing structures and construct 27 buildings, including tandem townhomes (39 feet and 4 inches tall) and row townhomes (38 feet tall). Of the 27 buildings, 13 buildings would be dedicated to 83 tandem townhomes and 14 buildings would be dedicated to 108 row townhomes. The Project would comprise a total of 191 dwelling units. Each unit would include two garage spaces. The Project would provide 104 double-striped guest parking spaces. Additionally, the Project would provide public right of way improvements such as a 1,253 square foot of parkway and a 3,000 square foot improved sidewalk along Walnut Grove Avenue. The Project would provide 126,015 square foot of open space for residents, including 75,004 square foot of landscaping, 43,597 square foot of hardscape, 3,831 square foot of decomposed granite, 972 SF playground, 1,933 square foot pool, and 160 square foot spa. A dog park, bench seating, and picnic tables would be located in the northeast corner of the Project Site. On the southeast corner of the Project Site, the Project would include a bioretention basin and recreation center with a restroom facility, community pool, group spa, cabanas, gas barbeque grills, and a sundeck. A community garden with dwarf citrus trees would be located in the southwest corner of the Project Site. A central garden court with a shade structure, picnic tables, open lawn play area, and tot-lot with play equipment and rubber surfacing would be located between buildings 13, 14, 17, and 18. Project construction is anticipated to occur in one phase, lasting approximately 34 months, beginning as early as October 2026 and ending as early as August 2029. Project construction and architectural coating would occur over one phase. Construction would be consistent with the City of Rosemead Municipal Code (RMC) Chapter 8.36, including, without limitation, the City’s noise policies. Specifically, construction would be prohibited between the hours of 8 p.m. and 7 a.m. Monday through Saturday and prohibited on Sunday or any Federal holiday, in accordance with RMC Chapter 8.36.030, Exemptions. No nighttime construction activities are anticipated. Project Site preparation for the Project would require cutting and removal of approximately 22,457 tons of recycled concrete and 5,461 tons of recycled asphalt. Materials cut would remain on site and would not be hauled away. Approximately 7,500 cubic yards of import would be required. Environmental Setting Air Pollutants of Concern Air pollutants emitted into the ambient air by stationary and mobile sources are regulated by federal and State laws. These regulated air pollutants are known as “criteria pollutants” and include ozone (O3), nitrogen dioxide (NO2), carbon monoxide (CO), sulfur dioxide (SO2), coarse particulate matter (PM10), fine particulate matter (PM2.5), and lead. Criteria pollutants are categorized into primary and secondary air pollutants. Primary criteria pollutants are emitted directly from sources and include CO, reactive organic gases (ROG), nitrogen oxides (NOX), SO2, PM10, and PM2.5. Secondary criteria pollutants are formed through chemical and photochemical reactions in the atmosphere and include O3 and NO2.1 For example, O3 is formed by a chemical reaction between ROG and NOX in the presence 1 United States Environmental Protection Agency, Criteria Air Pollutants, https://www.epa.gov/criteria-air-pollutants. Accessed August 12, 2025. Kimley»Horn Page Project Description The Project would demolish the existing structures and construct 27 buildings, including tandem townhomes (39 feet and 4 inches tall) and row townhomes (38 feet tall). Of the 27 buildings, 13 buildings would be dedicated to 83 tandem townhomes and 14 buildings would be dedicated to 108 row townhomes. The Project would comprise a total of 191 dwelling units. Each unit would include two garage spaces. The Project would provide 104 double-striped guest parking spaces. Additionally, the Project would provide public right of way improvements such as a 1,253 square foot of parkway and a 3,000 square foot improved sidewalk along Walnut Grove Avenue. The Project would provide 126,015 square foot of open space for residents, including 75,004 square foot of landscaping, 43,597 square foot of hardscape, 3,831 square foot of decomposed granite, 972 SF playground, 1,933 square foot pool, and 160 square foot spa. A dog park, bench seating, and picnic tables would be located in the northeast corner of the Project Site. On the southeast corner of the Project Site, the Project would include a bioretention basin and recreation center with a restroom facility, community pool, group spa, cabanas, gas barbeque grills, and a sundeck. A community garden with dwarf citrus trees would be located in the southwest corner of the Project Site. A central garden court with a shade structure, picnic tables, open lawn play area, and tot-lot with play equipment and rubber surfacing would be located between buildings 13, 14, 17, and 18. Project construction is anticipated to occur in one phase, lasting approximately 34 months, beginning as early as October 2026 and ending as early as August 2029. Project construction and architectural coating would occur over one phase. Construction would be consistent with the City of Rosemead Municipal Code (RMC) Chapter 8.36, including, without limitation, the City’s noise policies. Specifically, construction would be prohibited between the hours of 8 p.m. and 7 a.m. Monday through Saturday and prohibited on Sunday or any Federal holiday, in accordance with RMC Chapter 8.36.030, Exemptions. No nighttime construction activities are anticipated. Project Site preparation for the Project would require cutting and removal of approximately 22,457 tons of recycled concrete and 5,461 tons of recycled asphalt. Materials cut would remain on site and would not be hauled away. Approximately 7,500 cubic yards of import would be required. Environmental Setting Air Pollutants of Concern Air pollutants emitted into the ambient air by stationary and mobile sources are regulated by federal and State laws. These regulated air pollutants are known as “criteria pollutants” and include ozone (0s), nitrogen dioxide (NO;), carbon monoxide (CO), sulfur dioxide (SO;), coarse particulate matter (PM10), fine particulate matter (PM2.5), and lead. Criteria pollutants are categorized into primary and secondary air pollutants. Primary criteria pollutants are emitted directly from sources and include CO, reactive organic gases (ROG), nitrogen oxides (NOx), SO;, PM10, and PM2.5. Secondary criteria pollutants are formed through chemical and photochemical reactions in the atmosphere and include 0; and NO,.! For example, Os is formed by a chemical reaction between ROG and NOx in the presence 1 United States Environmental Protection Agency, Criteria Air Pollutants, https://www.epa.gov/criteria-air-pollutants. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page Project Description The Project would demolish the existing structures and construct 27 buildings, including tandem townhomes (39 feet and 4 inches tall) and row townhomes (38 feet tall). Of the 27 buildings, 13 buildings would be dedicated to 83 tandem townhomes and 14 buildings would be dedicated to 108 row townhomes. The Project would comprise a total of 191 dwelling units. Each unit would include two garage spaces. The Project would provide 104 double-striped guest parking spaces. Additionally, the Project would provide public right of way improvements such as a 1,253 square foot of parkway and a 3,000 square foot improved sidewalk along Walnut Grove Avenue. The Project would provide 126,015 square foot of open space for residents, including 75,004 square foot of landscaping, 43,597 square foot of hardscape, 3,831 square foot of decomposed granite, 972 SF playground, 1,933 square foot pool, and 160 square foot spa. A dog park, bench seating, and picnic tables would be located in the northeast corner of the Project Site. On the southeast corner of the Project Site, the Project would include a bioretention basin and recreation center with a restroom facility, community pool, group spa, cabanas, gas barbeque grills, and a sundeck. A community garden with dwarf citrus trees would be located in the southwest corner of the Project Site. A central garden court with a shade structure, picnic tables, open lawn play area, and tot-lot with play equipment and rubber surfacing would be located between buildings 13, 14, 17, and 18. Project construction is anticipated to occur in one phase, lasting approximately 34 months, beginning as early as October 2026 and ending as early as August 2029. Project construction and architectural coating would occur over one phase. Construction would be consistent with the City of Rosemead Municipal Code (RMC) Chapter 8.36, including, without limitation, the City’s noise policies. Specifically, construction would be prohibited between the hours of 8 p.m. and 7 a.m. Monday through Saturday and prohibited on Sunday or any Federal holiday, in accordance with RMC Chapter 8.36.030, Exemptions. No nighttime construction activities are anticipated. Project Site preparation for the Project would require cutting and removal of approximately 22,457 tons of recycled concrete and 5,461 tons of recycled asphalt. Materials cut would remain on site and would not be hauled away. Approximately 7,500 cubic yards of import would be required. Environmental Setting Air Pollutants of Concern Air pollutants emitted into the ambient air by stationary and mobile sources are regulated by federal and State laws. These regulated air pollutants are known as “criteria pollutants” and include ozone (0s), nitrogen dioxide (NO;), carbon monoxide (CO), sulfur dioxide (SO;), coarse particulate matter (PM10), fine particulate matter (PM2.5), and lead. Criteria pollutants are categorized into primary and secondary air pollutants. Primary criteria pollutants are emitted directly from sources and include CO, reactive organic gases (ROG), nitrogen oxides (NOx), SO;, PM10, and PM2.5. Secondary criteria pollutants are formed through chemical and photochemical reactions in the atmosphere and include 0; and NO,.! For example, Os is formed by a chemical reaction between ROG and NOx in the presence 1 United States Environmental Protection Agency, Criteria Air Pollutants, https://www.epa.gov/criteria-air-pollutants. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 5 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 of sunlight. Table 1: Air Contaminants and Associated Public Health Concerns summarizes the sources and health effects commonly associated with criteria pollutants. Table 1: Air Contaminants and Associated Public Health Concerns Pollutant Major Man-Made Sources Human Health Effects Particulate Matter (PM10 and PM2.5) Power plants, steel mills, chemical plants, unpaved roads and parking lots, wood-burning stoves and fireplaces, automobiles and others. Increased respiratory symptoms, such as irritation of the airways, coughing, or difficulty breathing; asthma; chronic bronchitis; irregular heartbeat; nonfatal heart attacks; and premature death in people with heart or lung disease. Impairs visibility. Ozone (O3) Formed by a chemical reaction between reactive organic gases/volatile organic compounds (ROG or VOC)1 and nitrogen oxides (NOX) in the presence of sunlight. Motor vehicle exhaust industrial emissions, gasoline storage and transport, solvents, paints and landfills. Irritates and causes inflammation of the mucous membranes and lung airways; causes wheezing, coughing, and pain when inhaling deeply; decreases lung capacity; aggravates lung and heart problems. Damages plants; reduces crop yield. Sulfur Dioxide (SO2) A colorless gas formed when fuel containing sulfur is burned and when gasoline is extracted from oil. Examples are petroleum refineries, cement manufacturing, metal processing facilities, locomotives, and ships. Respiratory irritant. Aggravates lung and heart problems. In the presence of moisture and oxygen, sulfur dioxide converts to sulfuric acid which can damage marble, iron and steel. Damages crops and natural vegetation. Impairs visibility. Precursor to acid rain. Carbon Monoxide (CO) An odorless, colorless gas formed when carbon in fuel is not burned completely; a component of motor vehicle exhaust. Reduces the ability of blood to deliver oxygen to vital tissues, affecting the cardiovascular and nervous system. Impairs vision, causes dizziness, and can lead to unconsciousness or death. Nitrogen Dioxide (NO2) A reddish-brown gas formed during fuel combustion for motor vehicles and industrial sources. Sources include motor vehicles, electric utilities, and other sources that burn fuel. Respiratory irritant; aggravates lung and heart problems. Precursor to O3. Contributes to global warming and nutrient overloading which deteriorates water quality. Causes brown discoloration of the atmosphere. 1. Volatile Organic Compounds (VOCs or Reactive Organic Gases [ROG]) are hydrocarbons/organic gases that are formed solely of hydrogen and carbon. There are several subsets of organic gases including ROGs and VOCs. Both ROGs and VOCs are emitted from the incomplete combustion of hydrocarbons or other carbon-based fuels. The major sources of hydrocarbons are combustion engine exhaust, oil refineries, and oil-fueled power plants; other common sources are petroleum fuels, solvents, dry cleaning solutions, and Kimley»Horn Page 5 of sunlight. Table 1: Air Contaminants and Associated Public Health Concerns summarizes the sources and health effects commonly associated with criteria pollutants. Table 1: Air Contaminants and Associated Public Health Concerns L Pollutant Major Man-Made Sources Human Health Effects GN Particulate Matter (PM10 and PM2.5) Power plants, steel mills, chemical plants, unpaved roads and parking lots, wood-burning stoves and fireplaces, automobiles and others. Increased respiratory symptoms, such as irritation of the airways, coughing, or difficulty breathing; asthma; chronic bronchitis; irregular heartbeat; nonfatal heart attacks; and premature death in people with heart or lung disease. Impairs visibility. Ozone (03)Formed by a chemical reaction between reactive organic gases/volatile organic compounds (ROG or VOC)! and nitrogen oxides (NOx) in the presence of sunlight. Motor vehicle exhaust industrial emissions, gasoline storage and transport, solvents, paints and landfills. Irritates and causes inflammation of the mucous membranes and lung airways; causes wheezing, coughing, and pain when inhaling deeply; decreases lung capacity; aggravates lung and heart problems. Damages plants; reduces crop yield. Sulfur Dioxide (SO,)A colorless gas formed when fuel containing sulfur is burned and when gasoline is extracted from oil. Examples are petroleum refineries, cement manufacturing, metal processing facilities, locomotives, and ships. Respiratory irritant. Aggravates lung and heart problems. In the presence of moisture and oxygen, sulfur dioxide converts to sulfuric acid which can damage marble, iron and steel. Damages crops and natural vegetation. Impairs visibility. Precursor to acid rain. Carbon Monoxide (CO)An odorless, colorless gas formed when carbon in fuel is not burned completely; a component of motor vehicle exhaust. Reduces the ability of blood to deliver oxygen to vital tissues, affecting the cardiovascular and nervous system. Impairs vision, causes dizziness, and can lead to unconsciousness or death. Nitrogen Dioxide (NO,)A reddish-brown gas formed during fuel combustion for motor vehicles and industrial sources. Sources include motor vehicles, electric utilities, and other sources that burn fuel. Respiratory irritant; aggravates lung and heart problems. Precursor to Oz. Contributes to global warming and nutrient overloading which deteriorates water quality. Causes brown discoloration of the atmosphere. 1. Volatile Organic Compounds (VOCs or Reactive Organic Gases [ROG]) are hydrocarbons/organic gases that are formed solely of hydrogen and carbon. There are several subsets of organic gases including ROGs and VOCs. Both ROGs and VOCs are emitted from the incomplete combustion of hydrocarbons or other carbon-based fuels. The major sources of hydrocarbons are combustion engine exhaust, oil refineries, and oil-fueled power plants; other common sources are petroleum fuels, solvents, dry cleaning solutions, and kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page 5 of sunlight. Table 1: Air Contaminants and Associated Public Health Concerns summarizes the sources and health effects commonly associated with criteria pollutants. Table 1: Air Contaminants and Associated Public Health Concerns L Pollutant Major Man-Made Sources Human Health Effects GN Particulate Matter (PM10 and PM2.5) Power plants, steel mills, chemical plants, unpaved roads and parking lots, wood-burning stoves and fireplaces, automobiles and others. Increased respiratory symptoms, such as irritation of the airways, coughing, or difficulty breathing; asthma; chronic bronchitis; irregular heartbeat; nonfatal heart attacks; and premature death in people with heart or lung disease. Impairs visibility. Ozone (03)Formed by a chemical reaction between reactive organic gases/volatile organic compounds (ROG or VOC)! and nitrogen oxides (NOx) in the presence of sunlight. Motor vehicle exhaust industrial emissions, gasoline storage and transport, solvents, paints and landfills. Irritates and causes inflammation of the mucous membranes and lung airways; causes wheezing, coughing, and pain when inhaling deeply; decreases lung capacity; aggravates lung and heart problems. Damages plants; reduces crop yield. Sulfur Dioxide (SO,)A colorless gas formed when fuel containing sulfur is burned and when gasoline is extracted from oil. Examples are petroleum refineries, cement manufacturing, metal processing facilities, locomotives, and ships. Respiratory irritant. Aggravates lung and heart problems. In the presence of moisture and oxygen, sulfur dioxide converts to sulfuric acid which can damage marble, iron and steel. Damages crops and natural vegetation. Impairs visibility. Precursor to acid rain. Carbon Monoxide (CO)An odorless, colorless gas formed when carbon in fuel is not burned completely; a component of motor vehicle exhaust. Reduces the ability of blood to deliver oxygen to vital tissues, affecting the cardiovascular and nervous system. Impairs vision, causes dizziness, and can lead to unconsciousness or death. Nitrogen Dioxide (NO,)A reddish-brown gas formed during fuel combustion for motor vehicles and industrial sources. Sources include motor vehicles, electric utilities, and other sources that burn fuel. Respiratory irritant; aggravates lung and heart problems. Precursor to Oz. Contributes to global warming and nutrient overloading which deteriorates water quality. Causes brown discoloration of the atmosphere. 1. Volatile Organic Compounds (VOCs or Reactive Organic Gases [ROG]) are hydrocarbons/organic gases that are formed solely of hydrogen and carbon. There are several subsets of organic gases including ROGs and VOCs. Both ROGs and VOCs are emitted from the incomplete combustion of hydrocarbons or other carbon-based fuels. The major sources of hydrocarbons are combustion engine exhaust, oil refineries, and oil-fueled power plants; other common sources are petroleum fuels, solvents, dry cleaning solutions, and kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 6 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Table 1: Air Contaminants and Associated Public Health Concerns Pollutant Major Man-Made Sources Human Health Effects paint (via evaporation). Source: United States Environmental Protection Agency, Criteria Air Pollutants, https://www.epa.gov/criteria-air-pollutants. Accessed August 12, 2025. Local Air Quality The Project Site is located within the South Coast Air Basin (SoCAB), which is a distinct geographic subarea within South Coast Air Management District’s (SCAQMD) jurisdiction. The SCAQMD maintains a network of air quality monitoring stations located throughout the SoCAB to measure ambient pollutant concentrations. The Project Site is located in Source Receptor Area (SRA) 11; therefore, the South San Gabriel Valley Monitoring Station located approximately 2.6 miles to the southeast of the Project Site is the monitoring station most representative of the Project Site. The criteria pollutants monitored at this station include O3, NO2, CO, PM2.5, and lead. The Central LA Monitoring Station located approximately 8.4 miles northeast of the Project Site, was used to report data for SO2 and PM10. Table 2: Ambient Air Quality Data provides the most recent local air quality data from 2022 to 2024, including the monitored maximum concentrations and annual exceedances of the California Ambient Air Quality Standards (CAAQS) or National Ambient Air Quality Standards (NAAQS). Table 2: Ambient Air Quality Data Pollutant/Standard1,2 2022 2023 2024 O3 (1-hour) Maximum Concentration (ppm) Days > CAAQS (0.09 ppm) O3 (8-hour) Maximum Concentration (ppm) 4th High 8-hour Concentration (ppm) Days > CAAQS (0.070 ppm) Days > NAAQS (0.070 ppm) 0.123 3 0.091 0.070 3 2 0.120 7 0.090 0.075 9 7 0.145 10 0.093 0.080 12 12 NO2 (1-hour) Maximum Concentration (ppm) 98th Percentile Concentration (ppm) NO2 (Annual) Annual Arithmetic Mean (ppm) 0.065 0.054 0.017 0.058 0.050 0.015 0.062 0.048 0.016 CO (1-hour) Maximum Concentration (ppm) CO (8-hour) Maximum Concentration (ppm) 1.6 1.5 1.8 1.3 1.9 1.5 SO2 (1-hour) Maximum Concentration (ppm) 99th Percentile Concentration (ppm) 0.006 0.004 0.008 0.002 0.002 0.002 PM10 (24-hour) Maximum Concentration (µg/m3) 60 57 77 Kimley»Horn Pages Table 1: Air Contaminants and Associated Public Health Concerns ollutant Major Man-Made Sources | Human Health effec paint (via evaporation). Source: United States Environmental Protection Agency, Criteria Air Pollutants, https://www.epa.gov/criteria-air-pollutants. Accessed August 12, 2025. Local Air Quality The Project Site is located within the South Coast Air Basin {SoCAB), which is a distinct geographic subarea within South Coast Air Management District's (SCAQMD) jurisdiction. The SCAQMD maintains a network of air quality monitoring stations located throughout the SoCAB to measure ambient pollutant concentrations. The Project Site is located in Source Receptor Area (SRA) 11; therefore, the South San Gabriel Valley Monitoring Station located approximately 2.6 miles to the southeast of the Project Site is the monitoring station most representative of the Project Site. The criteria pollutants monitored at this station include Os, NO,;, CO, PM2.5, and lead. The Central LA Monitoring Station located approximately 8.4 miles northeast of the Project Site, was used to report data for SO, and PM10. Table 2: Ambient Air Quality Data provides the most recent local air quality data from 2022 to 2024, including the monitored maximum concentrations and annual exceedances of the California Ambient Air Quality Standards (CAAQS) or National Ambient Air Quality Standards (NAAQS). Table 2: Ambient Air Quality Data Pollutant/Standard™> eed 2022 2023 0; (1-hour) Maximum Concentration (ppm) 0.123 0.120 0.145 Days > CAAQS (0.09 ppm) 3 7 10 Os (8-hour) Maximum Concentration (ppm) 0.091 0.090 0.093 4™ High 8-hour Concentration (ppm) 0.070 0.075 0.080 Days > CAAQS (0.070 ppm) 3 9 12 Days > NAAQS (0.070 ppm) 2 7 12 NO; (1-hour) Maximum Concentration (ppm) 0.065 0.058 0.062 98" Percentile Concentration (ppm) 0.054 0.050 0.048 NO; (Annual) Annual Arithmetic Mean (ppm) 0.017 0.015 0.016 CO (1-hour) Maximum Concentration (ppm) 1.6 1.8 1.9 CO (8-hour) Maximum Concentration (ppm) 1.5 1.3 1.5 SO; (1-hour) Maximum Concentration (ppm) 0.006 0.008 0.002 99 percentile Concentration (ppm) 0.004 0.002 0.002 PM10 (24-hour) Maximum Concentration (pug/m?3) 60 57 77 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Pages Table 1: Air Contaminants and Associated Public Health Concerns ollutant Major Man-Made Sources | Human Health effec paint (via evaporation). Source: United States Environmental Protection Agency, Criteria Air Pollutants, https://www.epa.gov/criteria-air-pollutants. Accessed August 12, 2025. Local Air Quality The Project Site is located within the South Coast Air Basin {SoCAB), which is a distinct geographic subarea within South Coast Air Management District's (SCAQMD) jurisdiction. The SCAQMD maintains a network of air quality monitoring stations located throughout the SoCAB to measure ambient pollutant concentrations. The Project Site is located in Source Receptor Area (SRA) 11; therefore, the South San Gabriel Valley Monitoring Station located approximately 2.6 miles to the southeast of the Project Site is the monitoring station most representative of the Project Site. The criteria pollutants monitored at this station include Os, NO,;, CO, PM2.5, and lead. The Central LA Monitoring Station located approximately 8.4 miles northeast of the Project Site, was used to report data for SO, and PM10. Table 2: Ambient Air Quality Data provides the most recent local air quality data from 2022 to 2024, including the monitored maximum concentrations and annual exceedances of the California Ambient Air Quality Standards (CAAQS) or National Ambient Air Quality Standards (NAAQS). Table 2: Ambient Air Quality Data Pollutant/Standard™> eed 2022 2023 0; (1-hour) Maximum Concentration (ppm) 0.123 0.120 0.145 Days > CAAQS (0.09 ppm) 3 7 10 Os (8-hour) Maximum Concentration (ppm) 0.091 0.090 0.093 4™ High 8-hour Concentration (ppm) 0.070 0.075 0.080 Days > CAAQS (0.070 ppm) 3 9 12 Days > NAAQS (0.070 ppm) 2 7 12 NO; (1-hour) Maximum Concentration (ppm) 0.065 0.058 0.062 98" Percentile Concentration (ppm) 0.054 0.050 0.048 NO; (Annual) Annual Arithmetic Mean (ppm) 0.017 0.015 0.016 CO (1-hour) Maximum Concentration (ppm) 1.6 1.8 1.9 CO (8-hour) Maximum Concentration (ppm) 1.5 1.3 1.5 SO; (1-hour) Maximum Concentration (ppm) 0.006 0.008 0.002 99 percentile Concentration (ppm) 0.004 0.002 0.002 PM10 (24-hour) Maximum Concentration (pug/m?3) 60 57 77 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 7 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Table 2: Ambient Air Quality Data Pollutant/Standard1,2 2022 2023 2024 Days > CAAQS (50 µg/m3) Days > NAAQS (150 µg/m3) PM10 (Annual Average)3 Annual Arithmetic Mean (20 µg/m3) 4 0 28.9 2 0 24.3 10 0 25.4 PM2.5 (24-hour) Maximum Concentration (µg/m3) 98th Percentile Concentration (µg/m3) Days > NAAQS (35 µg/m3) PM2.5 (Annual Average)4 Annual Arithmetic Mean (12 µg/m3) 53.8 25.6 1 11.32 33.2 23.8 0 10.01 61.7 34.6 2 12.10 Lead Maximum 30-day average (ug/m3) 0.007 0.007 0.013 O3 = ozone; NO2 = nitrogen dioxide; CO = carbon monoxide; SO2 = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter; CAAQS = California Ambient Air Quality Standards; NAAQS = National Ambient Air Quality Standards; ppm = parts per million; µg/m3 = micrograms per cubic meter 1. Measurements for O3, NO2, CO, PM2.5, and lead were taken at the South San Gabriel Valley Monitoring Station located at 4144 San Gabriel River Parkway, Pico Rivera, California 90660 (CARB #70185). Measurements for SO2 and PM10 were taken at the Central LA Monitoring Station located at 1630 North Main Street, Los Angeles, CA 90012 (CARB #70087). 2. The CAAQS are based on a not to exceed standard. The NAAQS are based on a 3-year average of the annual 4th highest daily maximum 8-hour concentration for O3; 98th percentile of 1-hour daily maximum concentrations averaged over 3 years for 1-hr NO2; and not to be exceeded more than once per year on average over 3 years for 24-hr PM. 3. State annual average PM10 standard is > 20 µg/m3. Federal annual PM10 standard (> 50 µg/m3) was revoked in 2006. 4. Both Federal and State standards are annual average > 12.0 µg/m3. Source: South Coast Air Management District, Historical Data by Year, www.aqmd.gov/home/air-quality/air-quality-data-studies/ historical-data-by-year. Accessed August 12, 2025. Sensitive Receptors Sensitive populations are more susceptible to the effects of air pollution than the general population. Sensitive receptors are locations where sensitive populations congregate. Therefore, sensitive receptors that are in proximity to localized sources of toxics are of particular concern. Land uses considered sensitive receptors include residences, schools, daycare centers, parks and playgrounds, or hospitals.2 Sensitive receptors nearest the Project Site are residential uses adjacent to the west and institutional use (University of the West) adjacent to the south. Regulatory Setting Federal Federal Clean Air Act The Federal Clean Air Act (FCAA; 42 United States Code §§ 7401 et seq.) and its amendments regulate air pollutant emissions federally. Under the FCAA, the United States Environmental Protection Agency (U.S. EPA) developed the NAAQS for criteria pollutants and designates areas as either attainment or nonattainment for each criteria pollutant based on whether the NAAQS have been achieved. 2 California Air Resources Board, Sensitive Receptor Assessment, https://ww2.arb.ca.gov/capp/cst/rdi/sensitive-receptor-assessment. Accessed September 16, 2025. Kimley»Horn page7 prble 2: Ambient Air Quality Data ollutant/Standard!? Days > CAAQS (50 pug/m?®) 4 2 10 Days > NAAQS (150 pg/m?3) 0 0 0 PM10 (Annual Average)? Annual Arithmetic Mean (20 pg/m?3) 28.9 24.3 25.4 PM2.5 (24-hour) Maximum Concentration (pug/m?3) 53.8 33.2 61.7 98" Percentile Concentration {(pg/m?3) 25.6 23.8 34.6 Days > NAAQS (35 pg/m?) 1 0 2 PM2.5 (Annual Average)? Annual Arithmetic Mean (12 pg/m?3) 11.32 10.01 12.10 Lead Maximum 30-day average {(ug/m3) 0.007 0.007 0.013 Os = ozone; NO; = nitrogen dioxide; CO = carbon monoxide; SO: = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter; CAAQS = California Ambient Air Quality Standards; NAAQS = National Ambient Air Quality Standards; ppm = parts per million; ug/m3 = micrograms per cubic meter 1. Measurements for Os, NO3, CO, PM2.5, and lead were taken at the South San Gabriel Valley Monitoring Station located at 4144 San Gabriel River Parkway, Pico Rivera, California 90660 (CARB #70185). Measurements for SO2 and PM10 were taken at the Central LA Monitoring Station located at 1630 North Main Street, Los Angeles, CA 90012 (CARB #70087). 2. The CAAQS are based on a not to exceed standard. The NAAQS are based on a 3-year average of the annual 4" highest daily maximum 8-hour concentration for Os; 98" percentile of 1-hour daily maximum concentrations averaged over 3 years for 1-hr NO2; and not to be exceeded more than once per year on average over 3 years for 24-hr PM. 3. State annual average PM10 standard is > 20 pg/m?3. Federal annual PM10 standard (> 50 pg/m?) was revoked in 2006. 4. Both Federal and State standards are annual average > 12.0 pg/m?3. Source: South Coast Air Management District, Historical Data by Year, www.agmd.gov/home/air-quality/air-quality-data-studies/ historical-data-by-year. Accessed August 12, 2025. Sensitive Receptors Sensitive populations are more susceptible to the effects of air pollution than the general population. Sensitive receptors are locations where sensitive populations congregate. Therefore, sensitive receptors that are in proximity to localized sources of toxics are of particular concern. Land uses considered sensitive receptors include residences, schools, daycare centers, parks and playgrounds, or hospitals. Sensitive receptors nearest the Project Site are residential uses adjacent to the west and institutional use (University of the West) adjacent to the south. Regulatory Setting Federal Federal Clean Air Act The Federal Clean Air Act (FCAA; 42 United States Code §§ 7401 et seq.) and its amendments regulate air pollutant emissions federally. Under the FCAA, the United States Environmental Protection Agency (U.S. EPA) developed the NAAQS for criteria pollutants and designates areas as either attainment or nonattainment for each criteria pollutant based on whether the NAAQS have been achieved. 2 California Air Resources Board, Sensitive Receptor Assessment, https://ww2.arb.ca.gov/capp/cst/rdi/sensitive-receptor-assessment. Accessed September 16, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page7 prble 2: Ambient Air Quality Data ollutant/Standard!? Days > CAAQS (50 pug/m?®) 4 2 10 Days > NAAQS (150 pg/m?3) 0 0 0 PM10 (Annual Average)? Annual Arithmetic Mean (20 pg/m?3) 28.9 24.3 25.4 PM2.5 (24-hour) Maximum Concentration (pug/m?3) 53.8 33.2 61.7 98" Percentile Concentration {(pg/m?3) 25.6 23.8 34.6 Days > NAAQS (35 pg/m?) 1 0 2 PM2.5 (Annual Average)? Annual Arithmetic Mean (12 pg/m?3) 11.32 10.01 12.10 Lead Maximum 30-day average {(ug/m3) 0.007 0.007 0.013 Os = ozone; NO; = nitrogen dioxide; CO = carbon monoxide; SO: = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter; CAAQS = California Ambient Air Quality Standards; NAAQS = National Ambient Air Quality Standards; ppm = parts per million; ug/m3 = micrograms per cubic meter 1. Measurements for Os, NO3, CO, PM2.5, and lead were taken at the South San Gabriel Valley Monitoring Station located at 4144 San Gabriel River Parkway, Pico Rivera, California 90660 (CARB #70185). Measurements for SO2 and PM10 were taken at the Central LA Monitoring Station located at 1630 North Main Street, Los Angeles, CA 90012 (CARB #70087). 2. The CAAQS are based on a not to exceed standard. The NAAQS are based on a 3-year average of the annual 4" highest daily maximum 8-hour concentration for Os; 98" percentile of 1-hour daily maximum concentrations averaged over 3 years for 1-hr NO2; and not to be exceeded more than once per year on average over 3 years for 24-hr PM. 3. State annual average PM10 standard is > 20 pg/m?3. Federal annual PM10 standard (> 50 pg/m?) was revoked in 2006. 4. Both Federal and State standards are annual average > 12.0 pg/m?3. Source: South Coast Air Management District, Historical Data by Year, www.agmd.gov/home/air-quality/air-quality-data-studies/ historical-data-by-year. Accessed August 12, 2025. Sensitive Receptors Sensitive populations are more susceptible to the effects of air pollution than the general population. Sensitive receptors are locations where sensitive populations congregate. Therefore, sensitive receptors that are in proximity to localized sources of toxics are of particular concern. Land uses considered sensitive receptors include residences, schools, daycare centers, parks and playgrounds, or hospitals. Sensitive receptors nearest the Project Site are residential uses adjacent to the west and institutional use (University of the West) adjacent to the south. Regulatory Setting Federal Federal Clean Air Act The Federal Clean Air Act (FCAA; 42 United States Code §§ 7401 et seq.) and its amendments regulate air pollutant emissions federally. Under the FCAA, the United States Environmental Protection Agency (U.S. EPA) developed the NAAQS for criteria pollutants and designates areas as either attainment or nonattainment for each criteria pollutant based on whether the NAAQS have been achieved. 2 California Air Resources Board, Sensitive Receptor Assessment, https://ww2.arb.ca.gov/capp/cst/rdi/sensitive-receptor-assessment. Accessed September 16, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 8 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Proposed projects in or near nonattainment areas could be subject to more stringent air-permitting requirements. As part of its enforcement responsibilities, the U.S. EPA requires each state with nonattainment areas to prepare and submit a State Implementation Plan that demonstrates the means to attain the NAAQS within the federally imposed deadlines. The State Implementation Plan must integrate federal, state, and local plan components and regulations to identify specific measures to reduce pollution in nonattainment areas, using a combination of performance standards and market-based programs. The U.S. EPA can withhold certain transportation funds from states that fail to comply with the planning requirements of the FCAA. If a State fails to correct these planning deficiencies within two years of Federal notification, the U.S. EPA is required to develop a federal implementation plan for the identified nonattainment area or areas. The provisions of 40 Code of Federal Regulations (CFR) Parts 51 and 93 apply in all nonattainment and maintenance areas for transportation-related criteria pollutants for which the area is designated nonattainment or has a maintenance plan. Applicable federal standards are summarized in Table 3: State and Federal Ambient Air Quality Standards. Table 3: State and Federal Ambient Air Quality Standards Pollutant Averaging Time State Standards1,2 Federal Standards3,4,5 Ozone (O3)6 1 Hour 0.09 ppm (180 µg/m3) NA 8 Hour 0.070 ppm (137 µg/m3) 0.070 ppm (137 µg/m3) Respirable Particulate Matter (PM10)7 24-Hour 50 µg/m3 150 µg/m3 Annual Arithmetic Mean 20 µg/m3 NA Fine Particulate Matter (PM2.5)7 24-Hour NA 35 µg/m3 Annual Arithmetic Mean 12 µg/m3 9.0 µg/m3 Carbon Monoxide (CO) 1 Hour 20 ppm (23 mg/m3) 35 ppm (40 mg/m3) 8 Hour 9.0 ppm (10 mg/m3) 9.0 ppm (10 mg/m3) Nitrogen Dioxide (NO2)8 1 Hour 0.18 ppm (339 µg/m3) 100 ppb (188 µg/m3) Annual Arithmetic Mean 0.030 ppm (57 µg/m3) 0.053 ppm (100 µg/m3) Sulfur Dioxide (SO2)9 1 Hour 0.25 ppm (655 µg/m3) 75 ppb (196 µg/m3) 24 Hour 0.04 ppm (105 µg/m3) 0.14 ppm (365 µg/m3) Annual Arithmetic Mean NA 0.03 ppm (80 µg/m3) Lead (Pb)10,11 30-Day Average 1.5 µg/m3 NA Calendar Quarter NA 1.5 µg/m3 Rolling 3-Month Average NA 0.15 µg/m3 Visibility Reducing Particles12 8 hours See Note 11 NA Sulfates (SO4-2) 24 Hour 25 µg/m3 NA Hydrogen Sulfide (H2S) 1 Hour 0.03 ppm (42 µg/m3) NA Vinyl Chloride (C2H3CI)10 24 Hour 0.01 ppm (26 µg/m3) NA ppm = parts per million; µg/m3 = micrograms per cubic meter; mg/m3 = milligrams per cubic meter; NA = no information available. 1. California standards for O3, CO (except Lake Tahoe), SO2 (1-hour and 24-hour), NO2, suspended particulate matter (PM10, PM2.5, and visibility reducing particles), are values that are not to be exceeded. All others are not to be equaled or exceeded. CAAQS are listed in the Table of Standards in Section 70200 of Title 17 of the California Code of Regulations. 2. Concentration expressed first in units in which it was promulgated. Equivalent units given in parentheses are based upon a reference temperature of 25° C and a reference pressure of 760 torr. Most measurements of air quality are to be corrected to a reference temperature of 25° C and a reference pressure of 760 torr; ppm in this table refers to ppm by volume, or micromoles of pollutant per Page 8Kimley»Horn Proposed projects in or near nonattainment areas could be subject to more stringent air-permitting requirements. As part of its enforcement responsibilities, the U.S. EPA requires each state with nonattainment areas to prepare and submit a State Implementation Plan that demonstrates the means to attain the NAAQS within the federally imposed deadlines. The State Implementation Plan must integrate federal, state, and local plan components and regulations to identify specific measures to reduce pollution in nonattainment areas, using a combination of performance standards and market-based programs. The U.S. EPA can withhold certain transportation funds from states that fail to comply with the planning requirements of the FCAA. If a State fails to correct these planning deficiencies within two years of Federal notification, the U.S. EPA is required to develop a federal implementation plan for the identified nonattainment area or areas. The provisions of 40 Code of Federal Regulations (CFR) Parts 51 and 93 apply in all nonattainment and maintenance areas for transportation-related criteria pollutants for which the area is designated nonattainment or has a maintenance plan. Applicable federal standards are summarized in Table 3: State and Federal Ambient Air Quality Standards. Table 3: State and Federal Ambient Air Quality Standards Pollutant Averaging Time State Standards?Federal rN 1 Hour 0.09 ppm (180 pg/m3) NAOzone (03)8 Hour 0.070 ppm (137 pg/m3) 0.070 ppm (137 pg/m3) Respirable Particulate 24-Hour 50 pug/m3 150 pg/m3 Matter (PM10)” Annual Arithmetic Mean 20 ug/m3 NA Fine Particulate Matter 24-Hour NA 35 pug/m3 (PM2.5)7 Annual Arithmetic Mean 12 ug/m3 9.0 pg/m3 Carbon Monoxide (CO) 1 Hour 20 ppm (23 mg/m3) 35 ppm (40 mg/m3) 8 Hour 9.0 ppm (10 mg/m3) 9.0 ppm (10 mg/m3) Nitrogen Dioxide (NO2)® 1 Hour 0.18 ppm (339 pg/m3) 100 ppb (188 pg/m3) Annual Arithmetic Mean 0.030 ppm (57 pg/m3) 0.053 ppm (100 pg/m3) 1 Hour 0.25 ppm (655 pg/m3) 75 ppb (196 pg/m3) Sulfur Dioxide (SO,)° 24 Hour 0.04 ppm (105 pg/m3) 0.14 ppm (365 pug/m3) Annual Arithmetic Mean NA 0.03 ppm (80 pg/m3) 30-Day Average 1.5 pg/m3 NA Lead (Pb)10.11 Calendar Quarter NA 1.5 ug/m3 Rolling 3-Month Average NA 0.15 pg/m3 Visibility Reducing 8 hours See Note 11 NAParticles? Sulfates (5042) 24 Hour 25 ug/m3 NA Hydrogen Sulfide (H,S) 1 Hour 0.03 ppm (42 pug/m3) NA Vinyl Chloride (CH3Cl)10 24 Hour 0.01 ppm (26 pug/m3) NA ppm = parts per million; pg/m?= micrograms per cubic meter; mg/m?= milligrams per cubic meter; NA = no information available. 1. California standards for Os, CO (except Lake Tahoe), SO: {1-hour and 24-hour), NO, suspended particulate matter (PM10, PM2.5, and visibility reducing particles), are values that are not to be exceeded. All others are not to be equaled or exceeded. CAAQS are listed in the Table of Standards in Section 70200 of Title 17 of the California Code of Regulations. 2. Concentration expressed first in units in which it was promulgated. Equivalent units given in parentheses are based upon a reference temperature of 25° C and a reference pressure of 760 torr. Most measurements of air quality are to be corrected to a reference temperature of 25° C and a reference pressure of 760 torr; ppm in this table refers to ppm by volume, or micromoles of pollutant per kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 8Kimley»Horn Proposed projects in or near nonattainment areas could be subject to more stringent air-permitting requirements. As part of its enforcement responsibilities, the U.S. EPA requires each state with nonattainment areas to prepare and submit a State Implementation Plan that demonstrates the means to attain the NAAQS within the federally imposed deadlines. The State Implementation Plan must integrate federal, state, and local plan components and regulations to identify specific measures to reduce pollution in nonattainment areas, using a combination of performance standards and market-based programs. The U.S. EPA can withhold certain transportation funds from states that fail to comply with the planning requirements of the FCAA. If a State fails to correct these planning deficiencies within two years of Federal notification, the U.S. EPA is required to develop a federal implementation plan for the identified nonattainment area or areas. The provisions of 40 Code of Federal Regulations (CFR) Parts 51 and 93 apply in all nonattainment and maintenance areas for transportation-related criteria pollutants for which the area is designated nonattainment or has a maintenance plan. Applicable federal standards are summarized in Table 3: State and Federal Ambient Air Quality Standards. Table 3: State and Federal Ambient Air Quality Standards Pollutant Averaging Time State Standards?Federal rN 1 Hour 0.09 ppm (180 pg/m3) NAOzone (03)8 Hour 0.070 ppm (137 pg/m3) 0.070 ppm (137 pg/m3) Respirable Particulate 24-Hour 50 pug/m3 150 pg/m3 Matter (PM10)” Annual Arithmetic Mean 20 ug/m3 NA Fine Particulate Matter 24-Hour NA 35 pug/m3 (PM2.5)7 Annual Arithmetic Mean 12 ug/m3 9.0 pg/m3 Carbon Monoxide (CO) 1 Hour 20 ppm (23 mg/m3) 35 ppm (40 mg/m3) 8 Hour 9.0 ppm (10 mg/m3) 9.0 ppm (10 mg/m3) Nitrogen Dioxide (NO2)® 1 Hour 0.18 ppm (339 pg/m3) 100 ppb (188 pg/m3) Annual Arithmetic Mean 0.030 ppm (57 pg/m3) 0.053 ppm (100 pg/m3) 1 Hour 0.25 ppm (655 pg/m3) 75 ppb (196 pg/m3) Sulfur Dioxide (SO,)° 24 Hour 0.04 ppm (105 pg/m3) 0.14 ppm (365 pug/m3) Annual Arithmetic Mean NA 0.03 ppm (80 pg/m3) 30-Day Average 1.5 pg/m3 NA Lead (Pb)10.11 Calendar Quarter NA 1.5 ug/m3 Rolling 3-Month Average NA 0.15 pg/m3 Visibility Reducing 8 hours See Note 11 NAParticles? Sulfates (5042) 24 Hour 25 ug/m3 NA Hydrogen Sulfide (H,S) 1 Hour 0.03 ppm (42 pug/m3) NA Vinyl Chloride (CH3Cl)10 24 Hour 0.01 ppm (26 pug/m3) NA ppm = parts per million; pg/m?= micrograms per cubic meter; mg/m?= milligrams per cubic meter; NA = no information available. 1. California standards for Os, CO (except Lake Tahoe), SO: {1-hour and 24-hour), NO, suspended particulate matter (PM10, PM2.5, and visibility reducing particles), are values that are not to be exceeded. All others are not to be equaled or exceeded. CAAQS are listed in the Table of Standards in Section 70200 of Title 17 of the California Code of Regulations. 2. Concentration expressed first in units in which it was promulgated. Equivalent units given in parentheses are based upon a reference temperature of 25° C and a reference pressure of 760 torr. Most measurements of air quality are to be corrected to a reference temperature of 25° C and a reference pressure of 760 torr; ppm in this table refers to ppm by volume, or micromoles of pollutant per kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 9 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Table 3: State and Federal Ambient Air Quality Standards Pollutant Averaging Time State Standards1,2 Federal Standards3,4,5 mole of gas. 3. National standards (other than ozone, particulate matter, and those based on annual arithmetic mean) are not to be exceeded more than once a year. The ozone standard is attained when the fourth highest 8-hour concentration measured at each site in a year, averaged over three years, is equal to or less than the standard. For PM10, the 24-hour standard is attained when the expected number of days per calendar year with a 24-hour average concentration above 150 µg/m3 is equal to or less than one. For PM2.5, the 24-hour standard is attained when 98 percent of the daily concentrations, averaged over three years, are equal to or less than the standard. Contact the U.S. EPA for further clarification and current national policies 4. Any equivalent measurement method which can be shown to the satisfaction of the ARB to give equivalent results at or near the level of the air quality standard may be used. 5. National Primary Standards: The levels of air quality necessary, with an adequate margin of safety to protect the public health. 6. On October 1, 2015, the national 8-hour ozone primary and secondary standards were lowered from 0.075 to 0.070 ppm. 7. On February 7, 2024, the national annual PM2.5 primary standard was lowered from 12.0 µg/m3 to 9.0 µg/m3. The existing national 24-hour PM2.5 standards (primary and secondary) were retained at 35 µg/m3, as was the annual secondary standard of 15.0 µg/m3. The existing 24-hour PM10 standards (primary and secondary) of 150 µg/m3 also were retained. The form of the annual primary and secondary standards is the annual mean, averaged over 3 years. 8. To attain the 1-hour national standard, the 3-year average of the annual 98th percentile of the 1-hour daily maximum concentrations at each site must not exceed 100 ppb. Note that the national 1-hour standard is in units of parts per billion (ppb). California standards are in units of parts per million (ppm). To directly compare the national 1-hour standard to the California standards the units can be converted from ppb to ppm. In this case, the national standard of 100 ppb is identical to 0.100 ppm. 9. On June 2, 2010, a new 1-hour SO2 standard was established and the existing 24-hour and annual primary standards were revoked. To attain the 1-hour national standard, the 3-year average of the annual 99th percentile of the 1-hour daily maximum concentrations at each site must not exceed 75 ppb. The 1971 SO2 national standards (24-hour and annual) remain in effect until one year after an area is designated for the 2010 standard, except that in areas designated nonattainment for the 1971 standards, the 1971 standards remain in effect until implementation plans to attain or maintain the 2010 standards are approved. Note that the 1-hour standard is in units of parts per billion (ppb). California standards are in units of parts per million (ppm). To directly compare the 1-hour standard to the California standard the units can be converted to ppm. In this case, the national standard of 75 ppb is identical to 0.075 ppm. 10. The ARB has identified lead and vinyl chloride as “toxic air contaminants” with no threshold level of exposure for adverse health effects determined. These actions allow for the implementation of control measures at levels below the ambient concentrations specified for these pollutants. 11. The national standard for lead was revised on October 15, 2008 to a rolling 3-month average. The 1978 lead standard (1.5 µg/m3 as a quarterly average) remains in effect until one year after an area is designated for the 2008 standard, except that in areas designated nonattainment for the 1978 standard, the 1978 standard remains in effect until implementation plans to attain or maintain the 2008 standard are approved. Source: South Coast Air Quality Management District, Air Quality Management Plan, 2022; California Air Resources Board, Ambient Air Quality Standards, 2016; and United States Environmental Protection Agency, NAAQS Tables, 2024, https://www.epa.gov/criteria-air-pollutants/naaqs-table. Accessed August 12, 2025. State California Air Resources Board Pursuant to the Mulford-Carrell Act, the California Air Resources Board (CARB) established the CAAQS for criteria pollutants and other pollutants such as visibility reducing particulates, hydrogen sulfide, and sulfates in 1969. The CAAQS, included in Table 3, are generally more stringent and apply to more pollutants than the NAAQS.3 The California Clean Air Act (CCAA) was approved in 1988 and requires that each local air district prepare and maintain an Air Quality Management Plan (AQMP) to achieve compliance with the CAAQS. These AQMPs outline emissions limits and control measures to achieve and maintain these 3 California Air Resources Board, California Ambient Air Quality Standards, https://ww2.arb.ca.gov/resources/california-ambient-air- quality-standards. Accessed August 12, 2025. Kimley»Horn Page Table 3: State and Federal Ambient Air Quality Standards Pollutant | Averaging Time | State Standards’? Federal Standard: mole of gas. 3. National standards {other than ozone, particulate matter, and those based on annual arithmetic mean) are not to be exceeded more than once a year. The ozone standard is attained when the fourth highest 8-hour concentration measured at each site in a year, averaged over three years, is equal to or less than the standard. For PM10, the 24-hour standard is attained when the expected number of days per calendar year with a 24-hour average concentration above 150 pg/m? is equal to or less than one. For PM2.5, the 24-hour standard is attained when 98 percent of the daily concentrations, averaged over three years, are equal to or less than the standard. Contact the U.S. EPA for further clarification and current national policies 4. Any equivalent measurement method which can be shown to the satisfaction of the ARB to give equivalent results at or near the level of the air quality standard may be used. 5. National Primary Standards: The levels of air quality necessary, with an adequate margin of safety to protect the public health. On October 1, 2015, the national 8-hour ozone primary and secondary standards were lowered from 0.075 to 0.070 ppm. 7. On February 7, 2024, the national annual PM2.5 primary standard was lowered from 12.0 pg/m?3 to 9.0 pg/m3. The existing national 24-hour PM2.5 standards (primary and secondary) were retained at 35 pg/m3, as was the annual secondary standard of 15.0 pg/m3. The existing 24-hour PM10 standards (primary and secondary) of 150 pg/m? also were retained. The form of the annual primary and secondary standards is the annual mean, averaged over 3 years. 8. To attain the 1-hour national standard, the 3-year average of the annual 98th percentile of the 1-hour daily maximum concentrations at each site must not exceed 100 ppb. Note that the national 1-hour standard is in units of parts per billion (ppb). California standards are in units of parts per million (ppm). To directly compare the national 1-hour standard to the California standards the units can be converted from ppb to ppm. In this case, the national standard of 100 ppb is identical to 0.100 ppm. 9. OnlJune 2, 2010, a new 1-hour SO; standard was established and the existing 24-hour and annual primary standards were revoked. To attain the 1-hour national standard, the 3-year average of the annual 99th percentile of the 1-hour daily maximum concentrations at each site must not exceed 75 ppb. The 1971 SO: national standards (24-hour and annual) remain in effect until one year after an area is designated for the 2010 standard, except that in areas designated nonattainment for the 1971 standards, the 1971 standards remain in effect until implementation plans to attain or maintain the 2010 standards are approved. Note that the 1-hour standard is in units of parts per billion (ppb). California standards are in units of parts per million (ppm). To directly compare the 1-hour standard to the California standard the units can be converted to ppm. In this case, the national standard of 75 ppb is identical to 0.075 ppm. 10. The ARB has identified lead and vinyl chloride as “toxic air contaminants” with no threshold level of exposure for adverse health effects determined. These actions allow for the implementation of control measures at levels below the ambient concentrations specified for these pollutants. 11. The national standard for lead was revised on October 15, 2008 to a rolling 3-month average. The 1978 lead standard (1.5 pg/m3 as a quarterly average) remains in effect until one year after an area is designated for the 2008 standard, except that in areas designated nonattainment for the 1978 standard, the 1978 standard remains in effect until implementation plans to attain or maintain the 2008 standard are approved. o Source: South Coast Air Quality Management District, Air Quality Management Plan, 2022; California Air Resources Board, Ambient Air Quality Standards, 2016; and United States Environmental Protection Agency, NAAQS Tables, 2024, https://www.epa.gov/criteria-air- pollutants/naags-table. Accessed August 12, 2025. State California Air Resources Board Pursuant to the Mulford-Carrell Act, the California Air Resources Board (CARB) established the CAAQS for criteria pollutants and other pollutants such as visibility reducing particulates, hydrogen sulfide, and sulfates in 1969. The CAAQS, included in Table 3, are generally more stringent and apply to more pollutants than the NAAQS.? The California Clean Air Act (CCAA) was approved in 1988 and requires that each local air district prepare and maintain an Air Quality Management Plan (AQMP) to achieve compliance with the CAAQS. These AQMPs outline emissions limits and control measures to achieve and maintain these 3 (California Air Resources Board, California Ambient Air Quality Standards, https://ww2.arb.ca.gov/resources/california-ambient-air- quality-standards. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page Table 3: State and Federal Ambient Air Quality Standards Pollutant | Averaging Time | State Standards’? Federal Standard: mole of gas. 3. National standards {other than ozone, particulate matter, and those based on annual arithmetic mean) are not to be exceeded more than once a year. The ozone standard is attained when the fourth highest 8-hour concentration measured at each site in a year, averaged over three years, is equal to or less than the standard. For PM10, the 24-hour standard is attained when the expected number of days per calendar year with a 24-hour average concentration above 150 pg/m? is equal to or less than one. For PM2.5, the 24-hour standard is attained when 98 percent of the daily concentrations, averaged over three years, are equal to or less than the standard. Contact the U.S. EPA for further clarification and current national policies 4. Any equivalent measurement method which can be shown to the satisfaction of the ARB to give equivalent results at or near the level of the air quality standard may be used. 5. National Primary Standards: The levels of air quality necessary, with an adequate margin of safety to protect the public health. On October 1, 2015, the national 8-hour ozone primary and secondary standards were lowered from 0.075 to 0.070 ppm. 7. On February 7, 2024, the national annual PM2.5 primary standard was lowered from 12.0 pg/m?3 to 9.0 pg/m3. The existing national 24-hour PM2.5 standards (primary and secondary) were retained at 35 pg/m3, as was the annual secondary standard of 15.0 pg/m3. The existing 24-hour PM10 standards (primary and secondary) of 150 pg/m? also were retained. The form of the annual primary and secondary standards is the annual mean, averaged over 3 years. 8. To attain the 1-hour national standard, the 3-year average of the annual 98th percentile of the 1-hour daily maximum concentrations at each site must not exceed 100 ppb. Note that the national 1-hour standard is in units of parts per billion (ppb). California standards are in units of parts per million (ppm). To directly compare the national 1-hour standard to the California standards the units can be converted from ppb to ppm. In this case, the national standard of 100 ppb is identical to 0.100 ppm. 9. OnlJune 2, 2010, a new 1-hour SO; standard was established and the existing 24-hour and annual primary standards were revoked. To attain the 1-hour national standard, the 3-year average of the annual 99th percentile of the 1-hour daily maximum concentrations at each site must not exceed 75 ppb. The 1971 SO: national standards (24-hour and annual) remain in effect until one year after an area is designated for the 2010 standard, except that in areas designated nonattainment for the 1971 standards, the 1971 standards remain in effect until implementation plans to attain or maintain the 2010 standards are approved. Note that the 1-hour standard is in units of parts per billion (ppb). California standards are in units of parts per million (ppm). To directly compare the 1-hour standard to the California standard the units can be converted to ppm. In this case, the national standard of 75 ppb is identical to 0.075 ppm. 10. The ARB has identified lead and vinyl chloride as “toxic air contaminants” with no threshold level of exposure for adverse health effects determined. These actions allow for the implementation of control measures at levels below the ambient concentrations specified for these pollutants. 11. The national standard for lead was revised on October 15, 2008 to a rolling 3-month average. The 1978 lead standard (1.5 pg/m3 as a quarterly average) remains in effect until one year after an area is designated for the 2008 standard, except that in areas designated nonattainment for the 1978 standard, the 1978 standard remains in effect until implementation plans to attain or maintain the 2008 standard are approved. o Source: South Coast Air Quality Management District, Air Quality Management Plan, 2022; California Air Resources Board, Ambient Air Quality Standards, 2016; and United States Environmental Protection Agency, NAAQS Tables, 2024, https://www.epa.gov/criteria-air- pollutants/naags-table. Accessed August 12, 2025. State California Air Resources Board Pursuant to the Mulford-Carrell Act, the California Air Resources Board (CARB) established the CAAQS for criteria pollutants and other pollutants such as visibility reducing particulates, hydrogen sulfide, and sulfates in 1969. The CAAQS, included in Table 3, are generally more stringent and apply to more pollutants than the NAAQS.? The California Clean Air Act (CCAA) was approved in 1988 and requires that each local air district prepare and maintain an Air Quality Management Plan (AQMP) to achieve compliance with the CAAQS. These AQMPs outline emissions limits and control measures to achieve and maintain these 3 (California Air Resources Board, California Ambient Air Quality Standards, https://ww2.arb.ca.gov/resources/california-ambient-air- quality-standards. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 10 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 standards by the earliest practical date and serve as the basis for the preparation of the State Implementation Plan for meeting the NAAQS for the State.4 Like the U.S. EPA, the CARB designates areas within California as either attainment or nonattainment for each criteria pollutant based on whether the CAAQS have been achieved. Under the CCAA, areas are designated as nonattainment for a pollutant if the air quality data shows that a CAAQS for the pollutant was violated at least once during the previous three calendar years. Exceedances that are affected by highly irregular or infrequent events such as wildfires, volcanoes, etc. are not considered violations of a CAAQS, and are not used as a basis for designating areas as nonattainment. Regional South Coast Air Quality Management District The SCAQMD is the air pollution control agency for Orange County and the urban portions of Los Angeles, Riverside, and San Bernardino Counties. The agency’s primary responsibility is to ensure that the NAAQS and CAAQS are attained and maintained in the SoCAB. The SCAQMD is also responsible for adopting and enforcing rules and regulations concerning air pollutant sources, issuing permits for stationary sources of air pollutants, inspecting stationary sources of air pollutants, responding to citizen complaints, monitoring ambient air quality and meteorological conditions, awarding grants to reduce motor vehicle emissions, conducting public education campaigns, and many other activities. The SCAQMD is the lead agency in charge of developing the AQMP, with input from the Southern California Association of Governments (SCAG) and CARB. The AQMP is a comprehensive plan that includes control strategies to reduce emissions from stationary and area sources, as well as for on- road and off-road mobile sources. SCAG is designated as a Metropolitan Planning Organization under federal law and a Regional Transportation Planning Agency and Council of Governments under State law. SCAG’s primary responsibility is to provide future growth projections and develop and implement transportation control measures. CARB, in coordination with federal agencies, has jurisdiction over mobile sources. The 2016 AQMP was adopted by the SCAQMD Governing Board on March 3, 2017. The purpose of the 2016 AQMP is to set forth a comprehensive and integrated program that would lead the air basin into compliance with the federal 24-hour PM2.5 air quality standard, and to provide an update to the SCAQMD’s commitments towards meeting the 8-hour O3 NAAQS. Specifically, the 2016 AQMP covers the following NAAQS: 1979 1-hour O3 NAAQS, 1997 8-hour O3 NAAQS, 2006 24-hour PM2.5 NAAQS, 2008 8-hour O3 NAAQS, and the 2012 annual PM2.5 NAAQS. The 2022 AQMP, adopted by the SCAQMD Governing Board on December 2, 2022, was developed to address the requirements for meeting the 2015 8-hour O3 standard. The 2022 AQMP builds upon measures already in place from previous AQMPs. It also includes a variety of additional strategies such as regulations, accelerated deployment of available cleaner technologies (e.g., zero emissions 4 South Coast Air Quality Management District, Final 2016 Air Quality Management Plan, 2017, https://www.aqmd.gov/docs/default- source/clean-air-plans/air-quality-management-plans/2016-air-quality-management-plan/final-2016- aqmp/final2016aqmp.pdf?sfvrsn=15. Accessed August 12, 2025. Kimley»Horn page 10 standards by the earliest practical date and serve as the basis for the preparation of the State Implementation Plan for meeting the NAAQS for the State.” Like the U.S. EPA, the CARB designates areas within California as either attainment or nonattainment for each criteria pollutant based on whether the CAAQS have been achieved. Under the CCAA, areas are designated as nonattainment for a pollutant if the air quality data shows that a CAAQS for the pollutant was violated at least once during the previous three calendar years. Exceedances that are affected by highly irregular or infrequent events such as wildfires, volcanoes, etc. are not considered violations of a CAAQS, and are not used as a basis for designating areas as nonattainment. Regional South Coast Air Quality Management District The SCAQMD is the air pollution control agency for Orange County and the urban portions of Los Angeles, Riverside, and San Bernardino Counties. The agency’s primary responsibility is to ensure that the NAAQS and CAAQS are attained and maintained in the SoCAB. The SCAQMD is also responsible for adopting and enforcing rules and regulations concerning air pollutant sources, issuing permits for stationary sources of air pollutants, inspecting stationary sources of air pollutants, responding to citizen complaints, monitoring ambient air quality and meteorological conditions, awarding grants to reduce motor vehicle emissions, conducting public education campaigns, and many other activities. The SCAQMD is the lead agency in charge of developing the AQMP, with input from the Southern California Association of Governments (SCAG) and CARB. The AQMP is a comprehensive plan that includes control strategies to reduce emissions from stationary and area sources, as well as for on- road and off-road mobile sources. SCAG is designated as a Metropolitan Planning Organization under federal law and a Regional Transportation Planning Agency and Council of Governments under State law. SCAG’s primary responsibility is to provide future growth projections and develop and implement transportation control measures. CARB, in coordination with federal agencies, has jurisdiction over mobile sources. The 2016 AQMP was adopted by the SCAQMD Governing Board on March 3, 2017. The purpose of the 2016 AQMP is to set forth a comprehensive and integrated program that would lead the air basin into compliance with the federal 24-hour PM2.5 air quality standard, and to provide an update to the SCAQMD’s commitments towards meeting the 8-hour O; NAAQS. Specifically, the 2016 AQMP covers the following NAAQS: 1979 1-hour O; NAAQS, 1997 8-hour O; NAAQS, 2006 24-hour PM2.5 NAAQS, 2008 8-hour Oz NAAQS, and the 2012 annual PM2.5 NAAQS. The 2022 AQMP, adopted by the SCAQMD Governing Board on December 2, 2022, was developed to address the requirements for meeting the 2015 8-hour O; standard. The 2022 AQMP builds upon measures already in place from previous AQMPs. It also includes a variety of additional strategies such as regulations, accelerated deployment of available cleaner technologies (e.g., zero emissions 4 South Coast Air Quality Management District, Final 2016 Air Quality Management Plan, 2017, https://www.agmd.gov/docs/default- source/clean-air-plans/air-quality-management-plans/2016-air-quality-management-plan/final-2016- agmp/final2016agmp.pdf?sfursn=15. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 10 standards by the earliest practical date and serve as the basis for the preparation of the State Implementation Plan for meeting the NAAQS for the State.” Like the U.S. EPA, the CARB designates areas within California as either attainment or nonattainment for each criteria pollutant based on whether the CAAQS have been achieved. Under the CCAA, areas are designated as nonattainment for a pollutant if the air quality data shows that a CAAQS for the pollutant was violated at least once during the previous three calendar years. Exceedances that are affected by highly irregular or infrequent events such as wildfires, volcanoes, etc. are not considered violations of a CAAQS, and are not used as a basis for designating areas as nonattainment. Regional South Coast Air Quality Management District The SCAQMD is the air pollution control agency for Orange County and the urban portions of Los Angeles, Riverside, and San Bernardino Counties. The agency’s primary responsibility is to ensure that the NAAQS and CAAQS are attained and maintained in the SoCAB. The SCAQMD is also responsible for adopting and enforcing rules and regulations concerning air pollutant sources, issuing permits for stationary sources of air pollutants, inspecting stationary sources of air pollutants, responding to citizen complaints, monitoring ambient air quality and meteorological conditions, awarding grants to reduce motor vehicle emissions, conducting public education campaigns, and many other activities. The SCAQMD is the lead agency in charge of developing the AQMP, with input from the Southern California Association of Governments (SCAG) and CARB. The AQMP is a comprehensive plan that includes control strategies to reduce emissions from stationary and area sources, as well as for on- road and off-road mobile sources. SCAG is designated as a Metropolitan Planning Organization under federal law and a Regional Transportation Planning Agency and Council of Governments under State law. SCAG’s primary responsibility is to provide future growth projections and develop and implement transportation control measures. CARB, in coordination with federal agencies, has jurisdiction over mobile sources. The 2016 AQMP was adopted by the SCAQMD Governing Board on March 3, 2017. The purpose of the 2016 AQMP is to set forth a comprehensive and integrated program that would lead the air basin into compliance with the federal 24-hour PM2.5 air quality standard, and to provide an update to the SCAQMD’s commitments towards meeting the 8-hour O; NAAQS. Specifically, the 2016 AQMP covers the following NAAQS: 1979 1-hour O; NAAQS, 1997 8-hour O; NAAQS, 2006 24-hour PM2.5 NAAQS, 2008 8-hour Oz NAAQS, and the 2012 annual PM2.5 NAAQS. The 2022 AQMP, adopted by the SCAQMD Governing Board on December 2, 2022, was developed to address the requirements for meeting the 2015 8-hour O; standard. The 2022 AQMP builds upon measures already in place from previous AQMPs. It also includes a variety of additional strategies such as regulations, accelerated deployment of available cleaner technologies (e.g., zero emissions 4 South Coast Air Quality Management District, Final 2016 Air Quality Management Plan, 2017, https://www.agmd.gov/docs/default- source/clean-air-plans/air-quality-management-plans/2016-air-quality-management-plan/final-2016- agmp/final2016agmp.pdf?sfursn=15. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 11 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 technologies, when cost-effective and feasible, and low NOX technologies in other applications), best management practices, co-benefits from existing programs (e.g., climate and energy efficiency), incentives, and other FCAA measures to achieve the 2015 8-hour O3 standard. The SCAQMD has published the California Environmental Quality Act (CEQA) Air Quality Handbook (approved by the SCAQMD Governing Board in 1993 and augmented with guidance for Local Significance Thresholds [LSTs] in 2008).5 The SCAQMD guidance helps local government agencies and consultants to develop environmental documents required by CEQA and suggests thresholds of significance for criteria pollutants for both construction and operation (see discussion of thresholds below). With the help of SCAQMD’s CEQA Air Quality Handbook and associated guidance, local land use planners and consultants are able to analyze and document how proposed and existing projects affect air quality in order to meet the requirements of the CEQA review process. The SCAQMD periodically provides supplemental guidance and updates to the handbook on their website. The State and federal attainment status designations for the SoCAB are summarized in Table 4: South Coast Air Basin Attainment Status. The SoCAB is currently designated as a nonattainment area for the O3, PM10, and PM2.5 CAAQS, as well as the O3 and PM2.5 NAAQS. The SoCAB is designated as attainment or unclassified for the remaining CAAQS and NAAQS. Table 4: South Coast Air Basin Attainment Status Pollutant State Federal Ozone (O3) (1 Hour Standard) Nonattainment Nonattainment (Extreme) Ozone (O3) (8 Hour Standard) Nonattainment Nonattainment (Extreme) Particulate Matter (PM2.5) (24 Hour Standard) – Nonattainment (Serious) Particulate Matter (PM2.5) (Annual Standard) Nonattainment Nonattainment (Serious) Particulate Matter (PM10) (24 Hour Standard) Nonattainment Attainment (Maintenance) Particulate Matter (PM10) (Annual Standard) Nonattainment – Carbon Monoxide (CO) (1 Hour Standard) Attainment Attainment (Maintenance) Carbon Monoxide (CO) (8 Hour Standard) Attainment Attainment (Maintenance) Nitrogen Dioxide (NO2) (1 Hour Standard) Attainment Unclassifiable/Attainment Nitrogen Dioxide (NO2) (Annual Standard) Attainment Attainment (Maintenance) Sulfur Dioxide (SO2) Attainment Unclassifiable/Attainment 5 South Coast Air Quality Management District, Final Localized Significance Threshold Methodology, 2008, https://www.aqmd.gov/home/rules-compliance/ceqa/air-quality-analysis-handbook/localized-significance-thresholds. Accessed August 12, 2025. Kimley»Horn Page 11 technologies, when cost-effective and feasible, and low NOx technologies in other applications), best management practices, co-benefits from existing programs (e.g., climate and energy efficiency), incentives, and other FCAA measures to achieve the 2015 8-hour Os; standard. The SCAQMD has published the California Environmental Quality Act (CEQA) Air Quality Handbook (approved by the SCAQMD Governing Board in 1993 and augmented with guidance for Local Significance Thresholds [LSTs] in 2008).° The SCAQMD guidance helps local government agencies and consultants to develop environmental documents required by CEQA and suggests thresholds of significance for criteria pollutants for both construction and operation (see discussion of thresholds below). With the help of SCAQMD’s CEQA Air Quality Handbook and associated guidance, local land use planners and consultants are able to analyze and document how proposed and existing projects affect air quality in order to meet the requirements of the CEQA review process. The SCAQMD periodically provides supplemental guidance and updates to the handbook on their website. The State and federal attainment status designations for the SoCAB are summarized in Table 4: South Coast Air Basin Attainment Status. The SoCAB is currently designated as a nonattainment area for the Oz, PM10, and PM2.5 CAAQS, as well as the Os and PM2.5 NAAQS. The SoCAB is designated as attainment or unclassified for the remaining CAAQS and NAAQS. Table 4: South Coast Air Basin Attainment Status Pollutant State Federal Ozone (03) (1 Hour Standard) Ozone (03) (8 Hour Standard) Particulate Matter (PM2.5) (24 Hour Standard) Nonattainment Nonattainment (Extreme) Nonattainment Nonattainment (Extreme) —- Nonattainment (Serious) Particulate Matter (PM2.5) Nonattainment Nonattainment (Serious) (Annual Standard) Particulate Matter (PM10) Nonattainment Attainment (Maintenance) (24 Hour Standard) Particulate Matter (PM10) Nonattainment (Annual Standard) Carbon Monoxide (CO)(1 Hour Standard) Attainment Attainment (Maintenance) Carbon Monoxide (CO) . . .(8 Hour Standard) Attainment Attainment (Maintenance) Nitrogen Dioxide (NO;) . . .(1 Hour Standard) Attainment Unclassifiable/Attainment Nitrogen Dioxide (NO,) . . .(Annual Standard) Attainment Attainment (Maintenance) Sulfur Dioxide (SO,) Attainment Unclassifiable/Attainment 5 South Coast Air Quality Management District, Final Localized Significance Threshold Methodology, 2008, https://www.agmd.gov/home/rules-compliance/cega/air-quality-analysis-handbook/localized-significance-thresholds. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page 11 technologies, when cost-effective and feasible, and low NOx technologies in other applications), best management practices, co-benefits from existing programs (e.g., climate and energy efficiency), incentives, and other FCAA measures to achieve the 2015 8-hour Os; standard. The SCAQMD has published the California Environmental Quality Act (CEQA) Air Quality Handbook (approved by the SCAQMD Governing Board in 1993 and augmented with guidance for Local Significance Thresholds [LSTs] in 2008).° The SCAQMD guidance helps local government agencies and consultants to develop environmental documents required by CEQA and suggests thresholds of significance for criteria pollutants for both construction and operation (see discussion of thresholds below). With the help of SCAQMD’s CEQA Air Quality Handbook and associated guidance, local land use planners and consultants are able to analyze and document how proposed and existing projects affect air quality in order to meet the requirements of the CEQA review process. The SCAQMD periodically provides supplemental guidance and updates to the handbook on their website. The State and federal attainment status designations for the SoCAB are summarized in Table 4: South Coast Air Basin Attainment Status. The SoCAB is currently designated as a nonattainment area for the Oz, PM10, and PM2.5 CAAQS, as well as the Os and PM2.5 NAAQS. The SoCAB is designated as attainment or unclassified for the remaining CAAQS and NAAQS. Table 4: South Coast Air Basin Attainment Status Pollutant State Federal Ozone (03) (1 Hour Standard) Ozone (03) (8 Hour Standard) Particulate Matter (PM2.5) (24 Hour Standard) Nonattainment Nonattainment (Extreme) Nonattainment Nonattainment (Extreme) —- Nonattainment (Serious) Particulate Matter (PM2.5) Nonattainment Nonattainment (Serious) (Annual Standard) Particulate Matter (PM10) Nonattainment Attainment (Maintenance) (24 Hour Standard) Particulate Matter (PM10) Nonattainment (Annual Standard) Carbon Monoxide (CO)(1 Hour Standard) Attainment Attainment (Maintenance) Carbon Monoxide (CO) . . .(8 Hour Standard) Attainment Attainment (Maintenance) Nitrogen Dioxide (NO;) . . .(1 Hour Standard) Attainment Unclassifiable/Attainment Nitrogen Dioxide (NO,) . . .(Annual Standard) Attainment Attainment (Maintenance) Sulfur Dioxide (SO,) Attainment Unclassifiable/Attainment 5 South Coast Air Quality Management District, Final Localized Significance Threshold Methodology, 2008, https://www.agmd.gov/home/rules-compliance/cega/air-quality-analysis-handbook/localized-significance-thresholds. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 12 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Table 4: South Coast Air Basin Attainment Status Pollutant State Federal (1 Hour Standard) Sulfur Dioxide (SO2) (24 Hour Standard) Attainment – Lead (Pb) (30 Day Standard) – Unclassifiable/Attainment Lead (Pb) (3 Month Standard) Attainment – Sulfates (SO4-2) (24 Hour Standard) Attainment – Hydrogen Sulfide (H2S) (1 Hour Standard) Unclassified – Source: South Coast Air Quality Management District, 2022 Air Quality Management Plan, 2022 and United States Environmental Protection Agency, Nonattainment Areas for Criteria Pollutants (Green Book), 2022. The following is a list of SCAQMD rules that are required of construction and operational activities associated with the Project: • Rule 402 (Nuisance) – This rule prohibits the discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort, repose, health, or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property. This rule does not apply to odors emanating from agricultural operations necessary for the growing of crops or the raising of fowl or animals. • Rule 403 (Fugitive Dust) – This rule requires fugitive dust sources to implement best available control measures for all sources, and all forms of visible particulate matter are prohibited from crossing any property line. This rule is intended to reduce PM10 emissions from any transportation, handling, construction, or storage activity that has the potential to generate fugitive dust. PM10 suppression techniques are summarized below. o Portions of a construction site to remain inactive longer than a period of three months will be seeded and watered until grass cover is grown or otherwise stabilized. o All on-site roads will be paved as soon as feasible or watered periodically or chemically stabilized. o All material transported off-site will be either sufficiently watered or securely covered to prevent excessive amounts of dust. o The area disturbed by clearing, grading, earthmoving, or excavation operations will be minimized at all times. Kimley»Horn page 12 Table 4: South Coast Air Basin Attainment Status Pollutant State (1 Hour Standard) Sulfur Dioxide (SO) . (24 Hour Standard) Attainment Lead (Pb) . .(30 Day Standard) Unclassifiable/Attainment Lead (Pb) . (3 Month Standard) Attainment Sulfates (S04.) .Att t —{24 Hour Standard) ainmen Hydrogen Sulfide (H,S) .Unclassified -(1 Hour Standard) nclassitie Source: South Coast Air Quality Management District, 2022 Air Quality Management Plan, 2022 and United States Environmental Protection Agency, Nonattainment Areas for Criteria Pollutants (Green Book), 2022. The following is a list of SCAQMD rules that are required of construction and operational activities associated with the Project: ¢ Rule 402 (Nuisance) — This rule prohibits the discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort, repose, health, or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property. This rule does not apply to odors emanating from agricultural operations necessary for the growing of crops or the raising of fowl or animals. e Rule 403 (Fugitive Dust) — This rule requires fugitive dust sources to implement best available control measures for all sources, and all forms of visible particulate matter are prohibited from crossing any property line. This rule is intended to reduce PM10 emissions from any transportation, handling, construction, or storage activity that has the potential to generate fugitive dust. PM10 suppression techniques are summarized below. o Portions ofa construction site to remain inactive longer than a period of three months will be seeded and watered until grass cover is grown or otherwise stabilized. o All on-site roads will be paved as soon as feasible or watered periodically or chemically stabilized. o All material transported off-site will be either sufficiently watered or securely covered to prevent excessive amounts of dust. o The area disturbed by clearing, grading, earthmoving, or excavation operations will be minimized at all times. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 12 Table 4: South Coast Air Basin Attainment Status Pollutant State (1 Hour Standard) Sulfur Dioxide (SO) . (24 Hour Standard) Attainment Lead (Pb) . .(30 Day Standard) Unclassifiable/Attainment Lead (Pb) . (3 Month Standard) Attainment Sulfates (S04.) .Att t —{24 Hour Standard) ainmen Hydrogen Sulfide (H,S) .Unclassified -(1 Hour Standard) nclassitie Source: South Coast Air Quality Management District, 2022 Air Quality Management Plan, 2022 and United States Environmental Protection Agency, Nonattainment Areas for Criteria Pollutants (Green Book), 2022. The following is a list of SCAQMD rules that are required of construction and operational activities associated with the Project: ¢ Rule 402 (Nuisance) — This rule prohibits the discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort, repose, health, or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property. This rule does not apply to odors emanating from agricultural operations necessary for the growing of crops or the raising of fowl or animals. e Rule 403 (Fugitive Dust) — This rule requires fugitive dust sources to implement best available control measures for all sources, and all forms of visible particulate matter are prohibited from crossing any property line. This rule is intended to reduce PM10 emissions from any transportation, handling, construction, or storage activity that has the potential to generate fugitive dust. PM10 suppression techniques are summarized below. o Portions ofa construction site to remain inactive longer than a period of three months will be seeded and watered until grass cover is grown or otherwise stabilized. o All on-site roads will be paved as soon as feasible or watered periodically or chemically stabilized. o All material transported off-site will be either sufficiently watered or securely covered to prevent excessive amounts of dust. o The area disturbed by clearing, grading, earthmoving, or excavation operations will be minimized at all times. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 13 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 o Where vehicles leave a construction site and enter adjacent public streets, the streets will be swept daily or washed down at the end of the work day to remove soil tracked onto the paved surface. • Rule 431.2 (Sulfur Content of Liquid Fuels) - This rule limits the sulfur content in diesel and other liquid fuels for the purpose of both reducing the formation of sulfur oxides and particulates during combustion and to enable the use of add-on control devices for diesel fueled internal combustion engines. • Rule 445 (Wood Burning) – This rule prohibits permanently installed wood-burning devices into any new development. A wood-burning device means any fireplace, wood burning heater, or pellet-fueled wood heater, or any similarly enclosed, permanently installed, indoor or outdoor device burning any solid fuel for aesthetic or space-heating purposes, which has a heat input of less than one million British thermal units per hour. • Rule 1113 (Architectural Coatings) – This rule requires manufacturers, distributors, and end users of architectural and industrial maintenance coatings to reduce ROG emissions from the use of these coatings, primarily by placing limits on the ROG content of various coating categories. • Rule 1415 (Reduction of Refrigerant Emissions from Stationary Air Conditioning Systems) – The purpose of this rule is to reduce emissions of high-global warming potential refrigerants from stationary air conditioning systems by requiring projects to reclaim, recover, or recycle refrigerant and minimize leakage. Local City of Rosemead General Plan The City is responsible for the assessment and mitigation of air emissions resulting from its land use decisions. The City of Rosemead General Plan Resource Management Element contains the following applicable goal and policies relating to air quality: Goal 4: Effective contributions to regional efforts to improve air quality and conserve energy. Policy 4.1: Integrate air quality planning with City land use, economic development, and transportation planning efforts. Policy 4.2: Support programs that reduce air quality emissions related to vehicular travel. Policy 4.3: Support alternative transportation modes and technologies, and develop bike- and pedestrian- friendly neighborhoods and districts to reduce emissions associated with automobile use. Policy 4.4: Encourage energy conservation efforts and the incorporation of energy-saving designs and features into new and refurbished buildings. Kimley»Horn page 13 o Where vehicles leave a construction site and enter adjacent public streets, the streets will be swept daily or washed down at the end of the work day to remove soil tracked onto the paved surface. e Rule 431.2 (Sulfur Content of Liquid Fuels) - This rule limits the sulfur content in diesel and other liquid fuels for the purpose of both reducing the formation of sulfur oxides and particulates during combustion and to enable the use of add-on control devices for diesel fueled internal combustion engines. ¢ Rule 445 (Wood Burning) — This rule prohibits permanently installed wood-burning devices into any new development. A wood-burning device means any fireplace, wood burning heater, or pellet-fueled wood heater, or any similarly enclosed, permanently installed, indoor or outdoor device burning any solid fuel for aesthetic or space-heating purposes, which has a heat input of less than one million British thermal units per hour. e Rule 1113 (Architectural Coatings) — This rule requires manufacturers, distributors, and end users of architectural and industrial maintenance coatings to reduce ROG emissions from the use of these coatings, primarily by placing limits on the ROG content of various coating categories. e Rule 1415 (Reduction of Refrigerant Emissions from Stationary Air Conditioning Systems) — The purpose of this rule is to reduce emissions of high-global warming potential refrigerants from stationary air conditioning systems by requiring projects to reclaim, recover, or recycle refrigerant and minimize leakage. Local City of Rosemead General Plan The City is responsible for the assessment and mitigation of air emissions resulting from its land use decisions. The City of Rosemead General Plan Resource Management Element contains the following applicable goal and policies relating to air quality: Goal 4: Effective contributions to regional efforts to improve air quality and conserve energy. Policy 4.1: Integrate air quality planning with City land use, economic development, and transportation planning efforts. Policy 4.2: Support programs that reduce air quality emissions related to vehicular travel. Policy 4.3: Support alternative transportation modes and technologies, and develop bike- and pedestrian- friendly neighborhoods and districts to reduce emissions associated with automobile use. Policy 4.4: Encourage energy conservation efforts and the incorporation of energy-saving designs and features into new and refurbished buildings. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 13 o Where vehicles leave a construction site and enter adjacent public streets, the streets will be swept daily or washed down at the end of the work day to remove soil tracked onto the paved surface. e Rule 431.2 (Sulfur Content of Liquid Fuels) - This rule limits the sulfur content in diesel and other liquid fuels for the purpose of both reducing the formation of sulfur oxides and particulates during combustion and to enable the use of add-on control devices for diesel fueled internal combustion engines. ¢ Rule 445 (Wood Burning) — This rule prohibits permanently installed wood-burning devices into any new development. A wood-burning device means any fireplace, wood burning heater, or pellet-fueled wood heater, or any similarly enclosed, permanently installed, indoor or outdoor device burning any solid fuel for aesthetic or space-heating purposes, which has a heat input of less than one million British thermal units per hour. e Rule 1113 (Architectural Coatings) — This rule requires manufacturers, distributors, and end users of architectural and industrial maintenance coatings to reduce ROG emissions from the use of these coatings, primarily by placing limits on the ROG content of various coating categories. e Rule 1415 (Reduction of Refrigerant Emissions from Stationary Air Conditioning Systems) — The purpose of this rule is to reduce emissions of high-global warming potential refrigerants from stationary air conditioning systems by requiring projects to reclaim, recover, or recycle refrigerant and minimize leakage. Local City of Rosemead General Plan The City is responsible for the assessment and mitigation of air emissions resulting from its land use decisions. The City of Rosemead General Plan Resource Management Element contains the following applicable goal and policies relating to air quality: Goal 4: Effective contributions to regional efforts to improve air quality and conserve energy. Policy 4.1: Integrate air quality planning with City land use, economic development, and transportation planning efforts. Policy 4.2: Support programs that reduce air quality emissions related to vehicular travel. Policy 4.3: Support alternative transportation modes and technologies, and develop bike- and pedestrian- friendly neighborhoods and districts to reduce emissions associated with automobile use. Policy 4.4: Encourage energy conservation efforts and the incorporation of energy-saving designs and features into new and refurbished buildings. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 14 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Significance Thresholds Based upon the criteria derived from the CEQA Guidelines Appendix G, a project would normally have a significant effect on the environment if it would: (a) Conflict with or obstruct implementation of the applicable air quality plan. (b) Result in a cumulatively considerable net increase of any criteria pollutant for which the Project region is in nonattainment under an applicable state or federal ambient air quality standard. (c) Expose sensitive receptors to substantial pollutant concentrations. (d) Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people. South Coast Air Quality Management District The significance criteria established by SCAQMD may be relied upon to make the above determinations. Regional Emissions Threshold The SCAQMD CEQA Air Quality Handbook provides significance thresholds, presented in Table 5: South Coast Air Quality Management District Significance Thresholds, for volatile organic compounds (VOC) (also referred to as ROG), NOX, CO, sulfur oxides (SOX), PM10, and PM2.5. The thresholds apply to both construction and operation of land use development projects within the SCAQMD jurisdictional boundaries. If the SCAQMD thresholds are exceeded, a potentially significant impact may occur, and additional analysis is warranted to fully assess the significance of impacts. However, ultimately the City, as the Lead Agency under CEQA, determines the thresholds of significance for impacts. Table 5: South Coast Air Quality Management District Significance Thresholds Pollutant Mass Daily Thresholds (pounds per day) Construction Operations Volatile Organic Compounds (VOC)1 75 55 Nitrogen Oxides (NOX) 100 55 Carbon Monoxide (CO) 550 550 Sulfur Oxides (SOX) 150 150 Coarse Particulate Matter (PM10) 150 150 Fine Particulate Matter (PM2.5) 55 55 1. VOCs and ROGs are subsets of organic gases that are emitted from the incomplete combustion of hydrocarbons or other carbon- based fuels. Although they represent slightly different subsets of organic gases, they are used interchangeably for the purposes of this analysis. Source: South Coast Air Quality Management District, South Coast AQMD Air Quality Significance Thresholds, March 2023. Kimley»Horn page 14 Significance Thresholds Based upon the criteria derived from the CEQA Guidelines Appendix G, a project would normally have a significant effect on the environment if it would: (a) Conflict with or obstruct implementation of the applicable air quality plan. (b) Result in a cumulatively considerable net increase of any criteria pollutant for which the Project region is in nonattainment under an applicable state or federal ambient air quality standard. (c) Expose sensitive receptors to substantial pollutant concentrations. (d) Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people. South Coast Air Quality Management District The significance criteria established by SCAQMD may be relied upon to make the above determinations. Regional Emissions Threshold The SCAQMD CEQA Air Quality Handbook provides significance thresholds, presented in Table 5: South Coast Air Quality Management District Significance Thresholds, for volatile organic compounds (VOC) (also referred to as ROG), NOx, CO, sulfur oxides (SOx), PM10, and PM2.5. The thresholds apply to both construction and operation of land use development projects within the SCAQMD jurisdictional boundaries. If the SCAQMD thresholds are exceeded, a potentially significant impact may occur, and additional analysis is warranted to fully assess the significance of impacts. However, ultimately the City, as the Lead Agency under CEQA, determines the thresholds of significance for impacts. Table 5: South Coast Air Quality Management District Significance Thresholds Mass Daily Thresholds (pounds per daPollutant . y a P ay)Construction Operations Volatile Organic Compounds (VOC)! 75 55 Nitrogen Oxides (NOx) 100 55 Carbon Monoxide (CO) 550 550 Sulfur Oxides (SOx) 150 150 Coarse Particulate Matter (PM10) 150 150 Fine Particulate Matter (PM2.5) 55 55 1. VOCs and ROGs are subsets of organic gases that are emitted from the incomplete combustion of hydrocarbons or other carbon- based fuels. Although they represent slightly different subsets of organic gases, they are used interchangeably for the purposes of this analysis. Source: South Coast Air Quality Management District, South Coast AQMD Air Quality Significance Thresholds, March 2023. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 14 Significance Thresholds Based upon the criteria derived from the CEQA Guidelines Appendix G, a project would normally have a significant effect on the environment if it would: (a) Conflict with or obstruct implementation of the applicable air quality plan. (b) Result in a cumulatively considerable net increase of any criteria pollutant for which the Project region is in nonattainment under an applicable state or federal ambient air quality standard. (c) Expose sensitive receptors to substantial pollutant concentrations. (d) Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people. South Coast Air Quality Management District The significance criteria established by SCAQMD may be relied upon to make the above determinations. Regional Emissions Threshold The SCAQMD CEQA Air Quality Handbook provides significance thresholds, presented in Table 5: South Coast Air Quality Management District Significance Thresholds, for volatile organic compounds (VOC) (also referred to as ROG), NOx, CO, sulfur oxides (SOx), PM10, and PM2.5. The thresholds apply to both construction and operation of land use development projects within the SCAQMD jurisdictional boundaries. If the SCAQMD thresholds are exceeded, a potentially significant impact may occur, and additional analysis is warranted to fully assess the significance of impacts. However, ultimately the City, as the Lead Agency under CEQA, determines the thresholds of significance for impacts. Table 5: South Coast Air Quality Management District Significance Thresholds Mass Daily Thresholds (pounds per daPollutant . y a P ay)Construction Operations Volatile Organic Compounds (VOC)! 75 55 Nitrogen Oxides (NOx) 100 55 Carbon Monoxide (CO) 550 550 Sulfur Oxides (SOx) 150 150 Coarse Particulate Matter (PM10) 150 150 Fine Particulate Matter (PM2.5) 55 55 1. VOCs and ROGs are subsets of organic gases that are emitted from the incomplete combustion of hydrocarbons or other carbon- based fuels. Although they represent slightly different subsets of organic gases, they are used interchangeably for the purposes of this analysis. Source: South Coast Air Quality Management District, South Coast AQMD Air Quality Significance Thresholds, March 2023. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 15 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Localized Significance Threshold The SCAQMD developed the LSTs for emissions of NO2, CO, PM10, and PM2.5 in response to the SCAQMD Governing Boards' Environmental Justice Enhancement Initiative (I-4). The SCAQMD provided the Final Localized Significance Threshold Methodology (dated June 2003 [revised 2008]) to assist lead agencies in analyzing localized impacts associated with project-specific emissions. LSTs represent the maximum emissions that can be generated at the Project Site that are not expected to cause or substantially contribute to an exceedance of the most stringent CAAQS or NAAQS. LSTs are based on the ambient concentrations of that pollutant within the Project SRA, as demarcated by the SCAQMD, the distance to the nearest sensitive receptor, and the Project Site acreage. The SCAQMD’s Localized Significance Threshold Methodology provides on-site mass emissions rate look-up tables. The Project Site is located within SCAQMD SRA 11 (South San Gabriel Valley). LSTs are provided for source-receptor distances of 25, 50, 100, 200, and 500 meters. The nearest sensitive receptors to the Project Site are the University of the West located adjacent to the south within the City and residential uses located adjacent to the west within the County. As the closest sensitive receptor distance within the look-up table is 25 meters, the SCAQMD recommends projects with boundaries located nearer than 25 meters from the nearest receptor use the LSTs at 25 meters.6 Table 6: Local Significance Thresholds for Construction and Operations summarizes the LSTs for 1-acre, 2- acre, and 5-acre projects in SCAQMD SRA 11 with sensitive receptors located within 25 meters of the Project Site. Table 6: Local Significance Thresholds for Construction and Operations Daily Acres Disturbed/ Project Size Maximum Emissions (pounds per day) Construction1 Operations1 NOx CO PM10 PM2.5 NOx CO PM10 PM2.5 1-acre 83 673 5 4 83 673 1 1 2-acres 121 1,031 7 5 121 1,031 2 2 5-acres 183 1,814 14 9 183 1,814 4 2 NOX = nitrogen oxides; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. Thresholds are for projects located within SRA 11 (South San Gabriel Valley) and 25 meters of a sensitive receptor. Source: South Coast Air Quality Management District, Localized Significance Threshold Methodology, 2008. LSTs associated with all acreage categories are provided in Table 6 for informational purposes and to demonstrate the LSTs increase as acreages increase. It should be noted that LSTs are screening thresholds and are therefore conservative. The construction LST acreage is determined based on the daily acreage disturbed by the Project. LST analysis for construction is required for all projects that disturb 5-acres or less on a single day. The operational LST acreage is based on the total area of the Project Site. 6 South Coast Air Quality Management District, Final Localized Significance Threshold Methodology. Kimley»Horn page 15 Localized Significance Threshold The SCAQMD developed the LSTs for emissions of NO,, CO, PM10, and PM2.5 in response to the SCAQMD Governing Boards' Environmental Justice Enhancement Initiative (1-4). The SCAQMD provided the Final Localized Significance Threshold Methodology (dated June 2003 [revised 2008]) to assist lead agencies in analyzing localized impacts associated with project-specific emissions. LSTs represent the maximum emissions that can be generated at the Project Site that are not expected to cause or substantially contribute to an exceedance of the most stringent CAAQS or NAAQS. LSTs are based on the ambient concentrations of that pollutant within the Project SRA, as demarcated by the SCAQMD, the distance to the nearest sensitive receptor, and the Project Site acreage. The SCAQMD’s Localized Significance Threshold Methodology provides on-site mass emissions rate look-up tables. The Project Site is located within SCAQMD SRA 11 (South San Gabriel Valley). LSTs are provided for source-receptor distances of 25, 50, 100, 200, and 500 meters. The nearest sensitive receptors to the Project Site are the University of the West located adjacent to the south within the City and residential uses located adjacent to the west within the County. As the closest sensitive receptor distance within the look-up table is 25 meters, the SCAQMD recommends projects with boundaries located nearer than 25 meters from the nearest receptor use the LSTs at 25 meters.® Table 6: Local Significance Thresholds for Construction and Operations summarizes the LSTs for 1-acre, 2- acre, and 5-acre projects in SCAQMD SRA 11 with sensitive receptors located within 25 meters of the Project Site. Table 6: Local Significance Thresholds for Construction and Operations Daily Acres Maximum Emissions (pounds per day) Disturbed/ Construction? Operations! Project Size NO, co PM10 PM2.5 NO, co PM10 PM2.5 1 1-acre 83 673 5 4 83 673 1 1 2-acres 121 1,031 7 5 121 1,031 2 2 5-acres 183 1,814 14 9 183 1,814 4 2 NOx = nitrogen oxides; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. Thresholds are for projects located within SRA 11 (South San Gabriel Valley) and 25 meters of a sensitive receptor. Source: South Coast Air Quality Management District, Localized Significance Threshold Methodology, 2008. LSTs associated with all acreage categories are provided in Table 6 for informational purposes and to demonstrate the LSTs increase as acreages increase. It should be noted that LSTs are screening thresholds and are therefore conservative. The construction LST acreage is determined based on the daily acreage disturbed by the Project. LST analysis for construction is required for all projects that disturb 5-acres or less on a single day. The operational LST acreage is based on the total area of the Project Site. 6 South Coast Air Quality Management District, Final Localized Significance Threshold Methodology. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 15 Localized Significance Threshold The SCAQMD developed the LSTs for emissions of NO,, CO, PM10, and PM2.5 in response to the SCAQMD Governing Boards' Environmental Justice Enhancement Initiative (1-4). The SCAQMD provided the Final Localized Significance Threshold Methodology (dated June 2003 [revised 2008]) to assist lead agencies in analyzing localized impacts associated with project-specific emissions. LSTs represent the maximum emissions that can be generated at the Project Site that are not expected to cause or substantially contribute to an exceedance of the most stringent CAAQS or NAAQS. LSTs are based on the ambient concentrations of that pollutant within the Project SRA, as demarcated by the SCAQMD, the distance to the nearest sensitive receptor, and the Project Site acreage. The SCAQMD’s Localized Significance Threshold Methodology provides on-site mass emissions rate look-up tables. The Project Site is located within SCAQMD SRA 11 (South San Gabriel Valley). LSTs are provided for source-receptor distances of 25, 50, 100, 200, and 500 meters. The nearest sensitive receptors to the Project Site are the University of the West located adjacent to the south within the City and residential uses located adjacent to the west within the County. As the closest sensitive receptor distance within the look-up table is 25 meters, the SCAQMD recommends projects with boundaries located nearer than 25 meters from the nearest receptor use the LSTs at 25 meters.® Table 6: Local Significance Thresholds for Construction and Operations summarizes the LSTs for 1-acre, 2- acre, and 5-acre projects in SCAQMD SRA 11 with sensitive receptors located within 25 meters of the Project Site. Table 6: Local Significance Thresholds for Construction and Operations Daily Acres Maximum Emissions (pounds per day) Disturbed/ Construction? Operations! Project Size NO, co PM10 PM2.5 NO, co PM10 PM2.5 1 1-acre 83 673 5 4 83 673 1 1 2-acres 121 1,031 7 5 121 1,031 2 2 5-acres 183 1,814 14 9 183 1,814 4 2 NOx = nitrogen oxides; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. Thresholds are for projects located within SRA 11 (South San Gabriel Valley) and 25 meters of a sensitive receptor. Source: South Coast Air Quality Management District, Localized Significance Threshold Methodology, 2008. LSTs associated with all acreage categories are provided in Table 6 for informational purposes and to demonstrate the LSTs increase as acreages increase. It should be noted that LSTs are screening thresholds and are therefore conservative. The construction LST acreage is determined based on the daily acreage disturbed by the Project. LST analysis for construction is required for all projects that disturb 5-acres or less on a single day. The operational LST acreage is based on the total area of the Project Site. 6 South Coast Air Quality Management District, Final Localized Significance Threshold Methodology. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 16 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Localized Carbon Monoxide In addition to the daily thresholds listed above, development associated with the Project would also be subject to the CAAQS and NAAQS. These are addressed through an analysis of localized CO impacts known as the CO “hot spots” analysis, which determines whether the change in the level of service of an intersection as a result of the Project would have the potential to result in exceedances of the CAAQS or NAAQS. The 2003 AQMP is the most recent AQMP that addressed CO concentrations. As part of the 2003 AQMP CO Modeling Attainment Demonstration, an analysis was performed utilizing dispersion modeling.7 As an initial screening step, if the average daily traffic (ADT) along a roadway segment within the Project area would not exceed a threshold of 100,000 per day, then the project would not need to prepare a detailed CO hot spot analysis. Methodology Project construction and operational emissions for on-site development and off-site sidewalk improvements were calculated using the using the CARB-approved California Emissions Estimator Model (CalEEMod) version 2022.1. CalEEMod is a Statewide land use emissions computer model designed to quantify potential criteria pollutant emissions associated with construction and operations from a variety of land use projects. Project construction would generate emissions from construction equipment, trucks, worker vehicles, and ground-disturbing activities. Daily regional construction emissions for the on-site development and off-site improvements were estimated by assuming construction occurs at the earliest feasible date (i.e., a conservative estimate of construction activities) and applying off-road, fugitive dust, and on-road emissions factors in CalEEMod. Project operations would result in emissions from mobile sources (motor vehicles from Project- generated vehicle trips), area sources (hearths, consumer products, architectural coatings, and landscape maintenance equipment), and energy sources (electricity and non-hearth natural gas usage). The mobile source emissions were estimated in CalEEMod based on the Project vehicle trip generation from the Traffic Study prepared by Kimley-Horn.8 Other operational emissions from area and energy sources were quantified in CalEEMod based on land use activity data. Air quality impacts were assessed according to methodologies recommended by CARB and the SCAQMD. 7 South Coast Air Quality Management District, Air Quality Management Plan, Appendix V, Modeling and Attainment Demonstrations, 2003, https://www.aqmd.gov/home/air-quality/air-quality-management-plans/air-quality-mgt-plan/2003-aqmp. Accessed August 27, 2025. 8 Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. Kimley»Horn page 16 Localized Carbon Monoxide In addition to the daily thresholds listed above, development associated with the Project would also be subject to the CAAQS and NAAQS. These are addressed through an analysis of localized CO impacts known as the CO “hot spots” analysis, which determines whether the change in the level of service of an intersection as a result of the Project would have the potential to result in exceedances of the CAAQS or NAAQS. The 2003 AQMP is the most recent AQMP that addressed CO concentrations. As part of the 2003 AQMP CO Modeling Attainment Demonstration, an analysis was performed utilizing dispersion modeling.” As an initial screening step, if the average daily traffic (ADT) along a roadway segment within the Project area would not exceed a threshold of 100,000 per day, then the project would not need to prepare a detailed CO hot spot analysis. Methodology Project construction and operational emissions for on-site development and off-site sidewalk improvements were calculated using the using the CARB-approved California Emissions Estimator Model (CalEEMod) version 2022.1. CalEEMod is a Statewide land use emissions computer model designed to quantify potential criteria pollutant emissions associated with construction and operations from a variety of land use projects. Project construction would generate emissions from construction equipment, trucks, worker vehicles, and ground-disturbing activities. Daily regional construction emissions for the on-site development and off-site improvements were estimated by assuming construction occurs at the earliest feasible date (i.e., a conservative estimate of construction activities) and applying off-road, fugitive dust, and on-road emissions factors in CalEEMod. Project operations would result in emissions from mobile sources (motor vehicles from Project- generated vehicle trips), area sources (hearths, consumer products, architectural coatings, and landscape maintenance equipment), and energy sources (electricity and non-hearth natural gas usage). The mobile source emissions were estimated in CalEEMod based on the Project vehicle trip generation from the Traffic Study prepared by Kimley-Horn.® Other operational emissions from area and energy sources were quantified in CalEEMod based on land use activity data. Air quality impacts were assessed according to methodologies recommended by CARB and the SCAQMD. 7 South Coast Air Quality Management District, Air Quality Management Plan, Appendix V, Modeling and Attainment Demonstrations, 2003, https://www.agmd.gov/home/air-quality/air-quality-management-plans/air-quality-mgt-plan/2003-agmp. Accessed August 27, 2025. & Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 16 Localized Carbon Monoxide In addition to the daily thresholds listed above, development associated with the Project would also be subject to the CAAQS and NAAQS. These are addressed through an analysis of localized CO impacts known as the CO “hot spots” analysis, which determines whether the change in the level of service of an intersection as a result of the Project would have the potential to result in exceedances of the CAAQS or NAAQS. The 2003 AQMP is the most recent AQMP that addressed CO concentrations. As part of the 2003 AQMP CO Modeling Attainment Demonstration, an analysis was performed utilizing dispersion modeling.” As an initial screening step, if the average daily traffic (ADT) along a roadway segment within the Project area would not exceed a threshold of 100,000 per day, then the project would not need to prepare a detailed CO hot spot analysis. Methodology Project construction and operational emissions for on-site development and off-site sidewalk improvements were calculated using the using the CARB-approved California Emissions Estimator Model (CalEEMod) version 2022.1. CalEEMod is a Statewide land use emissions computer model designed to quantify potential criteria pollutant emissions associated with construction and operations from a variety of land use projects. Project construction would generate emissions from construction equipment, trucks, worker vehicles, and ground-disturbing activities. Daily regional construction emissions for the on-site development and off-site improvements were estimated by assuming construction occurs at the earliest feasible date (i.e., a conservative estimate of construction activities) and applying off-road, fugitive dust, and on-road emissions factors in CalEEMod. Project operations would result in emissions from mobile sources (motor vehicles from Project- generated vehicle trips), area sources (hearths, consumer products, architectural coatings, and landscape maintenance equipment), and energy sources (electricity and non-hearth natural gas usage). The mobile source emissions were estimated in CalEEMod based on the Project vehicle trip generation from the Traffic Study prepared by Kimley-Horn.® Other operational emissions from area and energy sources were quantified in CalEEMod based on land use activity data. Air quality impacts were assessed according to methodologies recommended by CARB and the SCAQMD. 7 South Coast Air Quality Management District, Air Quality Management Plan, Appendix V, Modeling and Attainment Demonstrations, 2003, https://www.agmd.gov/home/air-quality/air-quality-management-plans/air-quality-mgt-plan/2003-agmp. Accessed August 27, 2025. & Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 17 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Air Quality Impacts Threshold (a) Would the project conflict with or obstruct implementation of the applicable air quality plan? As stated above, the Project is located within the SoCAB and is under the jurisdiction of the SCAQMD. Pursuant to the FCAA, the SCAQMD is required to reduce emissions of criteria pollutants for which the SoCAB is in nonattainment. To reduce such emissions, the SCAQMD drafted the 2016 AQMP and 2022 AQMP (AQMPs).9 The AQMPs establish a program of rules and regulations directed at reducing air pollutant emissions and achieving CAAQS and NAAQS. The AQMPs are a regional and multi-agency effort including the SCAQMD, CARB, SCAG, and U.S. EPA. The AQMPs’ pollutant control strategies are based on the latest scientific and technical information and planning assumptions, including the Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS), and updated emission inventory methodologies for various source categories, and SCAG’s latest growth forecasts. SCAG’s latest growth forecasts were defined in consultation with local governments and with reference to local general plans. Criteria for determining consistency with the AQMPs are defined by the following indicators: • Consistency Criterion No. 1: The project will not result in an increase in the frequency or severity of existing air quality violations, or cause or contribute to new violations, or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMPs. • Consistency Criterion No. 2: The project will not exceed the assumptions in the AQMPs or increments based on the years of the project build-out phase. According to the SCAQMD’s CEQA Air Quality Handbook, the purpose of the consistency finding is to determine if a project is inconsistent with the assumptions and objectives of the regional air quality plans, and thus if it would interfere with the region’s ability to comply with CAAQS and NAAQS.10 The violations to which Consistency Criterion No. 1 refers to are exceedances of the CAAQS or NAAQS. As shown below, Project construction- and operational-related emissions would not exceed the respective SCAQMD thresholds. As such, the Project would not result in an increase in frequency or severity of existing air quality violations, or cause or contribute to new violations, or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMPs. Therefore, the Project would be consistent with the first criterion. Concerning Consistency Criterion No. 2, the 2022 AQMP contains air pollutant reduction strategies based on SCAG’s growth forecasts included in the 2020-2045 RTP/SCS. SCAG’s growth forecasts were defined in consultation with local governments and with reference to local general plans. The Project Site is currently designated as Office/Light Industrial and zoned Medium Commercial with a Design Overlay. Residential use developments are not permitted under the Project Site’s existing designation 9 The 2016 AQMP (adopted in March 2017) was developed to address attainment of multiple O3 and PM2.5 standards. The 2022 AQMP (adopted in December 2022), was developed to address attainment of the 2015 8-hour O3 standard. 10 South Coast Air Quality Management District, CEQA Air Quality Handbook, 1993. Kimley»Horn Page17 Air Quality Impacts Threshold (a) Would the project conflict with or obstruct implementation of the applicable air quality plan? As stated above, the Project is located within the SoCAB and is under the jurisdiction of the SCAQMD. Pursuant to the FCAA, the SCAQMD is required to reduce emissions of criteria pollutants for which the SoCAB is in nonattainment. To reduce such emissions, the SCAQMD drafted the 2016 AQMP and 2022 AQMP (AQMPs).° The AQMPs establish a program of rules and regulations directed at reducing air pollutant emissions and achieving CAAQS and NAAQS. The AQMPs are a regional and multi-agency effort including the SCAQMD, CARB, SCAG, and U.S. EPA. The AQMPs’ pollutant control strategies are based on the latest scientific and technical information and planning assumptions, including the Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS), and updated emission inventory methodologies for various source categories, and SCAG’s latest growth forecasts. SCAG’s latest growth forecasts were defined in consultation with local governments and with reference to local general plans. Criteria for determining consistency with the AQMPs are defined by the following indicators: e Consistency Criterion No. 1: The project will not result in an increase in the frequency or severity of existing air quality violations, or cause or contribute to new violations, or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMPs. eo Consistency Criterion No. 2: The project will not exceed the assumptions in the AQMPs or increments based on the years of the project build-out phase. According to the SCAQMD’s CEQA Air Quality Handbook, the purpose of the consistency finding is to determine if a project is inconsistent with the assumptions and objectives of the regional air quality plans, and thus if it would interfere with the region’s ability to comply with CAAQS and NAAQS.’ The violations to which Consistency Criterion No. 1 refers to are exceedances of the CAAQS or NAAQS. As shown below, Project construction- and operational-related emissions would not exceed the respective SCAQMD thresholds. As such, the Project would not result in an increase in frequency or severity of existing air quality violations, or cause or contribute to new violations, or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMPs. Therefore, the Project would be consistent with the first criterion. Concerning Consistency Criterion No. 2, the 2022 AQMP contains air pollutant reduction strategies based on SCAG’s growth forecasts included in the 2020-2045 RTP/SCS. SCAG’s growth forecasts were defined in consultation with local governments and with reference to local general plans. The Project Site is currently designated as Office/Light Industrial and zoned Medium Commercial with a Design Overlay. Residential use developments are not permitted under the Project Site’s existing designation 2 The 2016 AQMP (adopted in March 2017) was developed to address attainment of multiple Os and PM2.5 standards. The 2022 AQMP (adopted in December 2022), was developed to address attainment of the 2015 8-hour Os standard. 10 South Coast Air Quality Management District, CEQA Air Quality Handbook, 1993. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page17 Air Quality Impacts Threshold (a) Would the project conflict with or obstruct implementation of the applicable air quality plan? As stated above, the Project is located within the SoCAB and is under the jurisdiction of the SCAQMD. Pursuant to the FCAA, the SCAQMD is required to reduce emissions of criteria pollutants for which the SoCAB is in nonattainment. To reduce such emissions, the SCAQMD drafted the 2016 AQMP and 2022 AQMP (AQMPs).° The AQMPs establish a program of rules and regulations directed at reducing air pollutant emissions and achieving CAAQS and NAAQS. The AQMPs are a regional and multi-agency effort including the SCAQMD, CARB, SCAG, and U.S. EPA. The AQMPs’ pollutant control strategies are based on the latest scientific and technical information and planning assumptions, including the Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS), and updated emission inventory methodologies for various source categories, and SCAG’s latest growth forecasts. SCAG’s latest growth forecasts were defined in consultation with local governments and with reference to local general plans. Criteria for determining consistency with the AQMPs are defined by the following indicators: e Consistency Criterion No. 1: The project will not result in an increase in the frequency or severity of existing air quality violations, or cause or contribute to new violations, or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMPs. eo Consistency Criterion No. 2: The project will not exceed the assumptions in the AQMPs or increments based on the years of the project build-out phase. According to the SCAQMD’s CEQA Air Quality Handbook, the purpose of the consistency finding is to determine if a project is inconsistent with the assumptions and objectives of the regional air quality plans, and thus if it would interfere with the region’s ability to comply with CAAQS and NAAQS.’ The violations to which Consistency Criterion No. 1 refers to are exceedances of the CAAQS or NAAQS. As shown below, Project construction- and operational-related emissions would not exceed the respective SCAQMD thresholds. As such, the Project would not result in an increase in frequency or severity of existing air quality violations, or cause or contribute to new violations, or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMPs. Therefore, the Project would be consistent with the first criterion. Concerning Consistency Criterion No. 2, the 2022 AQMP contains air pollutant reduction strategies based on SCAG’s growth forecasts included in the 2020-2045 RTP/SCS. SCAG’s growth forecasts were defined in consultation with local governments and with reference to local general plans. The Project Site is currently designated as Office/Light Industrial and zoned Medium Commercial with a Design Overlay. Residential use developments are not permitted under the Project Site’s existing designation 2 The 2016 AQMP (adopted in March 2017) was developed to address attainment of multiple Os and PM2.5 standards. The 2022 AQMP (adopted in December 2022), was developed to address attainment of the 2015 8-hour Os standard. 10 South Coast Air Quality Management District, CEQA Air Quality Handbook, 1993. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 18 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 and zoning. Therefore, the Project proposes a General Plan Amendment to alter the existing designation from Office/Light Industrial to High Density Residential and existing zoning from Medium Commercial to Planned Development. The 2020-2045 RTP/SCS was adopted by SCAG on September 3, 2020. Growth forecasts prepared by SCAG and contained in the 2020-2045 RTP/SCS indicate that the population within the City would increase from 55,000 persons in 2016 to 60,300 persons in 2050, an increase of 5,300 persons.11 Based on an average household size of 3.8, the Project would develop 191 dwelling units and would result in population growth of approximately 726 persons.12 The Project would represent approximately 13.7 percent of the anticipated population increase for the City by 2045. The household and population growth attributed to the Project would be consistent with the Housing Element. Therefore, the Project would be consistent with the City’s General Plan and the growth attributed to the Project would be accounted for in future SCAG growth projections. Additionally, the development of residential uses in proximity to transit services and employment opportunities would reduce the associated vehicle miles traveled (VMT) and vehicle emissions in comparison to a project located in a non-urban environment. As such, the Project would be generally consistent with the emissions forecasts in the AQMPs and AQMP control measures. LSTs were developed to ensure no exceedances of the CAAQS or NAAQS would occur if regional project emissions were below thresholds.13 As shown below, the localized emissions resulting from Project implementation would not exceed the SCAQMD’s LSTs. As the Project would not increase the frequency or severity of an existing air quality violation or cause or contribute to new violations for air quality pollutants (including ROG, NOX, CO, SOX, PM10, and PM2.5), the Project would not delay timely attainment of air quality standards or interim emission reductions specified in the AQMPs. Therefore, the Project would be consistent with the second criterion and SCAQMD consistency finding criteria. As such, impacts would be less than significant, and no mitigation is required. Threshold (b) Would the project result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable state or federal ambient air quality standard? As shown in Table 4 above, the SoCAB is classified as nonattainment of the applicable NAAQS and or CAAQS for pollutants: O3 (precursor pollutants ROG and NOX), PM10, PM2.5, and lead (for the Los Angeles County portion only, and is expected to be redesignated to attainment based on recent monitoring).14 The SoCAB is classified as attainment, maintenance, or unclassifiable for all other 11 Southern California Association of Governments, Connect SoCal 2024, Demographics and Growth Forecast, 2024, https://www.scag.ca.gov/sites/default/files/2024-05/23-2987-tr-demographics-growth-forecast-final-040424.pdf. Accessed August 12, 2025. 12 Southern California Association of Governments, Rosemead Local Profiles Report, 2019, https://cdnsm5-hosted.civiclive.com/UserFiles/Servers/Server_10034989/File/Gov/City%20Departments/Community%20Development/Planning/Housi ng%20Element/Adopted%20Rosemead%202021-2029%20Housing%20Element_CERTIFIED%20080122.pdf. Accessed August 12, 2025. 13 South Coast Air Quality Management District, Localized Significance Thresholds, https://www.aqmd.gov/home/rules- compliance/ceqa/air-quality-analysis-handbook/localized-significance-thresholds. Accessed August 12, 2025. 14 South Coast Air Quality Management District, National Ambient Air Quality Standards (NAAQS) and California Ambient Air Quality Standards (CAAQS) Attainment Status for South Coast Air Basin, https://www.aqmd.gov/docs/default-source/clean-air-plans/air-quality- management-plans/naaqs-caaqs-feb2016.pdf?sfvrsn=23. Accessed August 12, 2025. Kimley»Horn page 18 and zoning. Therefore, the Project proposes a General Plan Amendment to alter the existing designation from Office/Light Industrial to High Density Residential and existing zoning from Medium Commercial to Planned Development. The 2020-2045 RTP/SCS was adopted by SCAG on September 3, 2020. Growth forecasts prepared by SCAG and contained in the 2020-2045 RTP/SCS indicate that the population within the City would increase from 55,000 persons in 2016 to 60,300 persons in 2050, an increase of 5,300 persons.! Based on an average household size of 3.8, the Project would develop 191 dwelling units and would result in population growth of approximately 726 persons.? The Project would represent approximately 13.7 percent of the anticipated population increase for the City by 2045. The household and population growth attributed to the Project would be consistent with the Housing Element. Therefore, the Project would be consistent with the City’s General Plan and the growth attributed to the Project would be accounted for in future SCAG growth projections. Additionally, the development of residential uses in proximity to transit services and employment opportunities would reduce the associated vehicle miles traveled (VMT) and vehicle emissions in comparison to a project located in a non-urban environment. As such, the Project would be generally consistent with the emissions forecasts in the AQMPs and AQMP control measures. LSTs were developed to ensure no exceedances of the CAAQS or NAAQS would occur if regional project emissions were below thresholds.?® As shown below, the localized emissions resulting from Project implementation would not exceed the SCAQMD’s LSTs. As the Project would not increase the frequency or severity of an existing air quality violation or cause or contribute to new violations for air quality pollutants (including ROG, NOx, CO, SOx, PM10, and PM2.5), the Project would not delay timely attainment of air quality standards or interim emission reductions specified in the AQMPs. Therefore, the Project would be consistent with the second criterion and SCAQMD consistency finding criteria. As such, impacts would be less than significant, and no mitigation is required. Threshold (b) Would the project result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable state or federal ambient air quality standard? As shown in Table 4 above, the SoCAB is classified as nonattainment of the applicable NAAQS and or CAAQS for pollutants: Os; (precursor pollutants ROG and NOx), PM10, PM2.5, and lead (for the Los Angeles County portion only, and is expected to be redesignated to attainment based on recent monitoring).2* The SoCAB is classified as attainment, maintenance, or unclassifiable for all other 11 Southern California Association of Governments, Connect SoCal 2024, Demographics and Growth Forecast, 2024, https://www.scag.ca.gov/sites/default/files/2024-05/23-2987-tr-demographics-growth-forecast-final-040424.pdf. Accessed August 12, 2025. 12 Southern California Association of Governments, Rosemead Local Profiles Report, 2019, https://cdnsm5- hosted.civiclive.com/UserFiles/Servers/Server_10034989/File/Gov/City%20Departments/Community%20Development/Planning/Housi ng%20Element/Adopted%20Rosemead%202021-2029%20Housing%20Element_CERTIFIED%20080122.pdf. Accessed August 12, 2025. 13 South Coast Air Quality Management District, Localized Significance Thresholds, https://www.agmd.gov/home/rules- compliance/ceqa/air-quality-analysis-handbook/localized-significance-thresholds. Accessed August 12, 2025. 14 South Coast Air Quality Management District, National Ambient Air Quality Standards (NAAQS) and California Ambient Air Quality Standards (CAAQS) Attainment Status for South Coast Air Basin, https://www.agmd.gov/docs/default-source/clean-air-plans/air-quality- management-plans/naaqgs-caaqs-feb2016.pdf?sfvrsn=23. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 18 and zoning. Therefore, the Project proposes a General Plan Amendment to alter the existing designation from Office/Light Industrial to High Density Residential and existing zoning from Medium Commercial to Planned Development. The 2020-2045 RTP/SCS was adopted by SCAG on September 3, 2020. Growth forecasts prepared by SCAG and contained in the 2020-2045 RTP/SCS indicate that the population within the City would increase from 55,000 persons in 2016 to 60,300 persons in 2050, an increase of 5,300 persons.! Based on an average household size of 3.8, the Project would develop 191 dwelling units and would result in population growth of approximately 726 persons.? The Project would represent approximately 13.7 percent of the anticipated population increase for the City by 2045. The household and population growth attributed to the Project would be consistent with the Housing Element. Therefore, the Project would be consistent with the City’s General Plan and the growth attributed to the Project would be accounted for in future SCAG growth projections. Additionally, the development of residential uses in proximity to transit services and employment opportunities would reduce the associated vehicle miles traveled (VMT) and vehicle emissions in comparison to a project located in a non-urban environment. As such, the Project would be generally consistent with the emissions forecasts in the AQMPs and AQMP control measures. LSTs were developed to ensure no exceedances of the CAAQS or NAAQS would occur if regional project emissions were below thresholds.?® As shown below, the localized emissions resulting from Project implementation would not exceed the SCAQMD’s LSTs. As the Project would not increase the frequency or severity of an existing air quality violation or cause or contribute to new violations for air quality pollutants (including ROG, NOx, CO, SOx, PM10, and PM2.5), the Project would not delay timely attainment of air quality standards or interim emission reductions specified in the AQMPs. Therefore, the Project would be consistent with the second criterion and SCAQMD consistency finding criteria. As such, impacts would be less than significant, and no mitigation is required. Threshold (b) Would the project result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable state or federal ambient air quality standard? As shown in Table 4 above, the SoCAB is classified as nonattainment of the applicable NAAQS and or CAAQS for pollutants: Os; (precursor pollutants ROG and NOx), PM10, PM2.5, and lead (for the Los Angeles County portion only, and is expected to be redesignated to attainment based on recent monitoring).2* The SoCAB is classified as attainment, maintenance, or unclassifiable for all other 11 Southern California Association of Governments, Connect SoCal 2024, Demographics and Growth Forecast, 2024, https://www.scag.ca.gov/sites/default/files/2024-05/23-2987-tr-demographics-growth-forecast-final-040424.pdf. Accessed August 12, 2025. 12 Southern California Association of Governments, Rosemead Local Profiles Report, 2019, https://cdnsm5- hosted.civiclive.com/UserFiles/Servers/Server_10034989/File/Gov/City%20Departments/Community%20Development/Planning/Housi ng%20Element/Adopted%20Rosemead%202021-2029%20Housing%20Element_CERTIFIED%20080122.pdf. Accessed August 12, 2025. 13 South Coast Air Quality Management District, Localized Significance Thresholds, https://www.agmd.gov/home/rules- compliance/ceqa/air-quality-analysis-handbook/localized-significance-thresholds. Accessed August 12, 2025. 14 South Coast Air Quality Management District, National Ambient Air Quality Standards (NAAQS) and California Ambient Air Quality Standards (CAAQS) Attainment Status for South Coast Air Basin, https://www.agmd.gov/docs/default-source/clean-air-plans/air-quality- management-plans/naaqgs-caaqs-feb2016.pdf?sfvrsn=23. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 19 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 criteria pollutants. Nonetheless, the analysis below discloses emissions and applicable thresholds for O3 precursors (ROG and NOX), CO, and SO2, PM10, and PM2.5. Emissions of lead, hydrogen sulfide, sulfates, and vinyl chloride would be minimal from the construction and operation of a residential use and are not reported. Regional Construction Emissions Project construction would generate short-term emissions of criteria air pollutants. The criteria pollutants of primary concern within the Project area include ozone- precursor pollutants (i.e., ROG and NOX), PM10, and PM2.5. Construction-generated emissions are short term and of temporary duration, lasting only as long as construction activities occur, but would be considered a significant air quality impact if the pollutant emissions generated exceeded the SCAQMD’s thresholds of significance. Sources of emissions during construction include motor vehicle exhaust associated with construction equipment and worker trips and the movement of construction equipment, especially on unpaved surfaces. Emissions of airborne particulate matter are largely dependent on the amount of ground disturbance associated with site preparation and grading activities, as well as weather conditions and the appropriate application of water. Project construction is anticipated to occur over approximately 34 months, beginning as early as October 2026 and ending as early as August 2029. Project construction includes demolition, sitewide vegetation and natural material removal (site preparation), grading, infrastructure improvements, building construction, paving, and architectural coating applications, as well as off-site infrastructure improvements (i.e., sidewalk improvements and grind and overlay of Walnut Grove Avenue along the Project Site frontage). Project construction-generated emissions associated with on-site development and off-site improvements were calculated using CalEEMod, which is designed to model emissions for land use development projects based on typical construction requirements. It is conservatively assumed that the demolition haul mileage would be the worst-case disposal site distance, and the anticipated construction equipment would operate simultaneously during each construction phase. Fugitive dust emissions from construction may temporarily become a nuisance and potential health hazard to those living and working nearby. Project construction would comply with SCAQMD rules and regulations, including SCAQMD Rule 402 (Nuisance), Rule 403 (Fugitive Dust), and Rule 1113 (Architectural Coatings). SCAQMD Rule 402 (Nuisance) prohibits the discharge of air contaminants or other material that cause a nuisance. SCAQMD Rule 403 (Fugitive Dust) requires fugitive dust control measures. SCAQMD Rule 1113 (Architectural Coatings) provides specifications on painting practices and regulates the ROG content of paint. Project construction would additionally comply with CARB’s anti-idling regulations, which prohibits heavy-duty diesel vehicle idling for more than five minutes. SCAQMD Rule 403 was applied in CalEEMod to reduce fugitive dust emissions. See Appendix A: Air Quality Modeling Data for more information regarding the construction assumptions used in this analysis. Table 7: Project Construction Emissions summarizes the short-term construction emissions attributable to the Project. Kimley»Horn page 19 criteria pollutants. Nonetheless, the analysis below discloses emissions and applicable thresholds for Os precursors (ROG and NOx), CO, and SO,, PM10, and PM2.5. Emissions of lead, hydrogen sulfide, sulfates, and vinyl chloride would be minimal from the construction and operation of a residential use and are not reported. Regional Construction Emissions Project construction would generate short-term emissions of criteria air pollutants. The criteria pollutants of primary concern within the Project area include ozone- precursor pollutants (i.e., ROG and NOx), PM10, and PM2.5. Construction-generated emissions are short term and of temporary duration, lasting only as long as construction activities occur, but would be considered a significant air quality impact if the pollutant emissions generated exceeded the SCAQMD’s thresholds of significance. Sources of emissions during construction include motor vehicle exhaust associated with construction equipment and worker trips and the movement of construction equipment, especially on unpaved surfaces. Emissions of airborne particulate matter are largely dependent on the amount of ground disturbance associated with site preparation and grading activities, as well as weather conditions and the appropriate application of water. Project construction is anticipated to occur over approximately 34 months, beginning as early as October 2026 and ending as early as August 2029. Project construction includes demolition, sitewide vegetation and natural material removal (site preparation), grading, infrastructure improvements, building construction, paving, and architectural coating applications, as well as off-site infrastructure improvements (i.e., sidewalk improvements and grind and overlay of Walnut Grove Avenue along the Project Site frontage). Project construction-generated emissions associated with on-site development and off-site improvements were calculated using CalEEMod, which is designed to model emissions for land use development projects based on typical construction requirements. It is conservatively assumed that the demolition haul mileage would be the worst-case disposal site distance, and the anticipated construction equipment would operate simultaneously during each construction phase. Fugitive dust emissions from construction may temporarily become a nuisance and potential health hazard to those living and working nearby. Project construction would comply with SCAQMD rules and regulations, including SCAQMD Rule 402 (Nuisance), Rule 403 (Fugitive Dust), and Rule 1113 (Architectural Coatings). SCAQMD Rule 402 (Nuisance) prohibits the discharge of air contaminants or other material that cause a nuisance. SCAQMD Rule 403 (Fugitive Dust) requires fugitive dust control measures. SCAQMD Rule 1113 (Architectural Coatings) provides specifications on painting practices and regulates the ROG content of paint. Project construction would additionally comply with CARB’s anti-idling regulations, which prohibits heavy-duty diesel vehicle idling for more than five minutes. SCAQMD Rule 403 was applied in CalEEMod to reduce fugitive dust emissions. See Appendix A: Air Quality Modeling Data for more information regarding the construction assumptions used in this analysis. Table 7: Project Construction Emissions summarizes the short-term construction emissions attributable to the Project. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page 19 criteria pollutants. Nonetheless, the analysis below discloses emissions and applicable thresholds for Os precursors (ROG and NOx), CO, and SO,, PM10, and PM2.5. Emissions of lead, hydrogen sulfide, sulfates, and vinyl chloride would be minimal from the construction and operation of a residential use and are not reported. Regional Construction Emissions Project construction would generate short-term emissions of criteria air pollutants. The criteria pollutants of primary concern within the Project area include ozone- precursor pollutants (i.e., ROG and NOx), PM10, and PM2.5. Construction-generated emissions are short term and of temporary duration, lasting only as long as construction activities occur, but would be considered a significant air quality impact if the pollutant emissions generated exceeded the SCAQMD’s thresholds of significance. Sources of emissions during construction include motor vehicle exhaust associated with construction equipment and worker trips and the movement of construction equipment, especially on unpaved surfaces. Emissions of airborne particulate matter are largely dependent on the amount of ground disturbance associated with site preparation and grading activities, as well as weather conditions and the appropriate application of water. Project construction is anticipated to occur over approximately 34 months, beginning as early as October 2026 and ending as early as August 2029. Project construction includes demolition, sitewide vegetation and natural material removal (site preparation), grading, infrastructure improvements, building construction, paving, and architectural coating applications, as well as off-site infrastructure improvements (i.e., sidewalk improvements and grind and overlay of Walnut Grove Avenue along the Project Site frontage). Project construction-generated emissions associated with on-site development and off-site improvements were calculated using CalEEMod, which is designed to model emissions for land use development projects based on typical construction requirements. It is conservatively assumed that the demolition haul mileage would be the worst-case disposal site distance, and the anticipated construction equipment would operate simultaneously during each construction phase. Fugitive dust emissions from construction may temporarily become a nuisance and potential health hazard to those living and working nearby. Project construction would comply with SCAQMD rules and regulations, including SCAQMD Rule 402 (Nuisance), Rule 403 (Fugitive Dust), and Rule 1113 (Architectural Coatings). SCAQMD Rule 402 (Nuisance) prohibits the discharge of air contaminants or other material that cause a nuisance. SCAQMD Rule 403 (Fugitive Dust) requires fugitive dust control measures. SCAQMD Rule 1113 (Architectural Coatings) provides specifications on painting practices and regulates the ROG content of paint. Project construction would additionally comply with CARB’s anti-idling regulations, which prohibits heavy-duty diesel vehicle idling for more than five minutes. SCAQMD Rule 403 was applied in CalEEMod to reduce fugitive dust emissions. See Appendix A: Air Quality Modeling Data for more information regarding the construction assumptions used in this analysis. Table 7: Project Construction Emissions summarizes the short-term construction emissions attributable to the Project. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 20 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Table 7: Project Construction Emissions Construction Year Maximum Daily Emissions (pounds per day)1,2 ROG NOX CO SO2 PM10 PM2.5 2026 0.53 15.50 9.64 0.08 7.00 1.62 2027 8.05 15.01 25.60 0.08 6.99 1.61 2028 7.96 13.19 25.03 0.03 2.84 0.94 2029 7.40 9.44 20.44 0.03 2.59 0.78 Maximum Daily Emissions 8.05 15.50 25.60 0.08 7.00 1.62 SCAQMD Threshold 75 100 550 150 150 55 SCAQMD Threshold Exceeded? No No No No No No ROG = reactive organic gases; NO2 = nitrogen dioxide; CO = carbon monoxide; SO2 = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. SCAQMD Rule 403 Fugitive Dust applied for construction emissions. SCAQMD Rule 403 reduction/credits include: properly maintain mobile and other construction equipment; replace ground cover in disturbed areas quickly; water exposed surfaces three times daily; water all haul roads three times daily; and limit speeds on unpaved roads to 15 miles per hour. Reductions percentages from the SCAQMD CEQA Handbook (Tables XI-A through XI-E) were applied. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. Table 7 shows the Project’s regional construction emissions would not exceed the respective SCAQMD threshold. Therefore, impacts would be less than significant, and no mitigation is required. Regional Operational Emissions Operational emissions would be primarily associated with mobile sources (motor vehicles from Project-generated vehicle trips), area sources (hearths, consumer products, architectural coatings, and landscape maintenance equipment), and energy emissions (electricity and non-hearth natural gas usage). Operational-generated emissions associated with the Project were calculated using CalEEMod, which is designed to model emissions based on land use activity data and the Project vehicle trip generation. The operational emissions sources are described in further detail below: • Mobile Source Emissions. Mobile sources are emissions from motor vehicles, including tailpipe and evaporative emissions. Depending upon the pollutant being discussed, the potential air quality impact may be of either regional or local concern. For example, ROG, NOX, PM10, and PM2.5 are all pollutants of regional concern. NOX and ROG react with sunlight to form O3, known as photochemical smog. Additionally, wind currents readily transport PM10 and PM2.5. However, CO tends to be a localized pollutant, dispersing rapidly at the source. Project-generated vehicle emissions are based on the trip generation estimates and have been incorporated into CalEEMod, as recommended by the SCAQMD. The Project would generate 1,375 total daily vehicle trips.15 • Area Source Emissions. Area source emissions would be generated due to hearths, consumer products, architectural coatings, and landscape maintenance equipment. The townhouses 15 Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. Kimley»Horn Page 20 poo 7: Project Construction Emissions . Maximum Daily Emissions (pounds per day)!Construction Year ROG NO, co sO, PM10 PM| 2026 0.53 15.50 9.64 0.08 7.00 1.62 2027 8.05 15.01 25.60 0.08 6.99 1.61 2028 7.96 13.19 25.03 0.03 2.84 0.94 2029 7.40 9.44 20.44 0.03 2.59 0.78 Maximum Daily Emissions 8.05 15.50 25.60 0.08 7.00 1.62 SCAQMD Threshold 75 100 550 150 150 55 SCAQMD Threshold Exceeded? No No No No No No ROG = reactive organic gases; NO; = nitrogen dioxide; CO = carbon monoxide; SO; = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. SCAQMD Rule 403 Fugitive Dust applied for construction emissions. SCAQMD Rule 403 reduction/credits include: properly maintain mobile and other construction equipment; replace ground cover in disturbed areas quickly; water exposed surfaces three times daily; water all haul roads three times daily; and limit speeds on unpaved roads to 15 miles per hour. Reductions percentages from the SCAQMD CEQA Handbook (Tables XI-A through XI-E) were applied. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. Table 7 shows the Project’s regional construction emissions would not exceed the respective SCAQMD threshold. Therefore, impacts would be less than significant, and no mitigation is required. Regional Operational Emissions Operational emissions would be primarily associated with mobile sources {motor vehicles from Project-generated vehicle trips), area sources (hearths, consumer products, architectural coatings, and landscape maintenance equipment), and energy emissions (electricity and non-hearth natural gas usage). Operational-generated emissions associated with the Project were calculated using CalEEMod, which is designed to model emissions based on land use activity data and the Project vehicle trip generation. The operational emissions sources are described in further detail below: * Mobile Source Emissions. Mobile sources are emissions from motor vehicles, including tailpipe and evaporative emissions. Depending upon the pollutant being discussed, the potential air quality impact may be of either regional or local concern. For example, ROG, NOx, PM10, and PM2.5 are all pollutants of regional concern. NOx and ROG react with sunlight to form Os, known as photochemical smog. Additionally, wind currents readily transport PM10 and PM2.5. However, CO tends to be a localized pollutant, dispersing rapidly at the source. Project-generated vehicle emissions are based on the trip generation estimates and have been incorporated into CalEEMod, as recommended by the SCAQMD. The Project would generate 1,375 total daily vehicle trips. e Area Source Emissions. Area source emissions would be generated due to hearths, consumer products, architectural coatings, and landscape maintenance equipment. The townhouses 15 Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page 20 poo 7: Project Construction Emissions . Maximum Daily Emissions (pounds per day)!Construction Year ROG NO, co sO, PM10 PM| 2026 0.53 15.50 9.64 0.08 7.00 1.62 2027 8.05 15.01 25.60 0.08 6.99 1.61 2028 7.96 13.19 25.03 0.03 2.84 0.94 2029 7.40 9.44 20.44 0.03 2.59 0.78 Maximum Daily Emissions 8.05 15.50 25.60 0.08 7.00 1.62 SCAQMD Threshold 75 100 550 150 150 55 SCAQMD Threshold Exceeded? No No No No No No ROG = reactive organic gases; NO; = nitrogen dioxide; CO = carbon monoxide; SO; = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. SCAQMD Rule 403 Fugitive Dust applied for construction emissions. SCAQMD Rule 403 reduction/credits include: properly maintain mobile and other construction equipment; replace ground cover in disturbed areas quickly; water exposed surfaces three times daily; water all haul roads three times daily; and limit speeds on unpaved roads to 15 miles per hour. Reductions percentages from the SCAQMD CEQA Handbook (Tables XI-A through XI-E) were applied. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. Table 7 shows the Project’s regional construction emissions would not exceed the respective SCAQMD threshold. Therefore, impacts would be less than significant, and no mitigation is required. Regional Operational Emissions Operational emissions would be primarily associated with mobile sources {motor vehicles from Project-generated vehicle trips), area sources (hearths, consumer products, architectural coatings, and landscape maintenance equipment), and energy emissions (electricity and non-hearth natural gas usage). Operational-generated emissions associated with the Project were calculated using CalEEMod, which is designed to model emissions based on land use activity data and the Project vehicle trip generation. The operational emissions sources are described in further detail below: * Mobile Source Emissions. Mobile sources are emissions from motor vehicles, including tailpipe and evaporative emissions. Depending upon the pollutant being discussed, the potential air quality impact may be of either regional or local concern. For example, ROG, NOx, PM10, and PM2.5 are all pollutants of regional concern. NOx and ROG react with sunlight to form Os, known as photochemical smog. Additionally, wind currents readily transport PM10 and PM2.5. However, CO tends to be a localized pollutant, dispersing rapidly at the source. Project-generated vehicle emissions are based on the trip generation estimates and have been incorporated into CalEEMod, as recommended by the SCAQMD. The Project would generate 1,375 total daily vehicle trips. e Area Source Emissions. Area source emissions would be generated due to hearths, consumer products, architectural coatings, and landscape maintenance equipment. The townhouses 15 Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 21 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 would be all-electric and would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood-burning devices in new land use developments. As such, the hearths would be all-electric and would not emit criteria pollutants. Consumer products are various solvents used in non-industrial applications, which emit VOCs during product use. These typically include cleaning supplies, kitchen aerosols, cosmetics, and toiletries. Area source emissions were calculated using CalEEMod default rates. • Energy Source Emissions. Energy source emissions would be generated due to electricity and non-hearth natural gas usage associated with the Project. Primary energy uses include space heating and cooling, water heating, ventilation, lighting, appliances, and electronics. As stated above, the townhouses would be all-electric and would comply with SCAQMD Rule 445 (Wood Burning). Electricity usage would not emit criteria pollutant emissions. The pool and spa would be heated utilizing natural gas. Natural gas emissions were calculated using CalEEMod default rates. Table 8: Project Operational Emissions summarizes the long-term operational emissions attributable to the Project. Table 8: Project Operational Emissions Source Maximum Daily Emissions (pounds per day)1 ROG NOX CO SO2 PM10 PM2.5 Mobile 3.98 3.06 34.06 0.09 8.44 2.18 Area2 10.00 0.10 10.86 <0.01 <0.01 <0.01 Energy 3 0.03 0.48 0.40 <0.01 0.04 0.04 Total Emissions4 14.01 3.64 45.32 0.09 8.48 2.22 SCAQMD Threshold 55 55 550 150 150 55 SCAQMD Threshold Exceeded? No No No No No No ROG = reactive organic gases; NO2 = nitrogen dioxide; CO = carbon monoxide; SO2 = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. The Project would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood burning devices in new developments. 3. The townhouses would be all-electric and would not include natural gas devices. Natural 4. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. As shown in Table 8, the Project’s regional operational emissions would not exceed the respective SCAQMD thresholds. Therefore, impacts would be less than significant, and no mitigation is required. Threshold (c) Would the Project expose sensitive receptors to substantial pollutant concentrations? Localized Construction Impacts LSTs represent the maximum emissions of NOX, CO, PM10, and PM2.5 generated at a Project Site that are not expected to cause or contribute to an exceedance of the CAAQS or NAAQS. The SCAQMD’s Kimley»Horn Page 21 would be all-electric and would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood-burning devices in new land use developments. As such, the hearths would be all-electric and would not emit criteria pollutants. Consumer products are various solvents used in non-industrial applications, which emit VOCs during product use. These typically include cleaning supplies, kitchen aerosols, cosmetics, and toiletries. Area source emissions were calculated using CalEEMod default rates. * Energy Source Emissions. Energy source emissions would be generated due to electricity and non-hearth natural gas usage associated with the Project. Primary energy uses include space heating and cooling, water heating, ventilation, lighting, appliances, and electronics. As stated above, the townhouses would be all-electric and would comply with SCAQMD Rule 445 {Wood Burning). Electricity usage would not emit criteria pollutant emissions. The pool and spa would be heated utilizing natural gas. Natural gas emissions were calculated using CalEEMod default rates. Table 8: Project Operational Emissions summarizes the long-term operational emissions attributable to the Project. Table 8: Project Operational Emissions Source Maximum Daily Emissions (pounds per day)! | ROG NOx co SO. PM10 rm2.59 Mobile 3.98 3.06 34.06 0.09 8.44 2.18 Area’ 10.00 0.10 10.86 <0.01 <0.01 <0.01 Energy? 0.03 0.48 0.40 <0.01 0.04 0.04 Total Emissions? 14.01 3.64 45.32 0.09 8.48 2.22 SCAQMD Threshold 55 55 550 150 150 55 SCAQMD Threshold Exceeded? No No No No No No ROG = reactive organic gases; NO; = nitrogen dioxide; CO = carbon monoxide; SO: = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. The Project would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood burning devices in new developments. 3. The townhouses would be all-electric and would not include natural gas devices. Natural 4. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. As shown in Table 8, the Project’s regional operational emissions would not exceed the respective SCAQMD thresholds. Therefore, impacts would be less than significant, and no mitigation is required. Threshold (c) Would the Project expose sensitive receptors to substantial pollutant concentrations? Localized Construction Impacts LSTs represent the maximum emissions of NOx, CO, PM10, and PM2.5 generated at a Project Site that are not expected to cause or contribute to an exceedance of the CAAQS or NAAQS. The SCAQMD’s kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page 21 would be all-electric and would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood-burning devices in new land use developments. As such, the hearths would be all-electric and would not emit criteria pollutants. Consumer products are various solvents used in non-industrial applications, which emit VOCs during product use. These typically include cleaning supplies, kitchen aerosols, cosmetics, and toiletries. Area source emissions were calculated using CalEEMod default rates. * Energy Source Emissions. Energy source emissions would be generated due to electricity and non-hearth natural gas usage associated with the Project. Primary energy uses include space heating and cooling, water heating, ventilation, lighting, appliances, and electronics. As stated above, the townhouses would be all-electric and would comply with SCAQMD Rule 445 {Wood Burning). Electricity usage would not emit criteria pollutant emissions. The pool and spa would be heated utilizing natural gas. Natural gas emissions were calculated using CalEEMod default rates. Table 8: Project Operational Emissions summarizes the long-term operational emissions attributable to the Project. Table 8: Project Operational Emissions Source Maximum Daily Emissions (pounds per day)! | ROG NOx co SO. PM10 rm2.59 Mobile 3.98 3.06 34.06 0.09 8.44 2.18 Area’ 10.00 0.10 10.86 <0.01 <0.01 <0.01 Energy? 0.03 0.48 0.40 <0.01 0.04 0.04 Total Emissions? 14.01 3.64 45.32 0.09 8.48 2.22 SCAQMD Threshold 55 55 550 150 150 55 SCAQMD Threshold Exceeded? No No No No No No ROG = reactive organic gases; NO; = nitrogen dioxide; CO = carbon monoxide; SO: = sulfur dioxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. The Project would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood burning devices in new developments. 3. The townhouses would be all-electric and would not include natural gas devices. Natural 4. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. As shown in Table 8, the Project’s regional operational emissions would not exceed the respective SCAQMD thresholds. Therefore, impacts would be less than significant, and no mitigation is required. Threshold (c) Would the Project expose sensitive receptors to substantial pollutant concentrations? Localized Construction Impacts LSTs represent the maximum emissions of NOx, CO, PM10, and PM2.5 generated at a Project Site that are not expected to cause or contribute to an exceedance of the CAAQS or NAAQS. The SCAQMD’s kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 22 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 methodology states that “off-site mobile emissions from the Project should not be included in the emissions compared to LSTs.” Therefore, only the emissions included in the CalEEMod “on-site” emissions outputs were considered for the LST analysis. Since CalEEMod calculates construction emissions based on the number of equipment hours and the maximum daily soil disturbance activity possible for each piece of equipment, Table 9: Equipment- Specific Grading Rates was used to determine the maximum daily disturbed acreage by the proposed Project for comparison to LSTs. Table 9: Equipment-Specific Grading Rates Construction Phase Equipment Type Equipment Quantity Acres Graded per 8-Hour Day Operating Hours per Day Acres Graded per Day Grading Graders 1 0.5 8 0.5 Dozers 1 0.5 8 0.5 Total 1 Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. Table 9 shows that Project construction is anticipated to disturb approximately 1-acre in a single day. As the LST guidance provides thresholds for projects disturbing 1-, 2-, and 5-acres in size, the LSTs for a 1-acre threshold were utilized for this analysis. The LSTs are based on the ambient concentrations of that pollutant for each SRA and distance to the nearest sensitive receptor. The Project Site is located in SCAQMD SRA 11 (South San Gabriel Valley). LSTs are provided for distances of 25, 50, 100, 200, and 500 meters to sensitive receptors. The sensitive receptors nearest the Project Site are the University of the West located adjacent to the south within the City and residential uses located adjacent to the west within the County. SCAQMD’s LST guidance recommends using the 25-meter threshold for receptors located 25 meters or less from the Project Site.16 Therefore, the LSTs for 1-acre at 25 meters in SRA 11 were utilized for this analysis. Table 10: Localized Significance of Project Construction Emissions summarizes the localized emissions during each construction phase. Table 10: Localized Significance of Project Construction Emissions Construction Phase Maximum Daily Emissions (pounds per day)1,2 NOX CO PM10 PM2.5 Individual Construction Phase Demolition (2026) 3.50 4.96 3.86 0.67 Demolition (2027) 3.43 4.96 3.85 0.66 Site Preparation (2027) 0.99 1.91 0.03 0.03 Grading (2027) 12.25 13.45 2.38 1.39 Infrastructure Improvements (2027) 3.66 5.14 0.10 0.09 Building Construction (2027) 7.28 9.20 0.26 0.24 16 South Coast Air Quality Management District, Sample Construction Scenarios for Projects Less than Five Acres in Size, 2005, https://www.aqmd.gov/docs/default-source/ceqa/handbook/localized-significance-thresholds/final-sample-construction-scenario- report.pdf?sfvrsn=2. Accessed August 12, 2025. Kimley»Horn page22 methodology states that “off-site mobile emissions from the Project should not be included in the emissions compared to LSTs.” Therefore, only the emissions included in the CalEEMod “on-site” emissions outputs were considered for the LST analysis. Since CalEEMod calculates construction emissions based on the number of equipment hours and the maximum daily soil disturbance activity possible for each piece of equipment, Table 9: Equipment- Specific Grading Rates was used to determine the maximum daily disturbed acreage by the proposed Project for comparison to LSTs. Table 9: Equipment-Specific Grading Rates . . Acres .en | caupmert Te | “MPT | crdedper |SPE | Acre add8-Hour Day ] Graders 1 0.5 8 0.5 Grading Dozers 1 05 8 05 Total 1 Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. Table 9 shows that Project construction is anticipated to disturb approximately 1-acre in a single day. As the LST guidance provides thresholds for projects disturbing 1-, 2-, and 5-acres in size, the LSTs for a 1-acre threshold were utilized for this analysis. The LSTs are based on the ambient concentrations of that pollutant for each SRA and distance to the nearest sensitive receptor. The Project Site is located in SCAQMD SRA 11 (South San Gabriel Valley). LSTs are provided for distances of 25, 50, 100, 200, and 500 meters to sensitive receptors. The sensitive receptors nearest the Project Site are the University of the West located adjacent to the south within the City and residential uses located adjacent to the west within the County. SCAQMD’s LST guidance recommends using the 25-meter threshold for receptors located 25 meters or less from the Project Site.® Therefore, the LSTs for 1-acre at 25 meters in SRA 11 were utilized for this analysis. Table 10: Localized Significance of Project Construction Emissions summarizes the localized emissions during each construction phase. Table 10: Localized Significance of Project Construction Emissions ] Maximum Daily Emissions (pounds per day)'?Construction Phase NO, | co | PM10 | | Individual Construction Phase Demolition (2026) 3.50 4.96 3.86 0.67 Demolition (2027) 3.43 4.96 3.85 0.66 Site Preparation (2027) 0.99 1.91 0.03 0.03 Grading (2027) 12.25 13.45 2.38 1.39 Infrastructure Improvements (2027) 3.66 5.14 0.10 0.09 Building Construction (2027) 7.28 9.20 0.26 0.24 16 South Coast Air Quality Management District, Sample Construction Scenarios for Projects Less than Five Acres in Size, 2005, https://www.agmd.gov/docs/default-source/ceqa/handbook/localized-significance-thresholds/final-sample-construction-scenario- report.pdf?sfursn=2. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page22 methodology states that “off-site mobile emissions from the Project should not be included in the emissions compared to LSTs.” Therefore, only the emissions included in the CalEEMod “on-site” emissions outputs were considered for the LST analysis. Since CalEEMod calculates construction emissions based on the number of equipment hours and the maximum daily soil disturbance activity possible for each piece of equipment, Table 9: Equipment- Specific Grading Rates was used to determine the maximum daily disturbed acreage by the proposed Project for comparison to LSTs. Table 9: Equipment-Specific Grading Rates . . Acres .en | caupmert Te | “MPT | crdedper |SPE | Acre add8-Hour Day ] Graders 1 0.5 8 0.5 Grading Dozers 1 05 8 05 Total 1 Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. Table 9 shows that Project construction is anticipated to disturb approximately 1-acre in a single day. As the LST guidance provides thresholds for projects disturbing 1-, 2-, and 5-acres in size, the LSTs for a 1-acre threshold were utilized for this analysis. The LSTs are based on the ambient concentrations of that pollutant for each SRA and distance to the nearest sensitive receptor. The Project Site is located in SCAQMD SRA 11 (South San Gabriel Valley). LSTs are provided for distances of 25, 50, 100, 200, and 500 meters to sensitive receptors. The sensitive receptors nearest the Project Site are the University of the West located adjacent to the south within the City and residential uses located adjacent to the west within the County. SCAQMD’s LST guidance recommends using the 25-meter threshold for receptors located 25 meters or less from the Project Site.® Therefore, the LSTs for 1-acre at 25 meters in SRA 11 were utilized for this analysis. Table 10: Localized Significance of Project Construction Emissions summarizes the localized emissions during each construction phase. Table 10: Localized Significance of Project Construction Emissions ] Maximum Daily Emissions (pounds per day)'?Construction Phase NO, | co | PM10 | | Individual Construction Phase Demolition (2026) 3.50 4.96 3.86 0.67 Demolition (2027) 3.43 4.96 3.85 0.66 Site Preparation (2027) 0.99 1.91 0.03 0.03 Grading (2027) 12.25 13.45 2.38 1.39 Infrastructure Improvements (2027) 3.66 5.14 0.10 0.09 Building Construction (2027) 7.28 9.20 0.26 0.24 16 South Coast Air Quality Management District, Sample Construction Scenarios for Projects Less than Five Acres in Size, 2005, https://www.agmd.gov/docs/default-source/ceqa/handbook/localized-significance-thresholds/final-sample-construction-scenario- report.pdf?sfursn=2. Accessed August 12, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 23 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Table 10: Localized Significance of Project Construction Emissions Construction Phase Maximum Daily Emissions (pounds per day)1,2 NOX CO PM10 PM2.5 Building Construction (2028) 6.91 9.20 0.23 0.21 Building Construction (2029) 6.63 9.16 0.21 0.20 Paving (2027) 3.47 4.98 0.15 0.14 Paving (2028) 3.31 4.95 0.13 0.12 Architectural Coating (2027) 1.66 2.25 0.04 0.04 Architectural Coating (2028) 1.62 2.24 0.03 0.03 Architectural Coating (2029) 1.59 2.22 0.03 0.02 Roadway Paving (2029) 6.88 11.71 0.22 0.20 Overlapping Construction Phases3 Paving + Building Construction + Architectural Coating (2027) 12.41 16.43 0.44 0.41 Paving + Building Construction + Architectural Coating (2028) 11.84 16.39 0.39 0.36 Building Construction + Architectural Coating (2028) 8.53 11.43 0.26 0.24 Building Construction + Architectural Coating (2029) 8.22 11.38 0.24 0.22 Maximum Daily Emissions 12.41 16.43 3.86 1.39 SCAQMD Localized Screening Threshold (1-acre of disturbance at 25 meters) 83 673 5 4 SCAQMD Threshold Exceeded? No No No No NO2 = nitrogen dioxide; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. SCAQMD Rule 403 Fugitive Dust applied for construction emissions. SCAQMD Rule 403 reduction/credits include: properly maintain mobile and other construction equipment; replace ground cover in disturbed areas quickly; water exposed surfaces three times daily; water all haul roads three times daily; and limit speeds on unpaved roads to 15 miles per hour. Reductions percentages from the SCAQMD CEQA Handbook (Tables XI-A through XI-E) were applied. 3. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. As shown in Table 10, pollutant emissions on the peak day of construction would not exceed the respective SCAQMD LSTs and, thus, would not result in significant concentrations of pollutants at the nearest sensitive receptors. Therefore, impacts would be less than significant, and no mitigation is required. Localized Operational Impacts According to the SCAQMD Localized Significance Threshold Methodology, operational LSTs apply to on-site sources. The Project Site is 9.28 acres. Since LSTs increase with acreage, the LSTs for 1-acre is conservatively used to evaluate the approximately 9.3-acre Project Site. As recommended by the SCAQMD, LSTs for 1-acre at 25 meters in SRA 11 were utilized in this analysis. The operational emissions summarized in Table 11: Localized Significance of Project Operational Emissions include all on-site Project-related stationary sources (area and energy sources). Kimley»Horn page23 Table 10: Localized Significance of Project Construction Emissions Maximum Daily Emissions (pounds per day)'? NYConstruction Phase NOx CO PM10 PM2.5 Building Construction (2028) 6.91 9.20 0.23 0.21 Building Construction (2029) 6.63 9.16 0.21 0.20 Paving (2027) 3.47 4.98 0.15 0.14 Paving (2028) 3.31 4.95 0.13 0.12 Architectural Coating (2027) 1.66 2.25 0.04 0.04 Architectural Coating (2028) 1.62 2.24 0.03 0.03 Architectural Coating (2029) 1.59 2.22 0.03 0.02 Roadway Paving (2029) 6.88 11.71 0.22 0.20 Overlapping Construction Phases? Paving + Building Construction + Architectural Coating (2027) 1241 16.43 0.44 0.41 Paving + Building Construction +. . 11.84 16.39 0.39 0.36Architectural Coating (2028) Building Construction + ArchitecturalCoating (2028) 8.53 11.43 0.26 0.24 Building Construction + Architectural 8.27 11.38 0.24 0.22 Coating (2029) Maximum Daily Emissions 12.41 16.43 3.86 1.39 SCAQMD Localized Screening Threshold (1-acre of disturbance at 25 meters) SCAQMD Threshold Exceeded? No No No No NO: = nitrogen dioxide; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. SCAQMD Rule 403 Fugitive Dust applied for construction emissions. SCAQMD Rule 403 reduction/credits include: properly maintain mobile and other construction equipment; replace ground cover in disturbed areas quickly; water exposed surfaces three times daily; water all haul roads three times daily; and limit speeds on unpaved roads to 15 miles per hour. Reductions percentages from the SCAQMD CEQA Handbook (Tables XI-A through XI-E) were applied. 3. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. 83 673 5 4 As shown in Table 10, pollutant emissions on the peak day of construction would not exceed the respective SCAQMD LSTs and, thus, would not result in significant concentrations of pollutants at the nearest sensitive receptors. Therefore, impacts would be less than significant, and no mitigation is required. Localized Operational Impacts According to the SCAQMD Localized Significance Threshold Methodology, operational LSTs apply to on-site sources. The Project Site is 9.28 acres. Since LSTs increase with acreage, the LSTs for 1-acre is conservatively used to evaluate the approximately 9.3-acre Project Site. As recommended by the SCAQMD, LSTs for 1-acre at 25 meters in SRA 11 were utilized in this analysis. The operational emissions summarized in Table 11: Localized Significance of Project Operational Emissions include all on-site Project-related stationary sources (area and energy sources). kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page23 Table 10: Localized Significance of Project Construction Emissions Maximum Daily Emissions (pounds per day)'? NYConstruction Phase NOx CO PM10 PM2.5 Building Construction (2028) 6.91 9.20 0.23 0.21 Building Construction (2029) 6.63 9.16 0.21 0.20 Paving (2027) 3.47 4.98 0.15 0.14 Paving (2028) 3.31 4.95 0.13 0.12 Architectural Coating (2027) 1.66 2.25 0.04 0.04 Architectural Coating (2028) 1.62 2.24 0.03 0.03 Architectural Coating (2029) 1.59 2.22 0.03 0.02 Roadway Paving (2029) 6.88 11.71 0.22 0.20 Overlapping Construction Phases? Paving + Building Construction + Architectural Coating (2027) 1241 16.43 0.44 0.41 Paving + Building Construction +. . 11.84 16.39 0.39 0.36Architectural Coating (2028) Building Construction + ArchitecturalCoating (2028) 8.53 11.43 0.26 0.24 Building Construction + Architectural 8.27 11.38 0.24 0.22 Coating (2029) Maximum Daily Emissions 12.41 16.43 3.86 1.39 SCAQMD Localized Screening Threshold (1-acre of disturbance at 25 meters) SCAQMD Threshold Exceeded? No No No No NO: = nitrogen dioxide; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. SCAQMD Rule 403 Fugitive Dust applied for construction emissions. SCAQMD Rule 403 reduction/credits include: properly maintain mobile and other construction equipment; replace ground cover in disturbed areas quickly; water exposed surfaces three times daily; water all haul roads three times daily; and limit speeds on unpaved roads to 15 miles per hour. Reductions percentages from the SCAQMD CEQA Handbook (Tables XI-A through XI-E) were applied. 3. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. 83 673 5 4 As shown in Table 10, pollutant emissions on the peak day of construction would not exceed the respective SCAQMD LSTs and, thus, would not result in significant concentrations of pollutants at the nearest sensitive receptors. Therefore, impacts would be less than significant, and no mitigation is required. Localized Operational Impacts According to the SCAQMD Localized Significance Threshold Methodology, operational LSTs apply to on-site sources. The Project Site is 9.28 acres. Since LSTs increase with acreage, the LSTs for 1-acre is conservatively used to evaluate the approximately 9.3-acre Project Site. As recommended by the SCAQMD, LSTs for 1-acre at 25 meters in SRA 11 were utilized in this analysis. The operational emissions summarized in Table 11: Localized Significance of Project Operational Emissions include all on-site Project-related stationary sources (area and energy sources). kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 24 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Table 11: Localized Significance of Project Operational Emissions Source Maximum Daily Emissions (pounds per day)1 NOX CO PM10 PM2.5 On-Site Emissions (Area + Energy Sources)1, 2, 3, 4 0.58 11.27 0.04 0.04 SCAQMD Localized Screening Threshold (1-acre at 25 meters) 83 673 1 1 SCAQMD Threshold Exceeded? No No No No NO2 = nitrogen dioxide; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. The Project would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood-burning devices in new developments. 3. The townhouses would be all-electric and would not include use of natural gas for cooking or heating. Natural gas would only be utilized in pool and spa heating. 4. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. As shown in Table 11, the maximum daily emissions during operations would not exceed the respective SCAQMD LSTs and are not expected to result in significant concentrations of pollutants at the nearest sensitive receptors. Therefore, impacts would be less than significant, and no mitigation is required. Carbon Monoxide Hot Spots An analysis of CO “hot spots” is needed to determine whether the change in the level of service of an intersection from Project-related traffic would have the potential to result in exceedances of the CAAQS or NAAQS. It has long been recognized that CO exceedances are caused by vehicular emissions, primarily when vehicles are idling at intersections. With the turnover of older vehicles, introduction of cleaner fuels, and implementation of control technology on industrial facilities, CO concentrations have steadily declined in the SoCAB. Accordingly, with the steadily decreasing CO emissions from vehicles, even very busy intersections do not result in exceedances of the CO standard. The SoCAB was re-designated as attainment in 2007 and CO hot spots are no longer addressed in the SCAQMD’s AQMP. The SCAQMD 2003 AQMP is the most recent AQMP that addresses CO concentrations. As part of the SCAQMD CO Hot Spot Analysis, the Wilshire Boulevard and Veteran Avenue intersection, one of the most congested intersections in Southern California with an average daily traffic volume of approximately 100,000 vehicles per day, was modeled for CO concentrations. This modeling effort identified a CO concentration high of 4.6-parts per million (ppm), which is well below the 35-ppm federal standard. According to Replica HQ, Walnut Grove Avenue between Rush Street and Drayer Lane has an existing ADT of 9,055.17 As CO hot spots were not experienced at the Wilshire Boulevard and Veteran Avenue intersection even as it accommodated 100,000 vehicles daily, it can be reasonably inferred the 1,375 total daily vehicle trips18 attributable to the Project would not generate CO hotspots at any 17 ReplicaHQ, Replica Annual Average Daily Traffic (AADT) Data, 2024, https://www.replicahq.com/aadt. Accessed September 16, 2025. 18 Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. Kimley»Horn Page 24 Table 11: Localized Significance of Project Operational Emissions Source Maximum Daily Emissions (pounds per day)! PM2.5NOx CO PM10 On-Site Emissions (Area + Energy Sources) 234 0.58 11.27 0.04 0.04 SCAQMD Localized Screening Threshold 33 673 1 1 (1-acre at 25 meters) SCAQMD Threshold Exceeded? No No No No NO: = nitrogen dioxide; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. The Project would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood-burning devices in new developments. 3. The townhouses would be all-electric and would not include use of natural gas for cooking or heating. Natural gas would only be utilized in pool and spa heating. 4. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. As shown in Table 11, the maximum daily emissions during operations would not exceed the respective SCAQMD LSTs and are not expected to result in significant concentrations of pollutants at the nearest sensitive receptors. Therefore, impacts would be less than significant, and no mitigation is required. Carbon Monoxide Hot Spots An analysis of CO “hot spots” is needed to determine whether the change in the level of service of an intersection from Project-related traffic would have the potential to result in exceedances of the CAAQS or NAAQS. It has long been recognized that CO exceedances are caused by vehicular emissions, primarily when vehicles are idling at intersections. With the turnover of older vehicles, introduction of cleaner fuels, and implementation of control technology on industrial facilities, CO concentrations have steadily declined in the SoCAB. Accordingly, with the steadily decreasing CO emissions from vehicles, even very busy intersections do not result in exceedances of the CO standard. The SoCAB was re-designated as attainment in 2007 and CO hot spots are no longer addressed in the SCAQMD’s AQMP. The SCAQMD 2003 AQMP is the most recent AQMP that addresses CO concentrations. As part of the SCAQMD CO Hot Spot Analysis, the Wilshire Boulevard and Veteran Avenue intersection, one of the most congested intersections in Southern California with an average daily traffic volume of approximately 100,000 vehicles per day, was modeled for CO concentrations. This modeling effort identified a CO concentration high of 4.6-parts per million (ppm), which is well below the 35-ppm federal standard. According to Replica HQ, Walnut Grove Avenue between Rush Street and Drayer Lane has an existing ADT of 9,055.7 As CO hot spots were not experienced at the Wilshire Boulevard and Veteran Avenue intersection even as it accommodated 100,000 vehicles daily, it can be reasonably inferred the 1,375 total daily vehicle trips!® attributable to the Project would not generate CO hotspots at any 17 ReplicaHQ, Replica Annual Average Daily Traffic (AADT) Data, 2024, https://www.replicahg.com/aadt. Accessed September 16, 2025. 18 Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn Page 24 Table 11: Localized Significance of Project Operational Emissions Source Maximum Daily Emissions (pounds per day)! PM2.5NOx CO PM10 On-Site Emissions (Area + Energy Sources) 234 0.58 11.27 0.04 0.04 SCAQMD Localized Screening Threshold 33 673 1 1 (1-acre at 25 meters) SCAQMD Threshold Exceeded? No No No No NO: = nitrogen dioxide; CO = carbon monoxide; PM10 = coarse particulate matter; PM2.5 = fine particulate matter 1. As recommended by the SCAQMD, emissions were calculated using CalEEMod version 2022.1. Worst-case seasonal maximum daily emissions are reported. 2. The Project would comply with SCAQMD Rule 445 (Wood Burning), which prohibits the installation of wood-burning devices in new developments. 3. The townhouses would be all-electric and would not include use of natural gas for cooking or heating. Natural gas would only be utilized in pool and spa heating. 4. Totals may not add up exactly due to rounding in the modeling calculations. Source: CalEEMod version 2022.1. Refer to Appendix A for the model outputs. As shown in Table 11, the maximum daily emissions during operations would not exceed the respective SCAQMD LSTs and are not expected to result in significant concentrations of pollutants at the nearest sensitive receptors. Therefore, impacts would be less than significant, and no mitigation is required. Carbon Monoxide Hot Spots An analysis of CO “hot spots” is needed to determine whether the change in the level of service of an intersection from Project-related traffic would have the potential to result in exceedances of the CAAQS or NAAQS. It has long been recognized that CO exceedances are caused by vehicular emissions, primarily when vehicles are idling at intersections. With the turnover of older vehicles, introduction of cleaner fuels, and implementation of control technology on industrial facilities, CO concentrations have steadily declined in the SoCAB. Accordingly, with the steadily decreasing CO emissions from vehicles, even very busy intersections do not result in exceedances of the CO standard. The SoCAB was re-designated as attainment in 2007 and CO hot spots are no longer addressed in the SCAQMD’s AQMP. The SCAQMD 2003 AQMP is the most recent AQMP that addresses CO concentrations. As part of the SCAQMD CO Hot Spot Analysis, the Wilshire Boulevard and Veteran Avenue intersection, one of the most congested intersections in Southern California with an average daily traffic volume of approximately 100,000 vehicles per day, was modeled for CO concentrations. This modeling effort identified a CO concentration high of 4.6-parts per million (ppm), which is well below the 35-ppm federal standard. According to Replica HQ, Walnut Grove Avenue between Rush Street and Drayer Lane has an existing ADT of 9,055.7 As CO hot spots were not experienced at the Wilshire Boulevard and Veteran Avenue intersection even as it accommodated 100,000 vehicles daily, it can be reasonably inferred the 1,375 total daily vehicle trips!® attributable to the Project would not generate CO hotspots at any 17 ReplicaHQ, Replica Annual Average Daily Traffic (AADT) Data, 2024, https://www.replicahg.com/aadt. Accessed September 16, 2025. 18 Kimley-Horn and Associates, Inc., Traffic Study for the Proposed 1515 Walnut Grove Avenue Project in the City of Rosemead, 2025. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Page 25 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 intersection within the Project area. Therefore, impacts would be less than significant, and no mitigation is required. Threshold (d) Would the Project result in other emissions (such as those leading to odors) adversely affecting a substantial number of people? Construction Odors Project construction would generate odors from equipment diesel exhaust, architectural coatings containing VOCs, and paving activities. However, these odors would be temporary, are not expected to affect a substantial number of people and would disperse rapidly. Additionally, the Project would be required to comply with SCAQMD Rule 402 (Nuisance) to prevent odor nuisances on sensitive receptors. SCAQMD Rule 402 (Nuisance) states: “A person shall not discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort, repose, health or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property.” Construction odors would be further minimized through Project compliance with heavy-duty construction equipment idling requirements (California Code of Regulations, Title 13, Sections 2449(d)(3) and 2485,) and established regulations that address construction materials storage, use, and disposal (CFR, Part 1926 – Safety and Health Regulations for Construction, Subpart H – Materials Handling, Storage Use and Disposal, et al.). As such, impacts would be less than significant, and no mitigation is required. Operational Odors The SCAQMD CEQA Air Quality Handbook identifies certain land uses as odor sources, such as agriculture (farming and livestock), wastewater treatment plants, food processing plants, chemical plants, composting facilities, refineries, landfills, dairies, and fiberglass molding. The Project would not develop land uses that have been identified by the SCAQMD as odor sources. As such, the Project would not create objectionable odors. Therefore, impacts would be less than significant, and no mitigation is required. Conclusion Project implementation would result in less than significant construction and operational air quality impacts, and no mitigation is required. Kimley»Horn page25 intersection within the Project area. Therefore, impacts would be less than significant, and no mitigation is required. Threshold (d) Would the Project result in other emissions (such as those leading to odors) adversely affecting a substantial number of people? Construction Odors Project construction would generate odors from equipment diesel exhaust, architectural coatings containing VOCs, and paving activities. However, these odors would be temporary, are not expected to affect a substantial number of people and would disperse rapidly. Additionally, the Project would be required to comply with SCAQMD Rule 402 (Nuisance) to prevent odor nuisances on sensitive receptors. SCAQOMD Rule 402 (Nuisance) states: “A person shall not discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort, repose, health or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property.” Construction odors would be further minimized through Project compliance with heavy-duty construction equipment idling requirements (California Code of Regulations, Title 13, Sections 2449(d)(3) and 2485,) and established regulations that address construction materials storage, use, and disposal (CFR, Part 1926 — Safety and Health Regulations for Construction, Subpart H — Materials Handling, Storage Use and Disposal, et al.). As such, impacts would be less than significant, and no mitigation is required. Operational Odors The SCAQMD CEQA Air Quality Handbook identifies certain land uses as odor sources, such as agriculture (farming and livestock), wastewater treatment plants, food processing plants, chemical plants, composting facilities, refineries, landfills, dairies, and fiberglass molding. The Project would not develop land uses that have been identified by the SCAQMD as odor sources. As such, the Project would not create objectionable odors. Therefore, impacts would be less than significant, and no mitigation is required. Conclusion Project implementation would result in less than significant construction and operational air quality impacts, and no mitigation is required. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Kimley»Horn page25 intersection within the Project area. Therefore, impacts would be less than significant, and no mitigation is required. Threshold (d) Would the Project result in other emissions (such as those leading to odors) adversely affecting a substantial number of people? Construction Odors Project construction would generate odors from equipment diesel exhaust, architectural coatings containing VOCs, and paving activities. However, these odors would be temporary, are not expected to affect a substantial number of people and would disperse rapidly. Additionally, the Project would be required to comply with SCAQMD Rule 402 (Nuisance) to prevent odor nuisances on sensitive receptors. SCAQOMD Rule 402 (Nuisance) states: “A person shall not discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort, repose, health or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property.” Construction odors would be further minimized through Project compliance with heavy-duty construction equipment idling requirements (California Code of Regulations, Title 13, Sections 2449(d)(3) and 2485,) and established regulations that address construction materials storage, use, and disposal (CFR, Part 1926 — Safety and Health Regulations for Construction, Subpart H — Materials Handling, Storage Use and Disposal, et al.). As such, impacts would be less than significant, and no mitigation is required. Operational Odors The SCAQMD CEQA Air Quality Handbook identifies certain land uses as odor sources, such as agriculture (farming and livestock), wastewater treatment plants, food processing plants, chemical plants, composting facilities, refineries, landfills, dairies, and fiberglass molding. The Project would not develop land uses that have been identified by the SCAQMD as odor sources. As such, the Project would not create objectionable odors. Therefore, impacts would be less than significant, and no mitigation is required. Conclusion Project implementation would result in less than significant construction and operational air quality impacts, and no mitigation is required. kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213 261 4040 Appendix A Air Quality Modeling Data Appendix A Air Quality Modeling Data Appendix A Air Quality Modeling Data 1515 Walnut Grove Avenue Project CalEEMod Assumptions Land Use Land Use Size Unit Gross Size (SF) Landscaping (SF) Lot Size (AC)1 Condo/Townhouse DU 191 390,616 70,382 5.0825758 Recreational Swimming Pool KSF 2.093 2,093 - 0.04804866757243872 Other Non-Asphalt Surfaces2 KSF 57.252 - 1,253 1.34309 Parking Lot AC 2.903921 - - 3.003921 Road Widening3 Mile 0.15 - - 0.5 DU = dwelling unit; AC = acres; KSF = thousand square feet; SF = square feet 1. The lot size is based on the building footprint and landscaping and not the gross square feet. 2. Accounts for on-site improvements, 3,000 square feet of right-of-way sidewalk improvements, and 1,253 square feet of landscaping improvements along the Walnut Grove Avenue frontage. 3. Accounts for roadway improvements along Walnut Grove Avenue. Construction Schedule Construction Phase Start Date End Date Workdays Demolition 10/1/2026 2/28/2027 107 Site Preparation 4/1/2027 5/15/2027 32 Grading 5/16/2027 7/31/2027 55 Infrastructure Improvements 8/1/2027 12/15/2027 98 Building Construction 12/16/2027 6/30/2029 402 Paving 12/1/2027 2/28/2028 64 Architectural Coating 12/16/2027 8/1/2029 425 Roadway Paving 8/2/2029 8/8/2029 5 Per client questionnaire Equipment Construction Phase Equipment1,2 Number per Day Hours per Day Demolition Excavators 3 8 Tractors/Loaders/Backhoes 1 8 Site Preparation Tractors/Loaders/Backhoes 1 8 Grading Excavators 1 8 Rubber Tired Dozers 1 8 Tractors/Loaders/Backhoes 1 8 Graders 1 8 Infrastructure Improvements Concrete/Industrial Saws 1 8 Trenchers 1 8 Tractors/Loaders/Backhoes 1 8 Building Construction Cranes 1 7 Forklifts 1 8 Generator Sets 1 8 Tractors/Loaders/Backhoes 2 7 Welders 1 8 Paving Pavers 1 8 Paving Equipment 1 8 Rollers 1 8 1515 Walnut Grove Avenue Project CalEEMod Assumptions Land Use Condo/Townhouse DU 191 390,616 70,382 5.0825758 Recreational Swimming Pool KSF 2.093 2,093 - 0.04804866757243872 Other Non-Asphalt Surfaces? KSF 57.252 - 1,253 1.34309 Parking Lot AC 2.903921 - - 3.003921 Road Widening? Mile 0.15 - - 0.5 DU = dwelling unit; AC = acres; KSF = thousand square feet; SF = square feet 1. The lot size is based on the building footprint and landscaping and not the gross square feet. 2. Accounts for on-site improvements, 3,000 square feet of right-of-way sidewalk improvements, and 1,253 square feet of landscaping improvements along the Walnut Grove Avenue frontage. 3. Accounts for roadway improvements along Walnut Grove Avenue. Construction Schedule Demolition 10/1/2026 2/28/2027 107 Site Preparation 4/1/2027 5/15/2027 32 Grading 5/16/2027 7/31/2027 55 Infrastructure Improvements 8/1/2027 12/15/2027 98 Building Construction 12/16/2027 6/30/2029 402 Paving 12/1/2027 2/28/2028 64 Architectural Coating 12/16/2027 8/1/2029 425 Roadway Paving 8/2/2029 8/8/2029 5 Per client questionnaire Equipment Tractors/Loaders/Backhoes Welders Pavers Paving Paving Equipment Demolition Excavators 3 8 Tractors/Loaders/Backhoes 1 8 Site Preparation Tractors/Loaders/Backhoes 1 8 Excavators 1 8 Grading Rubber Tired Dozers 1 8 Tractors/Loaders/Backhoes 1 8 Graders 1 8 Concrete/Industrial Saws 1 8InfrastructureImprovements Trenchers 1 8 Tractors/Loaders/Backhoes 1 8 Cranes 1 7 Forklifts 1 8 Building Construction Generator Sets 1 8 2 7 1 8 1 8 1 8 1 8Rollers 1515 Walnut Grove Avenue Project CalEEMod Assumptions 2 Construction Phase Equipment1,2 Number per Day Hours per Day Architectural Coating Air Compressors 2 6 Roadway Paving Pavers 1 8 Paving Equipment 1 8 Rollers 2 8 Signal Boards 1 8 Tractors/Loaders/Backhoes 3 8 Excavators 3 8 1. All anticipated equipment but roadway paving equipment per client input. 2. Roadway paving equipment per the CalEEMod Appendix G. Worker, Vendor, and Haul Trips Trip Type # One-Way Trips/Day Trip Length (miles) Demolition Worker 10 18.5 Vendor - 10.2 Hauling 71.74766355140187 43.11 On-Site Truck - - Site Preparation Worker 2.5 18.5 Vendor - 10.2 Hauling - 20 On-Site Truck - - Grading Worker 10 18.5 Vendor - 10.2 Hauling 17.054545454545455 20 On-Site Truck - - Infrastructure Improvements Worker 7.5 18.5 Vendor - 10.2 Hauling - 20 On-Site Truck - - Building Construction Worker 138.39906 18.5 Vendor 20.7609427 10.2 Hauling - 20 On-Site Truck - - Paving Worker 7.5 18.5 Vendor - 10.2 Hauling - 20 On-Site Truck - - Architectural Coating Worker 27.679812 18.5 Vendor - 10.2 Hauling - 20 On-Site Truck - - Roadway Paving Worker 20 18.5 Vendor - 10.2 Hauling - 20 Onsite truck - - 1. Demolition haul mileage assumes worst-case disposal site distance. 1515 Walnut Grove Avenue Project tio Architectural Coating CalEEMod Assumptions Roadway Paving Equipment”SE..c.. <I Air Compressors 2 6 Pavers 1 8 Paving Equipment 1 8 Rollers 2 8 Signal Boards 1 8 Tractors/Loaders/Backhoes 3 8 Excavators 3 8 1. All anticipated equipment but roadway paving equipment per client input. 2. Roadway paving equipment per the CalEEMod Appendix G. Worker, Vendor, and Haul Trips Trip Type —One-Way Trips rip Length (miles) Demolition Worker 10 18.5 Vendor - 10.2 Hauling 71.74766355140187 43.1" On-Site Truck - - Worker 2.5 18.5 Vendor - 10.2 Hauling - 20 On-Site Truck - - Worker 10 18.5 Vendor - 10.2 Hauling 17.054545454545455 20 On-Site Truck - - Worker 7.5 18.5 Vendor - 10.2 Hauling - 20 On-Site Truck Building Cons Worker 138.39906 18.5 Vendor 20.7609427 10.2 Hauling - 20 On-Site Truck Worker 7.5 18.5 Vendor - 10.2 Hauling - 20 On-Site Truckirchitectural Worker 27.679812 18.5 Vendor - 10.2 Hauling - 20 On-Site Truck - - Worker 20 18.5 Vendor - 10.2 Hauling - 20 Onsite truck 1. Demolition haul mileage assumes worst-case disposal site distance. 1515 Walnut Grove Avenue Project CalEEMod Assumptions 3 Demolition Phase1 Amount (tons)2 Haul Distance (miles)3 Demolition 30,706 43.1 1. construction phase assumes watering demolished areas 2 times per day. 2. accounts for demolition of the existing on-site development and off-site sidewalk and driveway. 3. haul mileage assumes worst-case disposal site distance. Earthwork Phase1 Import (cubic yards)2 Export (cubic yards) Haul Distance (miles) Site Preparation - - - Grading 7,500 - 20 1. Project would comply with SCAQMD Rule 403, which includes:  watering exposed areas 3 times per day during earthmoving activities  watering unpaved roads 2 times per day and limiting vehicle speeds on unpaved roads to 25 mph throughout construction 2. per client input Operations Vehicle Data Land Use Size Unit Trip Rate Daily Trip Generation Condo/Townhouse DU 191 7.19895 1,375 DU = dwelling unit 100% primary trips; trip lengths and trip type distributions are CalEEMod defaults Trip Length Land Use Trip Length (miles) Non-Res H-W / Res H-W Non-Res W-O / Res H-S Non-Res O-O / Res H-O Condo/Townhouse 16.59980276 8.166836029 7.470048003 CalEEMod defaults Trip Purpose and Percent Land Use Trip Percent (%) Trip Purpose (%) Primary Diverted Pass-By Non-Res H-W / Res H-W Non-Res W-O / Res H-S Non-Res O-O / Res H-O Condo/Townhouse 100 0 0 10.8594325 20.623109 68.5174585 CalEEMod defaults Fleet Mix Land Use Fleet Mix (%) HHD LDA LDT1 LDT2 LHD1 LHD2 MCY MDV MH MHD OBUS SBUS UBUS Condo/Town house 0.92470 4410135 746 48.188 53437 90054 3 4.1009 27710 53314 24.773 04637 43209 84 2.7840 49883 48484 04 0.7307 55180 12046 81 2.2597 53830 73091 5 14.638 26894 76013 18 0.2713 32310 51266 193 1.1193 67592 03672 4 0.0825 74400 58514 476 0.0652 82697 32370 973 0.0614 02801 65709 555 CalEEMod defaults 1515 Walnut Grove Avenue Project Demolition Demolition CalEEMod Assumptions 1. construction phase assumes watering demolished areas 2 times per day. 2. accounts for demolition of the existing on-site development and off-site sidewalk and driveway. 3. haul mileage assumes worst-case disposal site distance. Earthwork Site Preparation Grading 7,500 20 1. Project would comply with SCAQMD Rule 403, which includes: . watering exposed areas 3 times per day during earthmoving activities 2. perclient input watering unpaved roads 2 times per day and limiting vehicle speeds on unpaved roads to 25 mph throughout construction Operations Vehicle Data Daily Tri Generatidand Use Condo/Townhouse DU 191 7.19895 1,375 DU = dwelling unit 100% primary trips; trip lengths and trip type distributions are CalEEMod defaults Trip Length Trip Length (miles) Land Use Non-Res H-W Non-Res W-O Non-Res 0-0 / Res H-W / Res H-S / Res H-O Condo/Townhouse 16.59980276 8.166836029 7.470048003 CalEEMod defaults Trip Purpose and Percent Trip Percent (%) Trip Purpose (%) Land Use Prima Diverted Pass-B Non-Res H-W Non-Res W-O Non-Res 0-0v Y | /ResH-W /Res H-S /Res H-0 Condo/Townhouse 100 0 0 10.8594325 20.623109 68.5174585 CalEEMod defaults Fleet Mix d Use Fleet Mix (%) HHD LDA LDT1 LDT2 LHD1 LHD2 MCY MDV MH MHD OBUS SBUS U Condo/Town 0.92470 48.188 4.1009 24.773 | 2.7840 | 0.7307 | 2.2597 | 14.638 | 0.2713 | 1.1193 | 0.0825 | 0.0652 | 0.0614 house 4410135 53437 27710 04637 49883 55180 53830 26894 32310 67592 74400 82697 02801 746 90054 53314 43209 48484 12046 73091 76013 51266 03672 58514 32370 65709 3 84 04 81 5 18 193 4 476 973 555 CalEEMod defaults 1515 Walnut Grove Avenue Project CalEEMod Assumptions 4 Hearths Land Use # Electric # Without Fireplaces Condo/Townhouse 128.925 62.075 Project would comply with SCAQMD 445 (Wood Burning), which prohibits permanently installed wood burning devices in new developments. The building would be all-electric and would not utilize natural gas. Energy Land Use Electricity (kWh/year) Natural Gas (kBTU/Year) Subject to Title 24 Not Subject to Title 24 Townhouse 879,046 - 216,672.3 662,373.7 Recreational Swimming Pool1 - 1,787,877.56 1,787,877.56 - Parking Lot 114,625.3 - 114,625.3 - The building would be all-electric, however natural gas pool heating assumed. 1. Calculated based on natural gas factor = 0.022837443 MMBTU per year per gallon of water. 1515 Walnut Grove Avenue Project CalEEMod Assumptions Hearths Condo/Townhouse 128.925 62.075 Project would comply with SCAQMD 445 (Wood Burning), which prohibits permanently installed wood burning devices in new developments. The building would be all-electric and would not utilize natural gas. Energy Townhouse 879,046 - 216,672.3 662,373.7 Recreational Swimming Pool’ - 1,787,877.56 1,787,877.56 - Parking Lot 114,625.3 - 114,625.3 - The building would be all-electric, however natural gas pool heating assumed. 1. Calculated based on natural gas factor = 0.022837443 MMBTU per year per gallon of water. 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 1 / 67 1515 Walnut Grove Avenue Detailed Report Table of Contents 1. Basic Project Information 1.1. Basic Project Information 1.2. Land Use Types 1.3. User-Selected Emission Reduction Measures by Emissions Sector 2. Emissions Summary 2.1. Construction Emissions Compared Against Thresholds 2.2. Construction Emissions by Year, Unmitigated 2.4. Operations Emissions Compared Against Thresholds 2.5. Operations Emissions by Sector, Unmitigated 3. Construction Emissions Details 3.1. Roadway Paving (2029) - Unmitigated 3.3. Demolition (2026) - Unmitigated 3.5. Demolition (2027) - Unmitigated 3.7. Site Preparation (2027) - Unmitigated 3.9. Grading (2027) - Unmitigated 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 1515 Walnut Grove Avenue Detailed Report Table of Contents 1. Basic Project Information 1.1. Basic Project Information 1.2. Land Use Types 1.3. User-Selected Emission Reduction Measures by Emissions Sector 2. Emissions Summary 2.1. Construction Emissions Compared Against Thresholds 2.2. Construction Emissions by Year, Unmitigated 2.4. Operations Emissions Compared Against Thresholds 2.5. Operations Emissions by Sector, Unmitigated 3. Construction Emissions Details 3.1. Roadway Paving (2029) - Unmitigated 3.3. Demolition (2026) - Unmitigated 3.5. Demolition (2027) - Unmitigated 3.7. Site Preparation (2027) - Unmitigated 3.9. Grading (2027) - Unmitigated 1/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 2 / 67 3.11. Building Construction (2027) - Unmitigated 3.13. Building Construction (2028) - Unmitigated 3.15. Building Construction (2029) - Unmitigated 3.17. Paving (2027) - Unmitigated 3.19. Paving (2028) - Unmitigated 3.21. Architectural Coating (2027) - Unmitigated 3.23. Architectural Coating (2028) - Unmitigated 3.25. Architectural Coating (2029) - Unmitigated 3.27. Infrastructure Improvements (2027) - Unmitigated 4. Operations Emissions Details 4.1. Mobile Emissions by Land Use 4.1.1. Unmitigated 4.2. Energy 4.2.1. Electricity Emissions By Land Use - Unmitigated 4.2.3. Natural Gas Emissions By Land Use - Unmitigated 4.3. Area Emissions by Source 4.3.1. Unmitigated 4.4. Water Emissions by Land Use 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 3.11. Building Construction (2027) - Unmitigated 3.13. Building Construction (2028) - Unmitigated 3.15. Building Construction (2029) - Unmitigated 3.17. Paving (2027) - Unmitigated 3.19. Paving (2028) - Unmitigated 3.21. Architectural Coating (2027) - Unmitigated 3.23. Architectural Coating (2028) - Unmitigated 3.25. Architectural Coating (2029) - Unmitigated 3.27. Infrastructure Improvements (2027) - Unmitigated . Operations Emissions Details 4.1. Mobile Emissions by Land Use 4.1.1. Unmitigated 4.2. Energy 4.2 1. Electricity Emissions By Land Use - Unmitigated 4.2.3. Natural Gas Emissions By Land Use - Unmitigated 4.3. Area Emissions by Source 4.3.1. Unmitigated 4.4. Water Emissions by Land Use 2/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 3 / 67 4.4.1. Unmitigated 4.5. Waste Emissions by Land Use 4.5.1. Unmitigated 4.6. Refrigerant Emissions by Land Use 4.6.1. Unmitigated 4.7. Offroad Emissions By Equipment Type 4.7.1. Unmitigated 4.8. Stationary Emissions By Equipment Type 4.8.1. Unmitigated 4.9. User Defined Emissions By Equipment Type 4.9.1. Unmitigated 4.10. Soil Carbon Accumulation By Vegetation Type 4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated 4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated 4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated 5. Activity Data 5.1. Construction Schedule 5.2. Off-Road Equipment 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 4.4.1. Unmitigated 4.5. Waste Emissions by Land Use 4.5.1. Unmitigated 4.6. Refrigerant Emissions by Land Use 4.6.1. Unmitigated 4.7. Offroad Emissions By Equipment Type 4.7.1. Unmitigated 4.8. Stationary Emissions By Equipment Type 4.8.1. Unmitigated 4.9. User Defined Emissions By Equipment Type 4.9.1. Unmitigated 4.10. Soil Carbon Accumulation By Vegetation Type 4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated 4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated 4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated 5. Activity Data 5.1. Construction Schedule 5.2. Off-Road Equipment 3/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 4 / 67 5.2.1. Unmitigated 5.3. Construction Vehicles 5.3.1. Unmitigated 5.4. Vehicles 5.4.1. Construction Vehicle Control Strategies 5.5. Architectural Coatings 5.6. Dust Mitigation 5.6.1. Construction Earthmoving Activities 5.6.2. Construction Earthmoving Control Strategies 5.7. Construction Paving 5.8. Construction Electricity Consumption and Emissions Factors 5.9. Operational Mobile Sources 5.9.1. Unmitigated 5.10. Operational Area Sources 5.10.1. Hearths 5.10.2. Architectural Coatings 5.10.3. Landscape Equipment 5.11. Operational Energy Consumption 5.2.1. Unmitigated 5.3. Construction Vehicles 5.3.1. Unmitigated 5.4. Vehicles 5.4.1. Construction Vehicle Control Strategies 5.5. Architectural Coatings 5.6. Dust Mitigation 5.6.1. Construction Earthmoving Activities 5.6.2. Construction Earthmoving Control Strategies 5.7. Construction Paving 5.8. Construction Electricity Consumption and Emissions Factors 5.9. Operational Mobile Sources 5.9.1. Unmitigated 5.10. Operational Area Sources 5.10.1. Hearths 5.10.2. Architectural Coatings 5.10.3. Landscape Equipment 5.11. Operational Energy Consumption 4167 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 5 / 67 5.11.1. Unmitigated 5.12. Operational Water and Wastewater Consumption 5.12.1. Unmitigated 5.13. Operational Waste Generation 5.13.1. Unmitigated 5.14. Operational Refrigeration and Air Conditioning Equipment 5.14.1. Unmitigated 5.15. Operational Off-Road Equipment 5.15.1. Unmitigated 5.16. Stationary Sources 5.16.1. Emergency Generators and Fire Pumps 5.16.2. Process Boilers 5.17. User Defined 5.18. Vegetation 5.18.1. Land Use Change 5.18.1.1. Unmitigated 5.18.1. Biomass Cover Type 5.18.1.1. Unmitigated 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 5.11.1. Unmitigated 5.12. Operational Water and Wastewater Consumption 5.12.1. Unmitigated 5.13. Operational Waste Generation 5.13.1. Unmitigated 5.14. Operational Refrigeration and Air Conditioning Equipment 5.14.1. Unmitigated 5.15. Operational Off-Road Equipment 5.15.1. Unmitigated 5.16. Stationary Sources 5.16.1. Emergency Generators and Fire Pumps 5.16.2. Process Boilers 5.17. User Defined 5.18. Vegetation 5.18.1. Land Use Change 5.18.1.1. Unmitigated 5.18.1. Biomass Cover Type 5.18.1.1. Unmitigated 5/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 6 / 67 5.18.2. Sequestration 5.18.2.1. Unmitigated 6. Climate Risk Detailed Report 6.1. Climate Risk Summary 6.2. Initial Climate Risk Scores 6.3. Adjusted Climate Risk Scores 6.4. Climate Risk Reduction Measures 7. Health and Equity Details 7.1. CalEnviroScreen 4.0 Scores 7.2. Healthy Places Index Scores 7.3. Overall Health & Equity Scores 7.4. Health & Equity Measures 7.5. Evaluation Scorecard 7.6. Health & Equity Custom Measures 8. User Changes to Default Data 8.1. Justifications 5.18.2. Sequestration 5.18.2.1. Unmitigated 6. Climate Risk Detailed Report 6.1. Climate Risk Summary 6.2. Initial Climate Risk Scores 6.3. Adjusted Climate Risk Scores 6.4. Climate Risk Reduction Measures 7. Health and Equity Details 7.1. CalEnviroScreen 4.0 Scores 7.2. Healthy Places Index Scores 7.3. Overall Health & Equity Scores 7.4. Health & Equity Measures 7.5. Evaluation Scorecard 7.6. Health & Equity Custom Measures 8. User Changes to Default Data 8.1. Justifications 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 7 / 67 1. Basic Project Information 1.1. Basic Project Information Data Field Value Project Name 1515 Walnut Grove Avenue Construction Start Date 10/1/2026 Operational Year 2029 Lead Agency — Land Use Scale Project/site Analysis Level for Defaults County Windspeed (m/s)0.50 Precipitation (days)18 Location 1515 Walnut Grove Ave, Rosemead, CA 91770, USA County Los Angeles-South Coast City Rosemead Air District South Coast AQMD Air Basin South Coast TAZ 4169 EDFZ 7 Electric Utility Southern California Edison Gas Utility Southern California Gas App Version 2022.1.1.35 1.2. Land Use Types Land Use Subtype Size Unit Lot Acreage Building Area (sq ft)Landscape Area (sq ft) Special Landscape Area (sq ft) Population Description Condo/Townhouse 191 Dwelling Unit 5.1 390,616 70,382 —565 — 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 1. Basic Project Information 1.1. Basic Project Information Project Name 1515 Walnut Grove Avenue Construction Start Date 10/1/2026 Operational Year 2029 Lead Agency — Land Use Scale Project/site Analysis Level for Defaults County Windspeed (m/s) 0.50 Precipitation (days) 18 Location 1515 Walnut Grove Ave, Rosemead, CA 91770, USA , County Los Angeles-South Coast | City Rosemead Air District South Coast AQMD ' Air Basin South Coast TAZ 4169 EDFZ 7 Electric Utility Southern California Edison (Gas Utility Southern California Gas App Version 2022.1.1.35 1.2. Land Use Types Condo/Townhouse Dwelling Unit 390,616 70,382 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 8 / 67 Recreational Swimming Pool 2.1 1000sqft 0.05 2,093 0.00 ——— Other Non-Asphalt Surfaces 57 1000sqft 1.3 0.00 1,253 ——— Parking Lot 2.9 Acre 3.0 0.00 0.00 ——— Road Widening 0.15 Mile 0.50 0.00 0.00 ——— 1.3. User-Selected Emission Reduction Measures by Emissions Sector No measures selected 2. Emissions Summary 2.1. Construction Emissions Compared Against Thresholds Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit.TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Unmit.7.8 7.5 14 21 0.03 0.55 2.3 2.8 0.51 1.0 1.5 —4,893 4,893 0.16 0.21 7.7 4,959 Daily, Winter (Max) —————————————————— Unmit.8.4 8.1 15 26 0.08 0.45 6.8 7.0 0.41 1.4 1.6 —11,224 11,224 0.56 1.7 0.62 11,736 Average Daily (Max) —————————————————— Unmit.5.6 5.4 7.4 15 0.02 0.21 1.7 1.9 0.19 0.40 0.59 —3,544 3,544 0.10 0.30 2.4 3,588 Annual (Max) —————————————————— Unmit.1.0 0.98 1.4 2.7 < 0.005 0.04 0.31 0.34 0.03 0.07 0.11 —587 587 0.02 0.05 0.40 594 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Recreational 2.1 1000sqft 0.05 2,093 0.00 — — — Swimming Pool Other Non-Asphalt |57 1000sqft 1.3 0.00 1,253 — — — Surfaces Parking Lot 29 Acre 3.0 0.00 0.00 — — — I Road Widening 0.15 Mile 0.50 0.00 0.00 — — — 1.3. User-Selected Emission Reduction Measures by Emissions Sector No measures selected 2. Emissions Summary 2.1. Construction Emissions Compared Against Thresholds Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — Summer (Max) Unmit. |7.8 7.5 14 21 0.03 0.55 23 28 0.51 1.0 1.5 — 4,893 4,893 0.16 0.21 7.7 4,959 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Unmit. [8.4 8.1 16 26 0.08 0.45 6.8 7.0 0M 1.4 1.6 — 11,224 (11,224 (0.56 1.7 0.62 11,736 Average |— — — — — — — — — — — — — — — — — — Daily (Max) Unmit. [5.6 54 74 16 0.02 0.21 1.7 1.9 0.19 0.40 0.59 — 3,544 3.544 0.10 0.30 24 3,588 Annual |[— — — — — — — — — — — — _ — _ _ _ _ (Max) Unmit. [1.0 0.98 1.4 27 < 0.005 |0.04 0.31 0.34 0.03 0.07 0.11 — 587 587 0.02 0.05 0.40 594 8/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 9 / 67 2.2. Construction Emissions by Year, Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Year TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily - Summer (Max) —————————————————— 2027 1.8 1.4 14 15 0.03 0.55 2.3 2.8 0.51 1.0 1.5 —3,649 3,649 0.16 0.21 2.8 3,718 2028 7.8 7.5 9.7 21 0.03 0.27 2.3 2.6 0.25 0.56 0.80 —4,893 4,893 0.13 0.18 7.7 4,959 2029 7.7 7.4 9.3 20 0.03 0.24 2.3 2.6 0.23 0.56 0.78 —4,839 4,839 0.13 0.18 7.0 4,904 Daily - Winter (Max) —————————————————— 2026 1.1 0.53 15 9.6 0.08 0.24 6.8 7.0 0.23 1.4 1.6 —11,224 11,224 0.56 1.7 0.62 11,736 2027 8.4 8.1 15 26 0.08 0.45 6.8 7.0 0.41 1.4 1.6 —11,015 11,015 0.49 1.7 0.58 11,525 2028 8.3 8.0 13 25 0.03 0.39 2.4 2.8 0.36 0.58 0.94 —5,629 5,629 0.17 0.19 0.21 5,691 2029 7.6 7.4 9.4 19 0.03 0.24 2.3 2.6 0.23 0.56 0.78 —4,729 4,729 0.13 0.18 0.18 4,788 Average Daily —————————————————— 2026 0.21 0.10 2.8 1.7 0.01 0.04 1.2 1.3 0.04 0.25 0.29 —2,021 2,021 0.10 0.30 1.9 2,115 2027 0.84 0.68 5.4 5.9 0.02 0.16 1.2 1.4 0.15 0.34 0.48 —2,278 2,278 0.10 0.23 1.5 2,351 2028 5.6 5.4 7.4 15 0.02 0.21 1.7 1.9 0.19 0.40 0.59 —3,544 3,544 0.10 0.13 2.4 3,588 2029 3.1 3.0 3.5 7.3 0.01 0.09 0.85 0.94 0.08 0.20 0.29 —1,751 1,751 0.05 0.07 1.1 1,773 Annual —————————————————— 2026 0.04 0.02 0.52 0.32 < 0.005 0.01 0.22 0.23 0.01 0.05 0.05 —335 335 0.02 0.05 0.31 350 2027 0.15 0.12 0.99 1.1 < 0.005 0.03 0.22 0.25 0.03 0.06 0.09 —377 377 0.02 0.04 0.24 389 2028 1.0 0.98 1.4 2.7 < 0.005 0.04 0.31 0.34 0.03 0.07 0.11 —587 587 0.02 0.02 0.40 594 2029 0.57 0.55 0.65 1.3 < 0.005 0.02 0.15 0.17 0.02 0.04 0.05 —290 290 0.01 0.01 0.18 294 2.4. Operations Emissions Compared Against Thresholds 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 2.2. Construction Emissions by Year, Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily - — — — — — — — — — — — — — — — — — — Summer (Max) 2027 1.8 1.4 14 15 0.03 0.55 23 28 0.51 1.0 1.5 — 3,649 3,649 0.16 0.21 238 3,718 2028 7.8 75 9.7 21 0.03 0.27 23 2.6 0.25 0.56 0.80 — 4,893 4,893 0.13 0.18 77 4,959 2029 7.7 74 9.3 20 0.03 0.24 23 2.6 0.23 0.56 0.78 — 4,839 4,839 0.13 0.18 7.0 4,904 Daily - |— — — — — — — — — — — — — — — — — — Winter (Max) 2026 1.1 0.53 15 9.6 0.08 0.24 6.8 7.0 0.23 14 1.6 — 11,224 (11,224 [0.56 1.7 0.62 11,736 (2027 8.4 8.1 15 26 0.08 0.45 6.8 7.0 0.41 14 1.6 — 11,015 "11,015 [0.49 1.7 0.58 11,525 |2028 8.3 8.0 13 25 0.03 0.39 24 28 0.36 0.58 0.94 — 5,629 5,629 0.17 0.19 0.21 5,691 , 2029 7.6 74 9.4 19 0.03 0.24 23 2.6 0.23 0.56 0.78 — 4,729 4,729 0.13 0.18 0.18 4,788 Average — — — — — — — — — — — — — — — — — — Daily '2026 0.21 0.10 28 1.7 0.01 0.04 1.2 1.3 0.04 0.25 0.29 — 2,021 2,021 0.10 0.30 1.9 2,115 2027 0.84 0.68 54 5.9 0.02 0.16 1.2 14 0.15 0.34 0.48 — 2,278 2,278 0.10 0.23 1.5 2,351 2028 5.6 54 74 15 0.02 0.21 1.7 1.9 0.19 0.40 0.59 — 3,544 3.544 0.10 0.13 24 3,588 2029 3.1 3.0 35 7.3 0.01 0.09 0.85 0.94 0.08 0.20 0.29 — 1,751 1,751 0.05 0.07 1.1 1,773 Annual |— — — — — — — — — — — — — — — — — — 2026 0.04 0.02 0.52 0.32 < 0.005 |0.01 0.22 0.23 0.01 0.05 0.05 — 335 335 0.02 0.05 0.31 350 2027 0.15 0.12 0.99 1.1 <0.005 '0.03 0.22 0.25 0.03 0.06 0.09 — 377 377 0.02 0.04 0.24 389 2028 1.0 0.98 1.4 27 < 0.005 10-04 0.31 0.34 0.03 0.07 0.11 — 587 587 0.02 0.02 0.40 594 2029 0.57 0.55 0-65 1.3 <0.005 10.02 015 [0-17 0.02 0.04 0.05 — 290 290 0.01 0.01 0.18 294 2.4. Operations Emissions Compared Against Thresholds 9/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 10 / 67 Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit.TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Unmit.14 14 3.4 45 0.09 0.09 8.4 8.5 0.09 2.1 2.2 96 11,711 11,807 10 0.39 25 12,205 Daily, Winter (Max) —————————————————— Unmit.13 13 3.5 32 0.09 0.09 8.4 8.5 0.08 2.1 2.2 96 11,317 11,413 10 0.41 3.4 11,795 Average Daily (Max) —————————————————— Unmit.14 14 3.6 40 0.09 0.09 8.3 8.4 0.09 2.1 2.2 96 10,743 10,839 10 0.40 12 11,228 Annual (Max) —————————————————— Unmit.2.6 2.5 0.66 7.3 0.02 0.02 1.5 1.5 0.02 0.38 0.40 16 1,779 1,795 1.7 0.07 2.0 1,859 2.5. Operations Emissions by Sector, Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Sector TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Mobile 4.4 4.0 2.8 34 0.09 0.05 8.4 8.4 0.05 2.1 2.2 —8,836 8,836 0.40 0.34 22 8,969 Area 10 10.0 0.10 11 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 0.00 772 772 0.05 0.01 —775 Energy 0.05 0.03 0.48 0.40 < 0.005 0.04 —0.04 0.04 —0.04 —2,021 2,021 0.14 0.01 —2,028 Water ———————————14 81 95 1.4 0.03 —141 Waste ———————————82 0.00 82 8.2 0.00 —289 Refrig.————————————————2.8 2.8 Total 14 14 3.4 45 0.09 0.09 8.4 8.5 0.09 2.1 2.2 96 11,711 11,807 10 0.39 25 12,205 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — Summer (Max) Unmit. [14 14 34 45 0.09 0.09 84 8.5 0.09 21 22 96 11,711 [11,807 (10 0.39 25 12,205 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Unmit. [13 13 3.5 32 0.09 0.09 84 8.5 0.08 21 22 96 11,317 (11,413 [10 0.41 34 11,795 Average |— — — — — — — — — — — — — — — — — — Daily (Max) Unmit. [14 14 3.6 40 0.09 0.09 8.3 84 0.09 21 22 96 10,743 (10,839 (10 0.40 12 11,228 Annual |[— — — — — — — — — — — — _ — _ _ _ _ | (Max) ! Unmit. "2.6 25 0.66 7.3 0.02 0.02 1.5 1.5 0.02 0.38 0.40 16 1,779 1,795 1.7 0.07 20 1,859 2.5. Operations Emissions by Sector, Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — Summer (Max) Mobile 4.4 4.0 28 34 0.09 0.05 8.4 8.4 0.05 2.1 22 — 8,836 8,836 0.40 0.34 22 8,969 Area 10 10.0 0.10 11 <0.005 |<0.005 |— <0.005 |<0.005 [— < 0.005 |0.00 772 772 0.05 0.01 — 775 Energy [0.05 0.03 0.48 0.40 < 0.005 |0.04 — 0.04 0.04 — 0.04 — 2,021 2,021 0.14 0.01 — 2,028 'Water — — — — — — — — — — — 14 81 95 1.4 0.03 — 141 Waste |— — — — — — — — — — — 82 0.00 82 8.2 0.00 — 289 Refrig. |— — — — — — — — — — — — — — — — 28 28 Total 14 14 34 45 0.09 0.09 8.4 8.5 0.09 2.1 22 96 11,711 [11,807 |10 0.39 25 12,205 10/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 11 / 67 Daily, Winter (Max) —————————————————— Mobile 4.4 3.9 3.1 31 0.08 0.05 8.4 8.4 0.05 2.1 2.2 —8,471 8,471 0.42 0.36 0.57 8,588 Area 9.1 9.1 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 0.00 743 743 0.05 0.01 —746 Energy 0.05 0.03 0.48 0.40 < 0.005 0.04 —0.04 0.04 —0.04 —2,021 2,021 0.14 0.01 —2,028 Water ———————————14 81 95 1.4 0.03 —141 Waste ———————————82 0.00 82 8.2 0.00 —289 Refrig.————————————————2.8 2.8 Total 13 13 3.5 32 0.09 0.09 8.4 8.5 0.08 2.1 2.2 96 11,317 11,413 10 0.41 3.4 11,795 Average Daily —————————————————— Mobile 4.3 3.9 3.1 32 0.08 0.05 8.3 8.3 0.05 2.1 2.2 —8,570 8,570 0.42 0.36 9.5 8,696 Area 9.7 9.7 0.07 7.4 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 0.00 71 71 < 0.005 < 0.005 —71 Energy 0.05 0.03 0.48 0.40 < 0.005 0.04 —0.04 0.04 —0.04 —2,021 2,021 0.14 0.01 —2,028 Water ———————————14 81 95 1.4 0.03 —141 Waste ———————————82 0.00 82 8.2 0.00 —289 Refrig.————————————————2.8 2.8 Total 14 14 3.6 40 0.09 0.09 8.3 8.4 0.09 2.1 2.2 96 10,743 10,839 10 0.40 12 11,228 Annual —————————————————— Mobile 0.79 0.71 0.56 5.9 0.02 0.01 1.5 1.5 0.01 0.38 0.39 —1,419 1,419 0.07 0.06 1.6 1,440 Area 1.8 1.8 0.01 1.4 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 0.00 12 12 < 0.005 < 0.005 —12 Energy 0.01 < 0.005 0.09 0.07 < 0.005 0.01 —0.01 0.01 —0.01 —335 335 0.02 < 0.005 —336 Water ———————————2.3 13 16 0.24 0.01 —23 Waste ———————————14 0.00 14 1.4 0.00 —48 Refrig.————————————————0.46 0.46 Total 2.6 2.5 0.66 7.3 0.02 0.02 1.5 1.5 0.02 0.38 0.40 16 1,779 1,795 1.7 0.07 2.0 1,859 3. Construction Emissions Details 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Mobile [4.4 3.9 3.1 31 0.08 0.05 8.4 8.4 0.05 2.1 22 — 8,471 8,471 0.42 0.36 0.57 8,588 Area 9.1 9.1 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 0.00 743 743 0.05 0.01 — 746 Energy [0.05 0.03 0.48 0.40 < 0.005 |0.04 — 0.04 0.04 — 0.04 — 2,021 2,021 0.14 0.01 — 2,028 'Water — — — — — — — — — — — 14 81 95 1.4 0.03 — 141 Waste |— — — — — — — — — — — 82 0.00 82 8.2 0.00 — 289 Refrig. |— — — — — — — — — — — — — — — — 28 28 Total 13 13 35 32 0.09 0.09 8.4 8.5 0.08 2.1 22 96 11,317 (11,413 |10 0.41 34 11,795 Average |— — — — — — — — — — — — — — — — — — Daily Mobile 14.3 3.9 3.1 32 0.08 0.05 8.3 8.3 0.05 2.1 22 — 8,570 8,570 0.42 0.36 9.5 8,696 'Area 9.7 9.7 0.07 74 <0.005 |<0.005 |— <0.005 |<0.005 [— < 0.005 |0.00 71 71 <0.005 |<0.005 |— 71 Energy [0.05 0.03 0.48 0.40 < 0.005 |0.04 — 0.04 0.04 — 0.04 — 2,021 2,021 0.14 0.01 — 2,028 'Water — — — — — — — — — — — 14 81 95 1.4 0.03 — 141 Waste |— — — — — — — — — — — 82 0.00 82 8.2 0.00 — 289 | Refrig. |— — — — — — — — — — — — — — — — 28 28 Total 14 14 3.6 40 0.09 0.09 8.3 8.4 0.09 2.1 22 96 10,743 (10,839 |10 0.40 12 11,228 Annual — — — — — — — — — — — — — — — — — — | Mobile [0.79 0.71 0.56 5.9 0.02 0.01 1.5 1.5 0.01 0.38 0.39 — 1,419 1,419 0.07 0.06 1.6 1,440 Area 1.8 1.8 0.01 1.4 <0.005 |<0.005 |— <0.005 |<0.005 [— < 0.005 |0.00 12 12 <0.005 1<0.005 |— 12 Energy 0.01 <0.005 |0.09 0.07 < 0.005 |0.01 — 0.01 0.01 — 0.01 — 335 335 0.02 <0.005 |— 336 'Water — — — — — — — — — — — 23 13 16 0.24 0.01 — 23 Waste |— — — — — — — — — — — 14 0.00 14 1.4 0.00 — 48 Refrig. |— — — — — — — — — — — — — — — — 0.46 0.46 Total 26 25 0.66 7.3 0.02 0.02 1.5 1.5 0.02 0.38 0.40 16 1,779 1,795 1.7 0.07 2.0 1,859 3. Construction Emissions Details 11/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 12 / 67 3.1. Roadway Paving (2029) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Off-Roa d Equipm ent 0.87 0.73 6.9 12 0.02 0.22 —0.22 0.20 —0.20 —1,767 1,767 0.07 0.01 —1,773 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Average Daily —————————————————— Off-Roa d Equipm ent 0.01 0.01 0.09 0.16 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —24 24 < 0.005 < 0.005 —24 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent < 0.005 < 0.005 0.02 0.03 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —4.0 4.0 < 0.005 < 0.005 —4.0 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 3.1. Roadway Paving (2029) - Unmitigated Onsite — — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Off-Roa (0.87 0.73 6.9 12 0.02 0.22 — 0.22 0.20 — 0.20 — 1,767 1,767 0.07 0.01 — 1,773 d 1 Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.01 0.01 0.09 0.16 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 24 24 <0.005 |<0.005 |— 24 1d 1 Equipm | ent Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 "truck ({Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa |< 0.005 [<0.005 (0.02 0.03 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 4.0 4.0 <0.005 |<0.005 |— 4.0 id 1 Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 (truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) 12/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 13 / 67 Worker 0.08 0.07 0.06 1.1 0.00 0.00 0.26 0.26 0.00 0.06 0.06 —257 257 < 0.005 0.01 0.67 260 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Average Daily —————————————————— Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —3.4 3.4 < 0.005 < 0.005 < 0.005 3.4 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —0.56 0.56 < 0.005 < 0.005 < 0.005 0.57 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.3. Demolition (2026) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.46 0.39 3.5 5.0 0.01 0.11 —0.11 0.10 —0.10 —715 715 0.03 0.01 —718 Demoliti on ——————3.8 3.8 —0.57 0.57 ——————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Worker |0.08 0.07 0.06 1.1 0.00 0.00 0.26 0.26 0.00 0.06 0.06 — 257 257 <0.005 |0.01 0.67 260 Vendor 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling ,0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Average |— — — — — — — — — — — — — — — — — — Daily Worker '<0.005 |<0.005 |<0.005 [0.01 0.00 0.00 < 0.005 |<0.005 |0.00 <0.005 |<0.005 |— 34 34 <0.005 |<0.005 |<0.005 [3.4 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual _ — — — — — — — — — — — — — — — — — Worker < 0.005 <0.005 |<0.005 |<0.005 [0.00 0.00 < 0.005 |<0.005 |0.00 <0.005 |<0.005 |— 0.56 0.56 <0.005 |<0.005 |<0.005 [0.57 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 (Hauling 0.00 0.00 0-00 0-00 0-00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 3.3. Demolition (2026) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Onsite — Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.46 0.39 3.5 5.0 0.01 0.11 — 0.11 0.10 — 0.10 — 715 715 0.03 0.01 — 718 d Equipm ent Demoliti |— — — — — — 3.8 3.8 — 0.57 0.57 — — — — — — — on 13/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 14 / 67 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.08 0.07 0.63 0.89 < 0.005 0.02 —0.02 0.02 —0.02 —129 129 0.01 < 0.005 —129 Demoliti on ——————0.68 0.68 —0.10 0.10 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.02 0.01 0.11 0.16 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —21 21 < 0.005 < 0.005 —21 Demoliti on ——————0.12 0.12 —0.02 0.02 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Worker 0.04 0.04 0.04 0.55 0.00 0.00 0.13 0.13 0.00 0.03 0.03 —128 128 0.01 < 0.005 0.01 130 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.64 0.11 12 4.1 0.07 0.14 2.9 3.0 0.14 0.78 0.92 —10,381 10,381 0.53 1.7 0.61 10,888 Average Daily —————————————————— Worker 0.01 0.01 0.01 0.10 0.00 0.00 0.02 0.02 0.00 0.01 0.01 —23 23 < 0.005 < 0.005 0.04 24 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.08 0.07 0.63 0.89 < 0.005 [0.02 — 0.02 0.02 — 0.02 — 129 129 0.01 <0.005 |— 129 od Equipm (ent Demoliti |— — — — — — 0.68 0.68 — 0.10 0.10 — — — — — — — [on I Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 ltruck ({Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.02 0.01 0.11 0.16 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 21 21 <0.005 |<0.005 |— 21 id Equipm ent Demoliti |— — — — — — 0.12 0.12 — 0.02 0.02 — — — — — — — [on Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 [truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Worker 0.04 0.04 0.04 0.55 0.00 0.00 0.13 0.13 0.00 0.03 0.03 — 128 128 0.01 <0.005 [0.01 130 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0-64 0.11 12 4.1 0.07 0.14 29 3.0 0.14 0.78 0.92 — 10,381 (10,381 (0.53 1.7 0.61 10,888 Average — — — — — — — — — — — — — — — — — — Daily Worker [0.01 0.01 0.01 0.10 0.00 0.00 0.02 0.02 0.00 0.01 0.01 — 23 23 <0.005 |<0.005 [0.04 24 Vendor [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 14/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 15 / 67 Hauling 0.12 0.02 2.2 0.74 0.01 0.02 0.51 0.54 0.02 0.14 0.16 —1,869 1,869 0.09 0.30 1.8 1,962 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 0.02 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —3.9 3.9 < 0.005 < 0.005 0.01 3.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.02 < 0.005 0.40 0.14 < 0.005 < 0.005 0.09 0.10 < 0.005 0.03 0.03 —309 309 0.02 0.05 0.30 325 3.5. Demolition (2027) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.44 0.37 3.4 5.0 0.01 0.09 —0.09 0.09 —0.09 —715 715 0.03 0.01 —718 Demoliti on ——————3.8 3.8 —0.57 0.57 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.05 0.04 0.40 0.57 < 0.005 0.01 —0.01 0.01 —0.01 —83 83 < 0.005 < 0.005 —83 Demoliti on ——————0.43 0.43 —0.07 0.07 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Hauling [0.12 0.02 22 0.74 0.01 0.02 0.51 0.54 0.02 0.14 0.16 — 1,869 1,869 0.09 0.30 1.8 1,962 Annual '— — — — — — — — — — — — — — — — — — Worker <0.005 |<0.005 |<0.005 [0.02 0.00 0.00 < 0.005 |<0.005 |0.00 <0.005 |<0.005 |— 3.9 39 <0.005 [<0.005 |0.01 3.9 Vendor {0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 (Hauling 0.02 < 0.005 0-40 0-14 < 0.005 |< 0.005 |0.09 0.10 < 0.005 |0.03 0.03 — 309 309 0.02 0.05 0.30 325 3.5. Demolition (2027) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.44 0.37 34 5.0 0.01 0.09 — 0.09 0.09 — 0.09 — 715 715 0.03 0.01 — 718 d Equipm (ent Demoliti |— — — — — — 3.8 3.8 — 0.57 0.57 — — — — — — — [on I Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa [0.05 0.04 0.40 0.57 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 83 83 <0.005 |<0.005 |— 83 od Equipm (ent Demoliti |— — — — — — 0.43 0.43 — 0.07 0.07 — — — — — — — on Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck 16/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 16 / 67 Annual —————————————————— Off-Roa d Equipm ent 0.01 0.01 0.07 0.10 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —14 14 < 0.005 < 0.005 —14 Demoliti on ——————0.08 0.08 —0.01 0.01 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Worker 0.04 0.03 0.04 0.51 0.00 0.00 0.13 0.13 0.00 0.03 0.03 —126 126 < 0.005 < 0.005 0.01 127 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.64 0.11 12 4.0 0.07 0.14 2.9 3.0 0.14 0.78 0.92 —10,174 10,174 0.46 1.7 0.57 10,680 Average Daily —————————————————— Worker < 0.005 < 0.005 < 0.005 0.06 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 —15 15 < 0.005 < 0.005 0.02 15 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.07 0.01 1.4 0.46 0.01 0.02 0.33 0.34 0.02 0.09 0.11 —1,175 1,175 0.05 0.19 1.1 1,234 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —2.4 2.4 < 0.005 < 0.005 < 0.005 2.5 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.01 < 0.005 0.25 0.08 < 0.005 < 0.005 0.06 0.06 < 0.005 0.02 0.02 —194 194 0.01 0.03 0.18 204 3.7. Site Preparation (2027) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Annual |[— — — — — — — — — — — — _ — _ _ _ _ Off-Roa (0.01 0.01 0.07 0.10 < 0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 14 14 <0.005 |<0.005 |— 14 id Equipm (ent Demoliti |— — — — — — 0.08 0.08 — 0.01 0.01 — — — — — — — [on Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 l truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Worker 10.04 0.03 0.04 0.51 0.00 0.00 0.13 0.13 0.00 0.03 0.03 — 126 126 <0.005 |<0.005 [0.01 127 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0-64 0.11 12 4.0 0.07 0.14 29 3.0 0.14 0.78 0.92 — 10,174 (10,174 (0.46 1.7 0.57 10,680 Average — — — — — — — — — — — — — — — — — — Daily Worker '<0.005 |<0.005 |<0.005 |0.06 0.00 0.00 0.01 0.01 0.00 <0.005 |<0.005 |— 15 15 <0.005 |<0.005 [0.02 15 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.07 0.01 1.4 0.46 0.01 0.02 0.33 0.34 0.02 0.09 0.11 — 1,175 1,175 0.05 0.19 1.1 1,234 Annual — — — — — — — — — — — — _ — _ _ _ _ Worker <0.005 |<0.005 |<0.005 [0.01 0.00 0.00 < 0.005 |<0.005 [0.00 <0.005 |<0.005 |— 24 24 <0.005 |<0.005 |<0.005 |2.5 Vendor {0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 l ;< < < < —(Hauling 0.01 0.005 0.25 [0-08 0.005 0.005 (0.06 0.06 0.005 0.02 0.02 194 194 0.01 0.03 0.18 204 3.7. Site Preparation (2027) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual)Location|106__[R0c_ [Nox [co [soz [Pwi0E [PwioD |Pwnor [Pw SE [Pu2 50 |Pu2T [Bco2 16/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 17 / 67 Onsite —————————————————— Daily, Summer (Max) —————————————————— Off-Roa d Equipm ent 0.12 0.10 0.99 1.9 < 0.005 0.03 —0.03 0.03 —0.03 —290 290 0.01 < 0.005 —291 Dust From Material Movement ——————0.00 0.00 —0.00 0.00 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Average Daily —————————————————— Off-Roa d Equipm ent 0.01 0.01 0.09 0.17 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —25 25 < 0.005 < 0.005 —26 Dust From Material Movement ——————0.00 0.00 —0.00 0.00 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent < 0.005 < 0.005 0.02 0.03 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —4.2 4.2 < 0.005 < 0.005 —4.2 Dust From Material Movement ——————0.00 0.00 —0.00 0.00 ——————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Onsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Off-Roa (0.12 0.10 0.99 1.9 < 0.005 |0.03 — 0.03 0.03 — 0.03 — 290 290 0.01 <0.005 |— 291 d 1 Equipm ent Dust — — — — — — 0.00 0.00 — 0.00 0.00 — — — — — — — From Material Movement 1Onsite 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.01 0.01 0.09 0.17 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 25 25 <0.005 |<0.005 |— 26 1d 1 Equipm ent Dust — — — — — — 0.00 0.00 — 0.00 0.00 — — — — — — — From Material Movement Onsite 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck | {Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa |< 0.005 [<0.005 (0.02 0.03 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 4.2 4.2 <0.005 |<0.005 |— 4.2 id 1 Equipm ent Dust — — — — — — 0.00 0.00 — 0.00 0.00 — — — — — — — From Material Movemerjt 17/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 18 / 67 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Worker 0.01 0.01 0.01 0.15 0.00 0.00 0.03 0.03 0.00 0.01 0.01 —33 33 < 0.005 < 0.005 0.10 34 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Average Daily —————————————————— Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —2.8 2.8 < 0.005 < 0.005 < 0.005 2.8 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —0.46 0.46 < 0.005 < 0.005 < 0.005 0.47 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.9. Grading (2027) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — — — — — — Daily, — — — — — — — — — — — — — — — — — Summer (Max) Worker '0.01 0.01 0.01 0.15 0.00 0.00 0.03 0.03 0.00 0.01 0.01 33 33 < 0.005 [<0.005 (0.10 34 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Daily, — — — — — — — — — — — — — — — — — Winter | (Max) T Average |— — — — — — — — — — — — — — — — — Daily Worker '< 0.005 |<0.005 [<0.005 [0.01 0.00 0.00 < 0.005 |<0.005 [0.00 < 0.005 |<0.005 2.8 2.8 < 0.005 |<0.005 [<0.005 (2.8 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — Worker <0.005 [<0.005 [<0.005 |<0.005 [0.00 0.00 < 0.005 |<0.005 [0.00 < 0.005 |<0.005 0.46 0.46 < 0.005 |<0.005 [<0.005 (0.47 | Vendor {0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 | T Hauling 0.00 0.00 | 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.9. Grading (2027) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Onsite Daily, Summer (Max) 18/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 19 / 67 2,388—0.020.102,3792,379—0.49—0.490.54—0.540.0213121.41.7Off-Roa d Equipm ent Dust From Material Movement ——————1.8 1.8 —0.89 0.89 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Average Daily —————————————————— Off-Roa d Equipm ent 0.25 0.21 1.8 2.0 < 0.005 0.08 —0.08 0.07 —0.07 —359 359 0.01 < 0.005 —360 Dust From Material Movement ——————0.28 0.28 —0.13 0.13 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.05 0.04 0.34 0.37 < 0.005 0.01 —0.01 0.01 —0.01 —59 59 < 0.005 < 0.005 —60 Dust From Material Movement ——————0.05 0.05 —0.02 0.02 ——————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Off-Roa (1.7 1.4 12 13 0.02 0.54 — 0.54 0.49 — 0.49 — 2,379 2,379 0.10 0.02 — 2,388 d Equipm ent Dust — — — — — — 1.8 1.8 — 0.89 0.89 — — — — — — — From Material Movemerit T Onsite 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa [0.25 0.21 1.8 20 < 0.005 |0.08 — 0.08 0.07 — 0.07 — 359 359 0.01 <0.005 |— 360 id 1 Equipm ent Dust — — — — — — 0.28 0.28 — 0.13 0.13 — — — — — — — From Material Movemerit Onsite 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck | {Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.05 0.04 0.34 0.37 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 59 59 <0.005 |<0.005 |— 60 'd 1 Equipm ent Dust — — — — — — 0.05 0.05 — 0.02 0.02 — — — — — — — From Material Movement Onsite 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ 19/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 20 / 67 Daily, Summer (Max) —————————————————— Worker 0.04 0.04 0.03 0.60 0.00 0.00 0.13 0.13 0.00 0.03 0.03 —133 133 0.01 < 0.005 0.41 135 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.08 0.02 1.3 0.53 0.01 0.02 0.32 0.33 0.02 0.09 0.10 —1,137 1,137 0.06 0.18 2.4 1,196 Daily, Winter (Max) —————————————————— Average Daily —————————————————— Worker 0.01 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 —19 19 < 0.005 < 0.005 0.03 20 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.01 < 0.005 0.21 0.08 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.02 —171 171 0.01 0.03 0.16 180 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —3.2 3.2 < 0.005 < 0.005 < 0.005 3.2 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 0.04 0.01 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 —28 28 < 0.005 < 0.005 0.03 30 3.11. Building Construction (2027) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — Summer (Max) Worker '0.04 0.04 0.03 0.60 0.00 0.00 0.13 0.13 0.00 0.03 0.03 133 133 0.01 < 0.005 |0.41 135 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.08 0.02 1.3 0.53 0.01 0.02 0.32 0.33 0.02 0.09 0.10 1,137 1,137 0.06 0.18 2.4 1,196 Daily, — — — — — — — — — — — — — — — — — Winter | (Max) Average |— — — — — — — — — — — — — — — — — Daily Worker 10.01 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 <0.005 |<0.005 |[— 19 19 < 0.005 |<0.005 [0.03 20 Vendor '0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.01 < 0.005 |0.21 0.08 < 0.005 |<0.005 [0.05 0.05 < 0.005 |0.01 0.02 — 171 171 0.01 0.03 0.16 180 Annual — — — — — — — — — — — — — — — — — — Worker <0.005 [<0.005 |<0.005 |0.01 0.00 0.00 < 0.005 |<0.005 [0.00 <0.005 |<0.005 [— 3.2 3.2 < 0.005 |<0.005 [<0.005 (3.2 Vendor 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling <0.005 <0.005 0.04 0.01 < 0.005 <0.005 0-01 0.01 <0.005 |<0.005 [<0.005 |— 28 28 < 0.005 |<0.005 [0.03 301 3.11. Building Construction (2027) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) PM10E (PM10D [PM10T [PM2.5E |PM2.5D |PM2.5T |BCO2 [NBCO2 |[CO2T Onsite — — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) 20/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 21 / 67 1,844—0.010.071,8381,838—0.24—0.240.26—0.260.029.27.30.810.97Off-Roa d Equipm ent Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.03 0.03 0.23 0.29 < 0.005 0.01 —0.01 0.01 —0.01 —58 58 < 0.005 < 0.005 —58 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.01 < 0.005 0.04 0.05 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —9.5 9.5 < 0.005 < 0.005 —9.6 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Worker 0.55 0.48 0.60 7.0 0.00 0.00 1.8 1.8 0.00 0.42 0.42 —1,744 1,744 0.02 0.07 0.15 1,764 Vendor 0.04 0.02 0.71 0.33 < 0.005 < 0.005 0.18 0.18 < 0.005 0.05 0.05 —635 635 0.03 0.09 0.04 662 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker 0.02 0.02 0.02 0.23 0.00 0.00 0.06 0.06 0.00 0.01 0.01 —55 55 < 0.005 < 0.005 0.08 56 Vendor < 0.005 < 0.005 0.02 0.01 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 —20 20 < 0.005 < 0.005 0.02 21 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Off-Roa (0.97 0.81 7.3 9.2 0.02 0.26 — 0.26 0.24 — 0.24 — 1,838 1,838 0.07 0.01 — 1,844 d Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.03 0.03 0.23 0.29 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 58 58 <0.005 |<0.005 |— 58 1d 1Equipm ent Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 "truck ( {Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.01 < 0.005 |0.04 0.05 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 9.5 9.5 <0.005 |<0.005 |— 9.6 id 1 Equipm | ent Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 (truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Worker 0.55 0.48 0.60 7.0 0.00 0.00 1.8 1.8 0.00 0.42 0.42 — 1,744 1,744 0.02 0.07 0.15 1,764 Vendor 0.04 0.02 0.71 0.33 <0.005 |<0.005 [0.18 0.18 < 0.005 [0.05 0.05 — 635 635 0.03 0.09 0.04 662 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker [0.02 0.02 0.02 0.23 0.00 0.00 0.06 0.06 0.00 0.01 0.01 — 55 55 <0.005 |<0.005 [0.08 56 Vendor |<0.005 |<0.005 |0.02 0.01 < 0.005 |<0.005 [0.01 0.01 <0.005 |<0.005 [<0.005 |— 20 20 <0.005 |<0.005 [0.02 21 21/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 22 / 67 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 0.04 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 —9.2 9.2 < 0.005 < 0.005 0.01 9.3 Vendor < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 —3.3 3.3 < 0.005 < 0.005 < 0.005 3.4 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.13. Building Construction (2028) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Off-Roa d Equipm ent 0.94 0.78 6.9 9.2 0.02 0.23 —0.23 0.21 —0.21 —1,839 1,839 0.07 0.01 —1,845 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.94 0.78 6.9 9.2 0.02 0.23 —0.23 0.21 —0.21 —1,839 1,839 0.07 0.01 —1,845 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.67 0.56 4.9 6.6 0.01 0.17 —0.17 0.15 —0.15 —1,317 1,317 0.05 0.01 —1,321 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Hauling [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual '— — — — — — — — — — — — — — — — — — Worker <0.005 |<0.005 |<0.005 [0.04 0.00 0.00 0.01 0.01 0.00 <0.005 |<0.005 |— 9.2 9.2 <0.005 [<0.005 |0.01 9.3 Vendor < 0.005 |<0.005 |<0.005 |<0.005 |<0.005 [<0.005 |[<0.005 |[<0.005 [<0.005 |<0.005 |<0.005 |— 33 33 <0.005 |<0.005 |<0.005 [3.4 [Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 3.13. Building Construction (2028) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Off-Roa (0.94 0.78 6.9 9.2 0.02 0.23 — 0.23 0.21 — 0.21 — 1,839 1,839 0.07 0.01 — 1,845 d 1 Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.94 0.78 6.9 9.2 0.02 0.23 — 0.23 0.21 — 0.21 — 1,839 1,839 0.07 0.01 — 1,845 d 1 Equipm | ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.67 0.56 49 6.6 0.01 0.17 — 0.17 0.15 — 0.15 — 1,317 1,317 0.05 0.01 — 1,321 d Equipm ent 22/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 23 / 67 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.12 0.10 0.90 1.2 < 0.005 0.03 —0.03 0.03 —0.03 —218 218 0.01 < 0.005 —219 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Worker 0.54 0.47 0.47 7.8 0.00 0.00 1.8 1.8 0.00 0.42 0.42 —1,806 1,806 0.02 0.07 5.1 1,831 Vendor 0.04 0.01 0.65 0.31 < 0.005 < 0.005 0.18 0.18 < 0.005 0.05 0.05 —620 620 0.02 0.09 1.6 648 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Worker 0.54 0.47 0.54 6.6 0.00 0.00 1.8 1.8 0.00 0.42 0.42 —1,713 1,713 0.02 0.07 0.13 1,733 Vendor 0.04 0.01 0.68 0.32 < 0.005 < 0.005 0.18 0.18 < 0.005 0.05 0.05 —620 620 0.02 0.09 0.04 647 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker 0.38 0.33 0.38 5.0 0.00 0.00 1.3 1.3 0.00 0.30 0.30 —1,245 1,245 0.02 0.05 1.6 1,261 Vendor 0.03 0.01 0.49 0.22 < 0.005 < 0.005 0.13 0.13 < 0.005 0.03 0.04 —444 444 0.02 0.06 0.48 464 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker 0.07 0.06 0.07 0.91 0.00 0.00 0.23 0.23 0.00 0.05 0.05 —206 206 < 0.005 0.01 0.26 209 Vendor 0.01 < 0.005 0.09 0.04 < 0.005 < 0.005 0.02 0.02 < 0.005 0.01 0.01 —74 74 < 0.005 0.01 0.08 77 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Onsite (0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck ‘Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.12 0.10 0.90 1.2 <0.005 [0.03 — 0.03 0.03 — 0.03 — 218 218 0.01 <0.005 |— 219 vd 1 Equipm ent Onsite (0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — — — — — — — Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Worker '0.54 0.47 0.47 7.8 0.00 0.00 1.8 1.8 0.00 0.42 0.42 — 1,806 1,806 0.02 0.07 5.1 1,831 Vendor 0.04 0.01 0.65 0.31 <0.005 |<0.005 [0.18 0.18 < 0.005 |0.05 0.05 — 620 620 0.02 0.09 1.6 648 Hauling ,0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily, |— — — — — — — — — — — — — — — — — — Winter (Max) Worker lo.54 0.47 0.54 6.6 0.00 0.00 1.8 1.8 0.00 0.42 0.42 — 1,713 1,713 0.02 0.07 0.13 1,733 Vendor 0.04 0.01 0.68 0.32 <0.005 |<0.005 [0.18 0.18 < 0.005 |0.05 0.05 — 620 620 0.02 0.09 0.04 647 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker 10.38 0.33 0.38 5.0 0.00 0.00 1.3 13 0.00 0.30 0.30 — 1,245 1,245 0.02 0.05 1.6 1,261 Vendor 0.03 0.01 0.49 0.22 <0.005 |<0.005 [0.13 0.13 < 0.005 |0.03 0.04 — 444 444 0.02 0.06 0.48 464 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — — Worker 0.07 0.06 0.07 0.91 0.00 0.00 0.23 0.23 0.00 0.05 0.05 — 206 206 < 0.005 [0.01 0.26 209 Vendor 0.01 < 0.005 |0.09 0.04 < 0.005 |<0.005 [0.02 0.02 < 0.005 [0.01 0.01 — 74 74 < 0.005 [0.01 0.08 77 Hauling [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 23/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 24 / 67 3.15. Building Construction (2029) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Off-Roa d Equipm ent 0.91 0.76 6.6 9.2 0.02 0.21 —0.21 0.20 —0.20 —1,838 1,838 0.07 0.01 —1,844 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.91 0.76 6.6 9.2 0.02 0.21 —0.21 0.20 —0.20 —1,838 1,838 0.07 0.01 —1,844 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.32 0.27 2.3 3.2 0.01 0.08 —0.08 0.07 —0.07 —651 651 0.03 0.01 —653 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.06 0.05 0.43 0.59 < 0.005 0.01 —0.01 0.01 —0.01 —108 108 < 0.005 < 0.005 —108 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 3.15. Building Construction (2029) - Unmitigated Onsite — — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Off-Roa (0.91 0.76 6.6 9.2 0.02 0.21 — 0.21 0.20 — 0.20 — 1,838 1,838 0.07 0.01 — 1,844 d 1 Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.91 0.76 6.6 9.2 0.02 0.21 — 0.21 0.20 — 0.20 — 1,838 1,838 0.07 0.01 — 1,844 d 1 Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.32 0.27 2.3 3.2 0.01 0.08 — 0.08 0.07 — 0.07 — 651 651 0.03 0.01 — 653 id 1Equipm ent Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 ‘truck ( {Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.06 0.05 0.43 0.59 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 108 108 <0.005 |<0.005 |— 108 d Equipm ent 24/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 25 / 67 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Worker 0.52 0.45 0.41 7.3 0.00 0.00 1.8 1.8 0.00 0.42 0.42 —1,776 1,776 0.02 0.07 4.6 1,800 Vendor 0.04 0.01 0.62 0.30 < 0.005 < 0.005 0.18 0.18 < 0.005 0.05 0.05 —604 604 0.02 0.09 1.5 632 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Worker 0.46 0.45 0.47 6.2 0.00 0.00 1.8 1.8 0.00 0.42 0.42 —1,684 1,684 0.02 0.07 0.12 1,704 Vendor 0.04 0.01 0.65 0.31 < 0.005 < 0.005 0.18 0.18 < 0.005 0.05 0.05 —604 604 0.02 0.09 0.04 631 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker 0.16 0.16 0.17 2.3 0.00 0.00 0.63 0.63 0.00 0.15 0.15 —605 605 0.01 0.02 0.71 613 Vendor 0.01 < 0.005 0.23 0.11 < 0.005 < 0.005 0.06 0.06 < 0.005 0.02 0.02 —214 214 0.01 0.03 0.23 223 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker 0.03 0.03 0.03 0.42 0.00 0.00 0.12 0.12 0.00 0.03 0.03 —100 100 < 0.005 < 0.005 0.12 101 Vendor < 0.005 < 0.005 0.04 0.02 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 —35 35 < 0.005 0.01 0.04 37 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.17. Paving (2027) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — — — — — — — Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Worker '0.52 0.45 0.41 7.3 0.00 0.00 1.8 1.8 0.00 0.42 0.42 — 1,776 1,776 0.02 0.07 4.6 1,800 Vendor 0.04 0.01 0.62 0.30 < 0.005 |<0.005 [0.18 0.18 < 0.005 |0.05 0.05 — 604 604 0.02 0.09 1.5 632 Hauling ,0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily, |— — — — — — — — — — — — — — — — — — Winter (Max) | Worker 10.46 0.45 0.47 6.2 0.00 0.00 1.8 1.8 0.00 0.42 0.42 — 1,684 1,684 0.02 0.07 0.12 1,704 Vendor 0.04 0.01 0.65 0.31 < 0.005 |<0.005 [0.18 0.18 < 0.005 |0.05 0.05 — 604 604 0.02 0.09 0.04 631 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker lo.16 0.16 0.17 2.3 0.00 0.00 0.63 0.63 0.00 0.15 0.15 — 605 605 0.01 0.02 0.71 613 Vendor "0.01 < 0.005 [0.23 0.11 < 0.005 |<0.005 [0.06 0.06 < 0.005 |0.02 0.02 — 214 214 0.01 0.03 0.23 223 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — — Worker 0.03 0.03 0.03 0.42 0.00 0.00 0.12 0.12 0.00 0.03 0.03 — 100 100 < 0.005 [<0.005 (0.12 101 | Vendor [< 0.005 |<0.005 [0.04 0.02 < 0.005 |<0.005 [0.01 0.01 < 0.005 |<0.005 [<0.005 |— 35 35 < 0.005 |0.01 0.04 37 | Hauling 0.00 0.00 ,0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 3.17. Paving (2027) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) PM10E (PM10D [PM10T [PM2.5E |PM2.5D |PM2.5T |BCO2 [NBCO2 |[CO2T Onsite — — — — — — — — — — — — _ — _ _ _ _ 25/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 26 / 67 ——————————————————Daily, Summer (Max) Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.44 0.37 3.5 5.0 0.01 0.15 —0.15 0.14 —0.14 —756 756 0.03 0.01 —758 Paving 0.14 0.14 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.03 0.02 0.21 0.30 < 0.005 0.01 —0.01 0.01 —0.01 —46 46 < 0.005 < 0.005 —46 Paving 0.01 0.01 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent < 0.005 < 0.005 0.04 0.06 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —7.6 7.6 < 0.005 < 0.005 —7.6 Paving < 0.005 < 0.005 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.44 0.37 3.5 5.0 0.01 0.15 — 0.15 0.14 — 0.14 — 756 756 0.03 0.01 — 758 «d Equipm entL Paving [0.14 0.14 — — — — — — — — — — — — — — — — Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.03 0.02 0.21 0.30 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 46 46 <0.005 |<0.005 |— 46 id ‘Equipm ent Paving [0.01 0.01 — — — — — — — — — — — — — — — _ Ll (Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck ({Annual |— — — — — — — — — — — _ _ — _ _ _ _ ,Off-Roa |< 0.005 [<0.005 (0.04 0.06 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 7.6 7.6 <0.005 |<0.005 |— 7.6 'd ‘Equipm entL Paving [<0.005 |<0.005 |— — — — — — — — — — — — — — — _ Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) 26/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 27 / 67 ——————————————————Daily, Winter (Max) Worker 0.03 0.03 0.03 0.38 0.00 0.00 0.10 0.10 0.00 0.02 0.02 —94 94 < 0.005 < 0.005 0.01 96 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker < 0.005 < 0.005 < 0.005 0.02 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 —5.8 5.8 < 0.005 < 0.005 0.01 5.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —0.96 0.96 < 0.005 < 0.005 < 0.005 0.98 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.19. Paving (2028) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.41 0.34 3.3 5.0 0.01 0.13 —0.13 0.12 —0.12 —756 756 0.03 0.01 —758 Paving 0.14 0.14 ———————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Worker 0.03 0.03 0.03 0.38 0.00 0.00 0.10 0.10 0.00 0.02 0.02 — 94 94 < 0.005 |<0.005 [0.01 96 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker '<0.005 |<0.005 [<0.005 |0.02 0.00 0.00 0.01 0.01 0.00 <0.005 |<0.005 |— 5.8 5.8 < 0.005 |<0.005 [0.01 5.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — — Worker <0.005 |<0.005 |<0.005 |<0.005 [0.00 0.00 < 0.005 |<0.005 [0.00 <0.005 |<0.005 |— 0.96 0.96 <0.005 |<0.005 |<0.005 |0.98 | Vendor {0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 | Hauling 0.00 0.00 | 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 3.19. Paving (2028) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Onsite — Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.41 0.34 3.3 5.0 0.01 0.13 — 0.13 0.12 — 0.12 — 756 756 0.03 0.01 — 758 d Equipm ent Paving [0.14 0.14 — — — — — — — — — — — — — — — — 27/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 28 / 67 0.000.000.000.000.000.00—0.000.000.000.000.000.000.000.000.000.000.00Onsite truck Average Daily —————————————————— Off-Roa d Equipm ent 0.05 0.04 0.38 0.57 < 0.005 0.01 —0.01 0.01 —0.01 —87 87 < 0.005 < 0.005 —88 Paving 0.02 0.02 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.01 0.01 0.07 0.10 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —14 14 < 0.005 < 0.005 —14 Paving < 0.005 < 0.005 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Worker 0.03 0.03 0.03 0.36 0.00 0.00 0.10 0.10 0.00 0.02 0.02 —93 93 < 0.005 < 0.005 0.01 94 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker < 0.005 < 0.005 < 0.005 0.04 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 —11 11 < 0.005 < 0.005 0.01 11 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa [0.05 0.04 0.38 0.57 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 87 87 <0.005 |<0.005 |— 88 1d 'Equipm ent L Paving [0.02 0.02 — — — — — — — — — — — — — — — _ Ll] (Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck ( {Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa (0.01 0.01 0.07 0.10 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 14 14 <0.005 |<0.005 |— 14 id *Equipm entL Paving [<0.005 |<0.005 |— — — — — — — — — — — — — — — — ‘Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Worker '0.03 0.03 0.03 0.36 0.00 0.00 0.10 0.10 0.00 0.02 0.02 — 93 93 <0.005 |<0.005 [0.01 94 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker '<0.005 |<0.005 |<0.005 [0.04 0.00 0.00 0.01 0.01 0.00 <0.005 |<0.005 |— 11 11 <0.005 |<0.005 [0.01 11 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 28/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 29 / 67 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —1.8 1.8 < 0.005 < 0.005 < 0.005 1.8 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.21. Architectural Coating (2027) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.27 0.23 1.7 2.3 < 0.005 0.04 —0.04 0.04 —0.04 —267 267 0.01 < 0.005 —268 Architect ural Coating s 5.9 5.9 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.01 0.01 0.05 0.07 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —8.4 8.4 < 0.005 < 0.005 —8.4 Architect ural Coating s 0.18 0.18 ———————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Annual |— — — — — — — — — — — — — — — — — — Worker '<0.005 |<0.005 |<0.005 [0.01 0.00 0.00 < 0.005 |<0.005 |0.00 <0.005 |<0.005 |— 1.8 1.8 <0.005 |<0.005 |<0.005 [1.8 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 (Hauling 10.00 0.00 0.00 0.00 0-00 BN 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 3.21. Architectural Coating (2027) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.27 0.23 1.7 23 < 0.005 |0.04 — 0.04 0.04 — 0.04 — 267 267 0.01 <0.005 |— 268 d Equipm ent Architect|5.9 5.9 — — — — — — — — — — — _ — — _ _ (ural 1Coating S| ‘Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 | truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.01 0.01 0.05 0.07 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 8.4 8.4 <0.005 |<0.005 |— 8.4 1d Equipm ent Architect |0.18 0.18 — — — — — — — — — — — — — — _ _ ural Coating s 29/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 30 / 67 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —1.4 1.4 < 0.005 < 0.005 —1.4 Architect ural Coating s 0.03 0.03 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Daily, Winter (Max) —————————————————— Worker 0.11 0.10 0.12 1.4 0.00 0.00 0.36 0.36 0.00 0.08 0.08 —349 349 < 0.005 0.01 0.03 353 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker < 0.005 < 0.005 < 0.005 0.05 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 —11 11 < 0.005 < 0.005 0.02 11 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —1.8 1.8 < 0.005 < 0.005 < 0.005 1.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck tAnnual |— — — — — — — — — — — — — — — — — — ,Off-Roa |< 0.005 [<0.005 (0.01 0.01 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 1.4 1.4 <0.005 |<0.005 |— 1.4 id Equipm ent Architect|0.03 0.03 — — — — — — — — — — — — — — _ _ (ural (Coating S| uk 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Worker '0.11 0.10 0.12 1.4 0.00 0.00 0.36 0.36 0.00 0.08 0.08 — 349 349 <0.005 [0.01 0.03 353 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker '<0.005 |<0.005 |<0.005 [0.05 0.00 0.00 0.01 0.01 0.00 <0.005 |<0.005 |— 11 11 <0.005 |<0.005 [0.02 11 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — _ — _ _ _ _ Worker <0.005 |<0.005 |<0.005 [0.01 0.00 0.00 < 0.005 |<0.005 [0.00 <0.005 |<0.005 |— 1.8 1.8 <0.005 |<0.005 |<0.005 [1.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 30/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 31 / 67 3.23. Architectural Coating (2028) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Off-Roa d Equipm ent 0.26 0.21 1.6 2.2 < 0.005 0.03 —0.03 0.03 —0.03 —267 267 0.01 < 0.005 —268 Architect ural Coating s 5.9 5.9 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.26 0.21 1.6 2.2 < 0.005 0.03 —0.03 0.03 —0.03 —267 267 0.01 < 0.005 —268 Architect ural Coating s 5.9 5.9 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Off-Roa d Equipm ent 0.19 0.15 1.2 1.6 < 0.005 0.02 —0.02 0.02 —0.02 —191 191 0.01 < 0.005 —192 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 3.23. Architectural Coating (2028) - Unmitigated Onsite — — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Off-Roa (0.26 0.21 1.6 2.2 < 0.005 |0.03 — 0.03 0.03 — 0.03 — 267 267 0.01 <0.005 |— 268 od Equipm ent Architect|5.9 5.9 — — — — — — — — — — — _ — — _ _ (ural (Coating S| Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.26 0.21 1.6 2.2 < 0.005 |0.03 — 0.03 0.03 — 0.03 — 267 267 0.01 <0.005 |— 268 «d Equipm ent Architect|5.9 5.9 — — — — — — — — — — — — — — _ _ ural (Coating S| ‘Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 | truck Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.19 0.15 1.2 1.6 < 0.005 [0.02 — 0.02 0.02 — 0.02 — 191 191 0.01 <0.005 |— 192 d Equipm ent 31/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 32 / 67 Architect Coatings 4.2 4.2 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.03 0.03 0.21 0.29 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —32 32 < 0.005 < 0.005 —32 Architect ural Coating s 0.77 0.77 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Worker 0.11 0.09 0.09 1.6 0.00 0.00 0.36 0.36 0.00 0.08 0.08 —361 361 < 0.005 0.01 1.0 366 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Worker 0.11 0.09 0.11 1.3 0.00 0.00 0.36 0.36 0.00 0.08 0.08 —343 343 < 0.005 0.01 0.03 347 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker 0.08 0.07 0.08 0.99 0.00 0.00 0.26 0.26 0.00 0.06 0.06 —249 249 < 0.005 0.01 0.32 252 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Architect |4.2 4.2 — — —_ — — — — — — — — — — — — — Coatings Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck | | {Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.03 0.03 0.21 0.29 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 32 32 <0.005 |<0.005 |— 32 id Equipm ent Architect [0.77 0.77 — — — — — — — — — — — — — — _ _ (ural (Coating S| uk 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Worker '0.11 0.09 0.08 1.6 0.00 0.00 0.36 0.36 0.00 0.08 0.08 — 361 361 <0.005 [0.01 1.0 366 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily, |— — — — — — — — — — — — — — — — — — 1Winter (Max) Worker lo.11 0.09 0.11 1.3 0.00 0.00 0.36 0.36 0.00 0.08 0.08 — 343 343 <0.005 [0.01 0.03 347 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker 10.08 0.07 0.08 0.99 0.00 0.00 0.26 0.26 0.00 0.06 0.06 — 249 249 <0.005 [0.01 0.32 252 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual |[— — — — — — — — — — — — _ — _ _ _ _ 32/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 33 / 67 Worker 0.01 0.01 0.01 0.18 0.00 0.00 0.05 0.05 0.00 0.01 0.01 —41 41 < 0.005 < 0.005 0.05 42 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.25. Architectural Coating (2029) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Off-Roa d Equipm ent 0.25 0.20 1.6 2.2 < 0.005 0.03 —0.03 0.02 —0.02 —267 267 0.01 < 0.005 —268 Architect ural Coating s 5.9 5.9 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.25 0.20 1.6 2.2 < 0.005 0.03 —0.03 0.02 —0.02 —267 267 0.01 < 0.005 —268 Architect ural Coating s 5.9 5.9 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Worker [0.01 0.01 0.01 0.18 0.00 0.00 0.05 0.05 0.00 0.01 0.01 — MH MH <0.005 |<0.005 [0.056 42 Vendor [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 (Hauling 0.00 0.00 0.00 0.00 0.00 000 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 3.25. Architectural Coating (2029) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) PM10E (PM10D [PM10T [PM2.5E |PM2.5D |PM2.5T |BCO2 [NBCO2 |[CO2T Onsite — — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Off-Roa [0.25 0.20 1.6 2.2 < 0.005 |0.03 — 0.03 0.02 — 0.02 — 267 267 0.01 <0.005 |— 268 od Equipm ent Architect|5.9 5.9 — — — — — — — — — — — _ — — _ _ (ural (Coating S| Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa [0.25 0.20 1.6 2.2 < 0.005 |0.03 — 0.03 0.02 — 0.02 — 267 267 0.01 <0.005 |— 268 «d Equipm ent Architect | 5.9 5.9 — — — — — — — — — — — — — — _ _ (ural (Coating s Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck 33/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 34 / 67 ——————————————————Average Daily Off-Roa d Equipm ent 0.10 0.09 0.66 0.93 < 0.005 0.01 —0.01 0.01 —0.01 —111 111 < 0.005 < 0.005 —112 Architect ural Coating s 2.4 2.4 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.02 0.02 0.12 0.17 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —18 18 < 0.005 < 0.005 —18 Architect ural Coating s 0.45 0.45 ———————————————— Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Worker 0.10 0.09 0.08 1.5 0.00 0.00 0.36 0.36 0.00 0.08 0.08 —355 355 < 0.005 0.01 0.92 360 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Worker 0.09 0.09 0.09 1.2 0.00 0.00 0.36 0.36 0.00 0.08 0.08 —337 337 < 0.005 0.01 0.02 341 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.10 0.09 0.66 0.93 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 111 111 <0.005 |<0.005 |— 112 1d Equipm ent Architect|2.4 24 — — — — — — — — — — _ — — _ _ _ (ural (Coating S|A) Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck [{Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.02 0.02 0.12 0.17 <0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 18 18 <0.005 |<0.005 |— 18 id Equipm ent Architect [0.45 0.45 — — — — — — — — — — _ — — _ _ _ (ural 1Coating S| uk 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Worker '0.10 0.09 0.08 1.5 0.00 0.00 0.36 0.36 0.00 0.08 0.08 — 355 355 <0.005 [0.01 0.92 360 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily, |— — — — — — — — — — — — — — — — — — Winter (Max) | Worker [0.09 0.09 0.08 1.2 0.00 0.00 0.36 0.36 0.00 0.08 0.08 — 337 337 <0.005 [0.01 0.02 311 Vendor [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 34/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 35 / 67 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker 0.04 0.04 0.04 0.54 0.00 0.00 0.15 0.15 0.00 0.03 0.03 —142 142 < 0.005 0.01 0.17 144 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Worker 0.01 0.01 0.01 0.10 0.00 0.00 0.03 0.03 0.00 0.01 0.01 —24 24 < 0.005 < 0.005 0.03 24 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 3.27. Infrastructure Improvements (2027) - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite —————————————————— Daily, Summer (Max) —————————————————— Off-Roa d Equipm ent 0.51 0.43 3.7 5.1 0.01 0.10 —0.10 0.09 —0.09 —742 742 0.03 0.01 —744 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Off-Roa d Equipm ent 0.51 0.43 3.7 5.1 0.01 0.10 —0.10 0.09 —0.09 —742 742 0.03 0.01 —744 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Hauling [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average |— — — — — — — — — — — — — — — — — — Daily Worker 10.04 0.04 0.04 0.54 0.00 0.00 0.15 0.15 0.00 0.03 0.03 — 142 142 <0.005 |0.01 0.17 144 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual _ — — — — — — — — — — — — — — — — — Worker 0.01 0.01 0.01 0.10 0.00 0.00 0.03 0.03 0.00 0.01 0.01 — 24 24 <0.005 |<0.005 |0.03 24 Vendor 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 [Hauiing 0.00 0.00 _0.00 0.00 0.00 0.00 0-00 (0-00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 3.27. Infrastructure Improvements (2027) - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) PM10E (PM10D [PM10T [PM2.5E |PM2.5D |PM2.5T |BCO2 [NBCO2 |[CO2T Onsite — — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Off-Roa (0.51 0.43 3.7 5.1 0.01 0.10 — 0.10 0.09 — 0.09 — 742 742 0.03 0.01 — 744 d 1 Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Off-Roa (0.51 0.43 3.7 5.1 0.01 0.10 — 0.10 0.09 — 0.09 — 742 742 0.03 0.01 — 744 «d 1 Equipm ent Onsite [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 truck 35/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 36 / 67 Average Daily —————————————————— Off-Roa d Equipm ent 0.14 0.11 0.98 1.4 < 0.005 0.03 —0.03 0.03 —0.03 —199 199 0.01 < 0.005 —200 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— Off-Roa d Equipm ent 0.03 0.02 0.18 0.25 < 0.005 0.01 —0.01 < 0.005 —< 0.005 —33 33 < 0.005 < 0.005 —33 Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Offsite —————————————————— Daily, Summer (Max) —————————————————— Worker 0.03 0.03 0.03 0.45 0.00 0.00 0.10 0.10 0.00 0.02 0.02 —100 100 < 0.005 < 0.005 0.31 101 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter (Max) —————————————————— Worker 0.03 0.03 0.03 0.38 0.00 0.00 0.10 0.10 0.00 0.02 0.02 —94 94 < 0.005 < 0.005 0.01 96 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Average Daily —————————————————— Worker 0.01 0.01 0.01 0.11 0.00 0.00 0.03 0.03 0.00 0.01 0.01 —26 26 < 0.005 < 0.005 0.04 26 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Annual —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Average |— — — — — — — — — — — — — — — — — — Daily Off-Roa (0.14 0.11 0.98 1.4 < 0.005 |0.03 — 0.03 0.03 — 0.03 — 199 199 0.01 <0.005 |— 200 1d 1Equipm | ent Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 ‘truck ({Annual |— — — — — — — — — — — — — — — — — — ,Off-Roa [0.03 0.02 0.18 0.25 < 0.005 [0.01 — 0.01 <0.005 |— <0.005 |— 33 33 <0.005 |<0.005 |— 33 id 1 Equipm | ent Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 (truck Offsite |— — — — — — — — — — — — _ — _ _ _ _ Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Worker '0.03 0.03 0.03 0.45 0.00 0.00 0.10 0.10 0.00 0.02 0.02 — 100 100 <0.005 |<0.005 [0.31 101 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily, |— — — — — — — — — — — — — — — — — — Winter (Max) | Worker 10.03 0.03 0.03 0.38 0.00 0.00 0.10 0.10 0.00 0.02 0.02 — 94 94 <0.005 |<0.005 [0.01 96 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0-00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average — — — — — — — — — — — — — — — — — — Daily Worker 10.01 0.01 0.01 0.11 0.00 0.00 0.03 0.03 0.00 0.01 0.01 — 26 26 <0.005 |<0.005 [0.04 26 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual |[— — — — — — — — — — — — _ — _ _ _ _ 36/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 37 / 67 Worker < 0.005 < 0.005 < 0.005 0.02 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 —4.3 4.3 < 0.005 < 0.005 0.01 4.3 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 4. Operations Emissions Details 4.1. Mobile Emissions by Land Use 4.1.1. Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Condo/T ownhou se 4.4 4.0 2.8 34 0.09 0.05 8.4 8.4 0.05 2.1 2.2 —8,836 8,836 0.40 0.34 22 8,969 Recreati onal Swimmi ng Pool 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Other Non-Asphalt Surfaces 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Total 4.4 4.0 2.8 34 0.09 0.05 8.4 8.4 0.05 2.1 2.2 —8,836 8,836 0.40 0.34 22 8,969 Daily, Winter (Max) —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Worker |<0.005 |<0.0056 |<0.005 [0.02 0.00 0.00 < 0.005 |<0.005 [0.00 <0.005 |<0.005 |— 4.3 4.3 <0.005 |<0.005 [0.01 4.3 Vendor [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 4. Operations Emissions Details 4.1. Mobile Emissions by Land Use 4.1.1. Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Use Daily, — Summer (Max) Condo/T [4.4 4.0 2.8 34 0.09 0.05 8.4 8.4 0.05 2.1 2.2 — 8,836 8,836 0.40 0.34 22 8,969 ownhou se Recreati [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 onal Swimmi ng Pool Other 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Non-Asphalt Surfaces Parking 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —_ 0.00 0.00 0.00 0.00 0.00 0.00 Lot Total 4.4 4.0 28 34 0.09 0.05 84 84 0.05 21 22 — 8,836 8,836 0.40 0.34 22 8,969 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) 371/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 38 / 67 8,5880.570.360.428,4718,471—2.22.10.058.48.40.050.08313.13.94.4Condo/T ownhou se Recreati onal Swimmi ng Pool 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Other Non-Asphalt Surfaces 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Total 4.4 3.9 3.1 31 0.08 0.05 8.4 8.4 0.05 2.1 2.2 —8,471 8,471 0.42 0.36 0.57 8,588 Annual —————————————————— Condo/T ownhou se 0.79 0.71 0.56 5.9 0.02 0.01 1.5 1.5 0.01 0.38 0.39 —1,419 1,419 0.07 0.06 1.6 1,440 Recreati onal Swimmi ng Pool 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Other Non-Asphalt Surfaces 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 0.00 0.00 0.00 0.00 Total 0.79 0.71 0.56 5.9 0.02 0.01 1.5 1.5 0.01 0.38 0.39 —1,419 1,419 0.07 0.06 1.6 1,440 4.2. Energy 4.2.1. Electricity Emissions By Land Use - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Condo/T (4.4 3.9 3.1 31 0.08 0.05 8.4 8.4 0.05 2.1 2.2 — 8,471 8,471 0.42 0.36 0.57 8,588 ownhou se Recreati [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 onal Swimmi ng Pool Other 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Non-Asphalt Surfaces Parking 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 —_ 0.00 0.00 0.00 0.00 0.00 0.00 Lot | otal 4.4 3.9 3.1 31 0.08 0.05 84 84 0.05 21 22 — 8,471 8,471 0.42 0.36 0.57 8,588 Annual |[— — — — — — — — — — — — _ — _ _ _ _ +Condo/T [0.79 0.71 0.56 5.9 0.02 0.01 1.5 15 0.01 0.38 0.39 — 1,419 1,419 0.07 0.06 1.6 1,440 ownhou | se | Recreati [0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 onal Swimmi ng Pool Other 10.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Non-Asphalt Surfaces Parking 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Lot Total lo.79 0.71 0.56 5.9 0.02 0.01 1.5 1.5 0.01 0.38 0.39 — 1,419 1.419 0.07 0.06 1.6 1,440 4.2. Energy 4.2 1. Electricity Emissions By Land Use - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) 38/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 39 / 67 CO2eRN2OCH4CO2TNBCO2BCO2PM2.5TPM2.5DPM2.5EPM10TPM10DPM10ESO2CONOxROGTOGLand Use Daily, Summer (Max) —————————————————— Condo/T ownhou se ————————————1,281 1,281 0.08 0.01 —1,286 Recreati onal Swimmi ng Pool ————————————0.00 0.00 0.00 0.00 —0.00 Other Non-Asphalt Surfaces ————————————0.00 0.00 0.00 0.00 —0.00 Parking Lot ————————————167 167 0.01 < 0.005 —168 Total ————————————1,448 1,448 0.09 0.01 —1,454 Daily, Winter (Max) —————————————————— Condo/T ownhou se ————————————1,281 1,281 0.08 0.01 —1,286 Recreati onal Swimmi ng Pool ————————————0.00 0.00 0.00 0.00 —0.00 Other Non-Asphalt Surfaces ————————————0.00 0.00 0.00 0.00 —0.00 Parking Lot ————————————167 167 0.01 < 0.005 —168 Total ————————————1,448 1,448 0.09 0.01 —1,454 Annual —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Use Daily, — Summer (Max) Condo/T |— — — — — — — — — — — — 1,281 [1,281 [0.08 |0.01 — 1,286 ownhou se Recreati |[— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 onal Swimmi ng Pool Other [— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 167 167 0.01 <0.005 |— 168 Lot Total |— — — — — — — — — — — — 1,448 |1,448 [0.09 |0.01 — 1,454 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Condo/T |— — — — — — — — — — — — 1,281 [1,281 [0.08 |0.01 — 1,286 ownhou se Recreati |[— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 onal Swimmi ng Pool Other [— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 167 167 0.01 <0.005 |— 168 Lot Total |— — — — — — — — — — — — 1,448 |1,448 [0.09 |0.01 — 1,454 Annual |[— — — — — — — — — — — — _ — _ _ _ _ 39/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 40 / 67 Condo/T ————————————212 212 0.01 < 0.005 —213 Recreati onal Swimmi ng Pool ————————————0.00 0.00 0.00 0.00 —0.00 Other Non-Asphalt Surfaces ————————————0.00 0.00 0.00 0.00 —0.00 Parking Lot ————————————28 28 < 0.005 < 0.005 —28 Total ————————————240 240 0.01 < 0.005 —241 4.2.3. Natural Gas Emissions By Land Use - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Condo/T ownhou se 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Recreati onal Swimmi ng Pool 0.05 0.03 0.48 0.40 < 0.005 0.04 —0.04 0.04 —0.04 —573 573 0.05 < 0.005 —575 Other Non-Asphalt Surfaces 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Total 0.05 0.03 0.48 0.40 < 0.005 0.04 —0.04 0.04 —0.04 —573 573 0.05 < 0.005 —575 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Condo/T |— — — — — — — — — — — — 212 212 0.01 <0.005 |— 213 Recreati [— — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 onal Swimmi ng Pool Other — — — — — — — — — — — — 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking |— — — — — — — — — — — — 28 28 < 0.005 |<0.005 [— 28 Lot Total — — — — — — — — — — — — 240 240 0.01 <0.005 |— 241 4.2.3. Natural Gas Emissions By Land Use - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Use Daily, — _ Summer (Max) Condo/T 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 ownhou | se | Recreati |0.05 0.03 0.48 0.40 <0.005 [0.04 — 0.04 0.04 — 0.04 — 573 573 0.05 <0.005 |— 575 onal Swimmi ng Pool Other 10.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking 0.00 0.00 0.00 0.00 0.00 0.00 —_ 0.00 0.00 —_ 0.00 —_ 0.00 0.00 0.00 0.00 —_ 0.00 Lot Total 0.05 0.03 0.48 0.40 < 0.005 |0.04 — 0.04 0.04 — 0.04 — 573 573 0.05 <0.005 |— 575 40/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 41 / 67 ——————————————————Daily, Winter (Max) Condo/T ownhou se 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Recreati onal Swimmi ng Pool 0.05 0.03 0.48 0.40 < 0.005 0.04 —0.04 0.04 —0.04 —573 573 0.05 < 0.005 —575 Other Non-Asphalt Surfaces 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Total 0.05 0.03 0.48 0.40 < 0.005 0.04 —0.04 0.04 —0.04 —573 573 0.05 < 0.005 —575 Annual —————————————————— Condo/T ownhou se 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Recreati onal Swimmi ng Pool 0.01 < 0.005 0.09 0.07 < 0.005 0.01 —0.01 0.01 —0.01 —95 95 0.01 < 0.005 —95 Other Non-Asphalt Surfaces 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 —0.00 0.00 0.00 0.00 —0.00 Total 0.01 < 0.005 0.09 0.07 < 0.005 0.01 —0.01 0.01 —0.01 —95 95 0.01 < 0.005 —95 4.3. Area Emissions by Source 4.3.1. Unmitigated 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Condo/T [0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 ownhou | se | Recreati |0.05 0.03 0.48 0.40 <0.005 [0.04 — 0.04 0.04 — 0.04 — 573 573 0.05 <0.005 |— 575 onal Swimmi ng Pool Other 10.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking 0.00 0.00 0.00 0.00 0.00 0.00 —_ 0.00 0.00 —_ 0.00 —_ 0.00 0.00 0.00 0.00 —_ 0.00 Lot otal 0.05 0.03 0.48 0.40 < 0.005 |0.04 — 0.04 0.04 — 0.04 — 573 573 0.05 <0.005 |— 575 Annual |— — — — — — — — — — — — — — — — — — 1Condo/T [0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 ownhou | se | Recreati [0.01 < 0.005 [0.09 0.07 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 95 95 0.01 <0.005 |— 95 onal Swimmi ng Pool Other 10.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 — 0.00 0.00 0.00 0.00 — 0.00 Lot Total l0.01 <0.005 '0.09 0.07 < 0.005 [0.01 — 0.01 0.01 — 0.01 — 95 95 0.01 <0.005 |— 95 4.3. Area Emissions by Source 4.3.1. Unmitigated 41/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 42 / 67 Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Source TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Hearths 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 0.00 743 743 0.05 0.01 —746 Consum er Product s 8.4 8.4 ———————————————— Architect ural Coating s 0.68 0.68 ———————————————— Landsca pe Equipm ent 0.99 0.94 0.10 11 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —29 29 < 0.005 < 0.005 —29 Total 10 10.0 0.10 11 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 0.00 772 772 0.05 0.01 —775 Daily, Winter (Max) —————————————————— Hearths 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 0.00 743 743 0.05 0.01 —746 Consum er Product s 8.4 8.4 ———————————————— Architect ural Coating s 0.68 0.68 ———————————————— Total 9.1 9.1 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 0.00 743 743 0.05 0.01 —746 Annual —————————————————— Hearths 0.00 0.00 0.00 0.00 0.00 0.00 —0.00 0.00 —0.00 0.00 8.4 8.4 < 0.005 < 0.005 —8.5 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Hearths |0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 0.00 743 743 0.05 0.01 — 746 Consum (8.4 84 —_ —_ — — — — — — — — — — — — _ _ | er | Product s Architect |0.68 0.68 — — — — — — — — — — — — — — _ _ ural Coating s Landsca [0.99 0.94 0.10 11 < 0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 29 29 <0.005 |<0.005 |— 29 [pe ‘Equipm ent Total 10 10.0 0.10 11 <0.005 |<0.005 |— <0.005 |<0.005 [— <0.005 [0.00 772 772 0.05 0.01 — 775 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Hearths [0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 0.00 743 743 0.05 0.01 — 746 Consum (8.4 84 —_ —_ — — — — — — — — — — — — _ _ | er | Product s Architect [0.68 0.68 — — — — — — — — — — — _ — — _ _ ural Coating sI | Total 9.1 9.1 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 0.00 743 743 0.05 0.01 — 746 Annual |— — — — — — — — — — — — — — — — — — Hearths [0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00 0.00 8.4 8.4 <0.005 |<0.005 |— 8.5 42/ 67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 43 / 67 ————————————————1.51.5Consum er Product Architect ural Coating s 0.12 0.12 ———————————————— Landsca pe Equipm ent 0.12 0.12 0.01 1.4 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 —3.3 3.3 < 0.005 < 0.005 —3.3 Total 1.8 1.8 0.01 1.4 < 0.005 < 0.005 —< 0.005 < 0.005 —< 0.005 0.00 12 12 < 0.005 < 0.005 —12 4.4. Water Emissions by Land Use 4.4.1. Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Condo/T ownhou se ———————————14 80 94 1.4 0.03 —139 Recreati onal Swimmi ng Pool ———————————0.24 1.2 1.5 0.02 < 0.005 —2.3 Other Non-Asphalt Surfaces ———————————0.00 0.14 0.14 < 0.005 < 0.005 —0.14 Parking Lot ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Total ———————————14 81 95 1.4 0.03 —141 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Consum |1.5 1.5 — — — — — — — — — — — _ — — _ _ er Product Architect |0.12 0.12 — — — — — — — — — — — — — — _ _ rural Coating s Landsca [0.12 0.12 0.01 1.4 < 0.005 |<0.005 |— <0.005 |<0.005 |[— <0.005 |— 3.3 33 <0.005 |<0.005 |— 33 [pe ‘Equipm ent Total 1.8 1.8 0.01 1.4 <0.005 |<0.005 |— <0.005 |<0.005 [— <0.005 [0.00 12 12 <0.005 |<0.005 |— 12 4.4. Water Emissions by Land Use 4.4.1. Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Use Daily, — — Summer (Max) Condo/T |— — — — — — — — — — — 14 80 94 1.4 0.03 — 139 ownhou se Recreati |[— — — — — — — — — — — 0.24 1.2 1.5 0.02 <0.005 |— 2.3 onal Swimmi ng Pool Other [— — — — — — — — — — — 0.00 0.14 0.14 <0.005 |<0.005 |— 0.14 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 0.00 0.00 0.00 0.00 0.00 —_ 0.00 Lot Total — — — — — — — — — — — 14 81 95 1.4 0.03 — 141 43/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 44 / 67 Daily, Winter (Max) —————————————————— Condo/T ownhou se ———————————14 80 94 1.4 0.03 —139 Recreati onal Swimmi ng Pool ———————————0.24 1.2 1.5 0.02 < 0.005 —2.3 Other Non-Asphalt Surfaces ———————————0.00 0.14 0.14 < 0.005 < 0.005 —0.14 Parking Lot ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Total ———————————14 81 95 1.4 0.03 —141 Annual —————————————————— Condo/T ownhou se ———————————2.3 13 15 0.23 0.01 —23 Recreati onal Swimmi ng Pool ———————————0.04 0.20 0.24 < 0.005 < 0.005 —0.37 Other Non-Asphalt Surfaces ———————————0.00 0.02 0.02 < 0.005 < 0.005 —0.02 Parking Lot ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Total ———————————2.3 13 16 0.24 0.01 —23 4.5. Waste Emissions by Land Use 4.5.1. Unmitigated 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Condo/T |— — — — — — — — — — — 14 80 94 1.4 0.03 — 139 ownhou se Recreati |[— — — — — — — — — — — 0.24 1.2 1.5 0.02 <0.005 |— 2.3 onal Swimmi ng Pool Other [— — — — — — — — — — — 0.00 0.14 0.14 <0.005 |<0.005 |— 0.14 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 0.00 0.00 0.00 0.00 0.00 —_ 0.00 Lot otal — — — — — — — — — — — 14 81 95 1.4 0.03 — 141 Annual |— — — — — — — — — — — — — — — — — — 1Condo/T |— — — — — — — — — — — 2.3 13 15 0.23 0.01 — 23 ownhou se Recreati |[— — — — — — — — — — — 0.04 0.20 0.24 <0.005 |<0.005 [— 0.37 onal Swimmi ng Pool Other [— — — — — — — — — — — 0.00 0.02 0.02 <0.005 |<0.005 |— 0.02 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 0.00 0.00 0.00 0.00 0.00 —_ 0.00 Lot Total — — — — — — — — — — — 23 13 16 0.24 0.01 — 23 4.5. Waste Emissions by Land Use 4.5.1. Unmitigated 44/ 67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 45 / 67 Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Condo/T ownhou se ———————————76 0.00 76 7.6 0.00 —266 Recreati onal Swimmi ng Pool ———————————6.4 0.00 6.4 0.64 0.00 —22 Other Non-Asphalt Surfaces ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Parking Lot ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Total ———————————82 0.00 82 8.2 0.00 —289 Daily, Winter (Max) —————————————————— Condo/T ownhou se ———————————76 0.00 76 7.6 0.00 —266 Recreati onal Swimmi ng Pool ———————————6.4 0.00 6.4 0.64 0.00 —22 Other Non-Asphalt Surfaces ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Parking Lot ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Total ———————————82 0.00 82 8.2 0.00 —289 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) PM10T [PM2.5E |PM2.5D |PM2.5T |BCO2 |NBCO2 |CO2T EEE Daily, — — — — — — — — Condo/T |— — — — — — — — — — — 76 0.00 76 7.6 0.00 — 266 ownhou se Recreati |[— — — — — — — — — — — 6.4 0.00 6.4 0.64 0.00 — 22 onal Swimmi ng Pool Other [— — — — — — — — — — — 0.00 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 0.00 0.00 0.00 0.00 0.00 —_ 0.00 Lot Total — — — — — — — — — — — 82 0.00 82 8.2 0.00 — 289 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Condo/T |— — — — — — — — — — — 76 0.00 76 7.6 0.00 — 266 ownhou se Recreati |[— — — — — — — — — — — 6.4 0.00 6.4 0.64 0.00 — 22 onal Swimmi ng Pool Other [— — — — — — — — — — — 0.00 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 0.00 0.00 0.00 0.00 0.00 —_ 0.00 Lot Total — — — — — — — — — — — 82 0.00 82 8.2 0.00 — 289 45/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 46 / 67 Annual —————————————————— Condo/T ownhou se ———————————13 0.00 13 1.3 0.00 —44 Recreati onal Swimmi ng Pool ———————————1.1 0.00 1.1 0.11 0.00 —3.7 Other Non-Asphalt Surfaces ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Parking Lot ———————————0.00 0.00 0.00 0.00 0.00 —0.00 Total ———————————14 0.00 14 1.4 0.00 —48 4.6. Refrigerant Emissions by Land Use 4.6.1. Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Condo/T ownhou se ————————————————2.8 2.8 Recreati onal Swimmi ng Pool ————————————————0.01 0.01 Total ————————————————2.8 2.8 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Annual |[— — — — — — — — — — — — _ — _ _ _ _ Condo/T |— — — — — — — — — — — 13 0.00 13 1.3 0.00 — 44 ownhou se Recreati |[— — — — — — — — — — — 1.1 0.00 1.1 0.11 0.00 — 37 onal Swimmi ng Pool Other [— — — — — — — — — — — 0.00 0.00 0.00 0.00 0.00 — 0.00 Non-Asphalt Surfaces Parking |— —_ —_ —_ —_ —_ —_ —_ —_ —_ —_ 0.00 0.00 0.00 0.00 0.00 —_ 0.00 Lot Total — — — — — — — — — — — 14 0.00 14 1.4 0.00 — 48 4.6. Refrigerant Emissions by Land Use 4.6.1. Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — Summer (Max) Condo/T |— — — — — — — — — — — — — — — — 2.8 2.8 ownhou se Recreati |— _ _ _ _ _ _ — — — — — — — — — 0.01 0.01 onal Swimmi ng Pool Total — — — — — — — — — — — — — — — — 2.8 2.8 46/ 67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 47 / 67 ——————————————————Daily, Winter (Max) Condo/T ownhou se ————————————————2.8 2.8 Recreati onal Swimmi ng Pool ————————————————0.01 0.01 Total ————————————————2.8 2.8 Annual —————————————————— Condo/T ownhou se ————————————————0.46 0.46 Recreati onal Swimmi ng Pool ————————————————< 0.005 < 0.005 Total ————————————————0.46 0.46 4.7. Offroad Emissions By Equipment Type 4.7.1. Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm ent Type TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Total —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Condo/T |— — — — — — — — — — — — — — — — 2.8 2.8 ownhou se Recreati |— _ _ _ _ _ _ — — — — — — — — — 0.01 0.01 onal Swimmi ng Pool [Total ~~ |— — — — — — — — — — — — — — — — 2.8 2.8 Annual |[— — — — — — — — — — — — _ — _ _ _ _ 1Condo/T |— — — — — — — — — — — — — — — — 0.46 0.46 ownhou se Recreati |[— — — — — — — — — — — — — — — — < 0.005 |<0.005 onal Swimmi ng Pool Total |— — — — — — — — — — — — — — — — 0.46 0.46 4.7. Offroad Emissions By Equipment Type 4.7.1. Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) HE PM10E (PM10D [PM10T [PM2.5E |PM2.5D |PM2.5T |BCO2 |NBCO2 47167 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 48 / 67 ——————————————————Daily, Winter (Max) Total —————————————————— Annual —————————————————— Total —————————————————— 4.8. Stationary Emissions By Equipment Type 4.8.1. Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm ent Type TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Total —————————————————— Daily, Winter (Max) —————————————————— Total —————————————————— Annual —————————————————— Total —————————————————— 4.9. User Defined Emissions By Equipment Type 4.9.1. Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipm ent Type TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Total |— — — — — — — — — — — — — — — — — — Annual |[— — — — — — — — — — — — _ — _ _ _ _ Total |— — — — — — — — — — — — — — — — — — 4.8. Stationary Emissions By Equipment Type 4.8.1. Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Equipm |TOG ROG NOx CO S02 PM10E [PM10D |PM10T (PM2.5E |PM2.5D |PM2.5T |BCO2 NBCO2 |CO2T CH4 N20 CO2e ent Type Daily, — Summer (Max) Total |— — — — — — — — — — — — — — — — — — Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Total |— — — — — — — — — — — — — — — — — — Annual |[— — — — — — — — — — — — _ — _ _ _ _ Total |— — — — — — — — — — — — — — — — — — 4.9. User Defined Emissions By Equipment Type 4.9.1. Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Equipm |TOG ROG NOx CO S02 PM10E [PM10D |PM10T (PM2.5E |PM2.5D |PM2.5T |BCO2 NBCO2 |CO2T CH4 N20 CO2e ent Type 48/ 67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 49 / 67 Daily, Summer (Max) —————————————————— Total —————————————————— Daily, Winter (Max) —————————————————— Total —————————————————— Annual —————————————————— Total —————————————————— 4.10. Soil Carbon Accumulation By Vegetation Type 4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Vegetati on TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Total —————————————————— Daily, Winter (Max) —————————————————— Total —————————————————— Annual —————————————————— Total —————————————————— 4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Total |— — — — — — — — — — — — — — — — — — Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Total |— — — — — — — — — — — — — — — — — — Annual |[— — — — — — — — — — — — _ — _ _ _ _ Total |— — — — — — — — — — — — — — — — — — 4.10. Soil Carbon Accumulation By Vegetation Type 4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Vegetati NOX PM10E [PM10D |PM10T [PM2.5E [PM2.5D |PM2.5T [BCO2 [NBCO2 |CO2T EEE on Daily, — — Summer (Max) Total |— — — — — — — — — — — — — — — — — — Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Total |— — — — — — — — — — — — — — — — — — Annual |[— — — — — — — — — — — — _ — _ _ _ _ Total |— — — — — — — — — — — — — — — — — — 4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Use 49/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 50 / 67 Daily, Summer (Max) —————————————————— Total —————————————————— Daily, Winter (Max) —————————————————— Total —————————————————— Annual —————————————————— Total —————————————————— 4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Species TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily, Summer (Max) —————————————————— Avoided —————————————————— Subtotal —————————————————— Sequest ered —————————————————— Subtotal —————————————————— Remove d —————————————————— Subtotal —————————————————— ——————————————————— Daily, Winter (Max) —————————————————— Avoided —————————————————— Subtotal —————————————————— 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Daily, — — — — — — — — — — — — — — — — — — Summer (Max) Total |— — — — — — — — — — — — — — — — — — Daily, — — — — — — — — — — — — — — — — — — Winter (Max) Total |— — — — — — — — — — — — — — — — — — Annual |[— — — — — — — — — — — — _ — _ _ _ _ Total |— — — — — — — — — — — — — — — — — — 4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Daily, — Summer (Max) Avoided |_ — — — — — — — — — — — _ — — _ _ _ Subtotal |[— — — — — — — — — — — — _ — — _ _ _ Sequest |— — — — —_ — — — — — — — — — — — — — ered Subtotal |[— — — — — — — — — — — — _ — — _ _ _ Remove |— — — — — — — — — — — — _ — _ _ _ _ d Subtotal |[— — — — — — — — — — — — _ — — _ _ _ | Daily, — — — — — — — — — — — — — — — — — — ‘Winter (Max) Avoided |— — — — — — — — — — — _ _ — _ _ _ _ Subtotal |[— — — — — — — — — — — — _ — — _ _ _ 50/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 51 / 67 ——————————————————Sequest ered Subtotal —————————————————— Remove d —————————————————— Subtotal —————————————————— ——————————————————— Annual —————————————————— Avoided —————————————————— Subtotal —————————————————— Sequest ered —————————————————— Subtotal —————————————————— Remove d —————————————————— Subtotal —————————————————— ——————————————————— 5. Activity Data 5.1. Construction Schedule Phase Name Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Roadway Paving Linear, Paving 8/2/2029 8/8/2029 5.0 5.0 — Demolition Demolition 10/1/2026 2/28/2027 5.0 107 — Site Preparation Site Preparation 4/1/2027 5/15/2027 5.0 32 — Grading Grading 5/16/2027 7/31/2027 5.0 55 — Building Construction Building Construction 12/16/2027 6/30/2029 5.0 402 — Paving Paving 12/1/2027 2/28/2028 5.0 64 — Architectural Coating Architectural Coating 12/16/2027 8/1/2029 5.0 425 — 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Sequest |— — ered Subtotal |[— — Remove |— — d Subtotal |[— — Annual |[— — Avoided |— — Subtotal |[— — Sequest |— — ered Subtotal |[— — Remove |— — d Subtotal |[— — 5. Activity Data 5.1. Construction Schedule Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Roadway Paving Linear, Paving 8/2/2029 8/8/2029 Demolition Demolition 10/1/2026 2/28/2027 5.0 107 — Site Preparation | Site Preparation 4/1/2027 5/15/2027 5.0 32 — Grading Grading | 5/16/2027 7/31/2027 5.0 55 — Building Construction Building Construction 12/16/2027 6/30/2029 5.0 402 — Paving Paving 12/1/2027 212812028 5.0 64 — Architectural Coating Architectural Coating 12/16/2027 8/1/2029 5.0 425 — 51/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 52 / 67 Infrastructure Improvements Trenching 8/1/2027 12/15/2027 5.0 98 — 5.2. Off-Road Equipment 5.2.1. Unmitigated Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor Roadway Paving Pavers Diesel Average 1.00 8.0 81 0.42 Roadway Paving Paving Equipment Diesel Average 1.00 8.0 89 0.36 Roadway Paving Rollers Diesel Average 2.0 8.0 36 0.38 Roadway Paving Signal Boards Electric Average 1.00 8.0 6.0 0.82 Roadway Paving Tractors/Loaders/Back hoes Diesel Average 3.0 8.0 84 0.37 Demolition Excavators Diesel Average 3.0 8.0 36 0.38 Demolition Tractors/Loaders/Back hoes Diesel Average 1.00 8.0 84 0.37 Site Preparation Tractors/Loaders/Back hoes Diesel Average 1.00 8.0 84 0.37 Grading Excavators Diesel Average 1.00 8.0 36 0.38 Grading Rubber Tired Dozers Diesel Average 1.00 8.0 367 0.40 Grading Tractors/Loaders/Back hoes Diesel Average 1.00 8.0 84 0.37 Grading Graders Diesel Average 1.00 8.0 148 0.41 Building Construction Cranes Diesel Average 1.00 7.0 367 0.29 Building Construction Forklifts Diesel Average 1.00 8.0 82 0.20 Building Construction Generator Sets Diesel Average 1.00 8.0 14 0.74 Building Construction Tractors/Loaders/Back hoes Diesel Average 2.0 7.0 84 0.37 Building Construction Welders Diesel Average 1.00 8.0 46 0.45 Paving Pavers Diesel Average 1.00 8.0 81 0.42 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Infrastructure Improvements Trenching 8/1/2027 12/15/2027 5.0 98 5.2. Off-Road Equipment 5.2.1. Unmitigated Roadway Paving Pavers Diesel Average 1.00 0.42 Roadway Paving Paving Equipment Diesel Average 1.00 8.0 89 0.36 Roadway Paving Rollers Diesel Average 20 8.0 36 0.38 , Roadway Paving Signal Boards Electric Average 1.00 8.0 6.0 0.82 Roadway Paving Tractors/Loaders/Back | Diesel Average 3.0 8.0 84 0.37 hoes Demolition Excavators Diesel Average 3.0 8.0 36 0.38 Demolition Tractors/Loaders/Back | Diesel Average 1.00 8.0 84 0.37 hoes Site Preparation Tractors/Loaders/Back | Diesel Average 1.00 8.0 84 0.37 hoes Grading Excavators Diesel Average 1.00 8.0 36 0.38 Grading Rubber Tired Dozers |Diesel Average 1.00 8.0 367 0.40 (Grading Tractors/Loaders/Back (Diesel Average 1.00 8.0 84 0.37 ‘hoes | Grading ! Graders Diesel Average 1.00 8.0 148 0.41 ! Building Construction Cranes Diesel Average 1.00 7.0 367 0.29 Building Construction Forklifts Diesel Average 1.00 8.0 82 0.20 \ Building Construction Generator Sets Diesel Average 1.00 8.0 14 0.74 Building Construction Tractors/Loaders/Back | Diesel Average 20 7.0 84 0.37 hoes Building Construction Welders Diesel Average 1.00 8.0 46 0.45 Paving Pavers Diesel Average 1.00 8.0 81 0.42 52/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 53 / 67 Paving Paving Equipment Diesel Average 1.00 8.0 89 0.36 Paving Rollers Diesel Average 1.00 8.0 36 0.38 Architectural Coating Air Compressors Diesel Average 2.0 6.0 37 0.48 Infrastructure Improvements Concrete/Industrial Saws Diesel Average 1.00 8.0 33 0.73 Infrastructure Improvements Trenchers Diesel Average 1.00 8.0 40 0.50 Infrastructure Improvements Tractors/Loaders/Back hoes Diesel Average 1.00 8.0 84 0.37 5.3. Construction Vehicles 5.3.1. Unmitigated Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Roadway Paving Worker 20 19 LDA,LDT1,LDT2 Roadway Paving Vendor 0.00 10 HHDT,MHDT Roadway Paving Hauling 0.00 20 HHDT Roadway Paving Onsite truck ——HHDT Demolition Worker 10.0 19 LDA,LDT1,LDT2 Demolition Vendor —10 HHDT,MHDT Demolition Hauling 72 43 HHDT Demolition Onsite truck ——HHDT Site Preparation Worker 2.5 19 LDA,LDT1,LDT2 Site Preparation Vendor —10 HHDT,MHDT Site Preparation Hauling 0.00 20 HHDT Site Preparation Onsite truck ——HHDT Grading Worker 10.0 19 LDA,LDT1,LDT2 Grading Vendor —10 HHDT,MHDT Grading Hauling 17 20 HHDT 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Paving Paving Equipment Diesel Average 1.00 8.0 89 0.36 Paving Rollers Diesel Average 1.00 8.0 36 0.38 Architectural Coating |,Air Compressors Diesel Average 20 6.0 37 0.48A Infrastructure Concrete/Industrial Diesel Average 1.00 8.0 33 0.73 Improvements Saws Infrastructure Trenchers Diesel Average 1.00 8.0 40 0.50 Improvements Infrastructure Tractors/Loaders/Back | Diesel Average 1.00 8.0 84 0.37 Improvements hoes 5.3. Construction Vehicles 5.3.1. Unmitigated 0 19Roadway Paving Worker 2 LDA,LDT1,LDT2 Roadway Paving Vendor 0.00 10 HHDT,MHDT Roadway Paving Hauling 0.00 20 HHDT Roadway Paving Onsite truck — — HHDT Demolition Worker 10.0 19 LDA,LDT1,LDT2 Demolition Vendor — 10 HHDT,MHDT Demolition Hauling 72 43 HHDT Demolition Onsite truck — — HHDT Site Preparation Worker 2.5 19 LDA,LDT1,LDT2 Site Preparation Vendor — 10 HHDT,MHDT Site Preparation Hauling 0.00 20 HHDT Site Preparation Onsite truck — — HHDT Grading Worker 10.0 19 LDA,LDT1,LDT2 Grading Vendor — 10 HHDT,MHDT Grading Hauling 17 20 HHDT 53/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 54 / 67 Grading Onsite truck ——HHDT Building Construction Worker 138 19 LDA,LDT1,LDT2 Building Construction Vendor 21 10 HHDT,MHDT Building Construction Hauling 0.00 20 HHDT Building Construction Onsite truck ——HHDT Paving Worker 7.5 19 LDA,LDT1,LDT2 Paving Vendor —10 HHDT,MHDT Paving Hauling 0.00 20 HHDT Paving Onsite truck ——HHDT Architectural Coating Worker 28 19 LDA,LDT1,LDT2 Architectural Coating Vendor —10 HHDT,MHDT Architectural Coating Hauling 0.00 20 HHDT Architectural Coating Onsite truck ——HHDT Infrastructure Improvements Worker 7.5 19 LDA,LDT1,LDT2 Infrastructure Improvements Vendor —10 HHDT,MHDT Infrastructure Improvements Hauling 0.00 20 HHDT Infrastructure Improvements Onsite truck ——HHDT 5.4. Vehicles 5.4.1. Construction Vehicle Control Strategies Control Strategies Applied PM10 Reduction PM2.5 Reduction Water unpaved roads twice daily 55%55% Limit vehicle speeds on unpaved roads to 25 mph 44%44% 5.5. Architectural Coatings Phase Name Residential Interior Area Coated (sq ft) Residential Exterior Area Coated (sq ft) Non-Residential Interior Area Coated (sq ft) Non-Residential Exterior Area Coated (sq ft) Parking Area Coated (sq ft) 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Grading Onsite truck — — HHDT Building Construction Worker 138 19 LDA,LDT1,LDT2 Building Construction Vendor 21 10 HHDT,MHDT Building Construction Hauling 0.00 20 HHDT Building Construction Onsite truck — — HHDT Paving Worker 7.5 19 LDA,LDT1,LDT2 Paving Vendor — 10 HHDT,MHDT Paving Hauling 0.00 20 HHDT Paving Onsite truck — — HHDT Architectural Coating Worker 28 19 LDA,LDT1,LDT2 Architectural Coating Vendor — 10 HHDT,MHDT Architectural Coating Hauling 0.00 20 HHDT Architectural Coating Onsite truck — — HHDT Infrastructure Improvements Worker 7.5 19 LDA,LDT1,LDT2 Infrastructure Improvements Vendor — 10 HHDT,MHDT Infrastructure Improvements Hauling 0.00 20 HHDT (nfrastructure Improvements Onsite truck — — HHDT 5.4. Vehicles 5.4.1. Construction Vehicle Control Strategies Control Strategies Applied PM10 Reduction PM2.5 Reduction Water unpaved roads twice daily Limit vehicle speeds on unpaved roads to 25 mph 55% (44% 55% | 44% 5.5. Architectural Coatings Phase Name Residential Interior Area Coated (sq ft) Residential Exterior Area Coated(sq ft) Non-Residential Interior Area [Non-Residential Exterior Area [Parking Area Coated (sq ft) Coated (sq ft) Coated (sq ft) 54/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 55 / 67 Architectural Coating 790,997 263,666 0.00 0.00 11,361 5.6. Dust Mitigation 5.6.1. Construction Earthmoving Activities Phase Name Material Imported (cy)Material Exported (cy)Acres Graded (acres)Material Demolished (Ton of Debris) Acres Paved (acres) Demolition 0.00 0.00 0.00 30,706 0.00 Site Preparation ——0.00 0.00 0.00 Grading 7,500 —55 0.00 0.00 Paving 0.00 0.00 0.00 0.00 4.8 5.6.2. Construction Earthmoving Control Strategies Control Strategies Applied Frequency (per day)PM10 Reduction PM2.5 Reduction Water Exposed Area 3 74%74% Water Demolished Area 2 36%36% 5.7. Construction Paving Phase Name Land Use Area Paved (acres)% Asphalt Paving Condo/Townhouse —0% Paving Recreational Swimming Pool 0.00 0% Paving Other Non-Asphalt Surfaces 1.3 0% Paving Parking Lot 3.0 100% Paving Road Widening 0.50 100% 5.8. Construction Electricity Consumption and Emissions Factors kWh per Year and Emission Factor (lb/MWh) 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Architectural Coating 790,997 263,666 0.00 0.00 11,361 5.6. Dust Mitigation 5.6.1. Construction Earthmoving Activities Demolition 0.00 30,706 0.00 Site Preparation — — 0.00 0.00 0.00 Grading 7,500 — 55 0.00 0.00 Paving 0.00 0.00 0.00 0.00 4.8 5.6.2. Construction Earthmoving Control Strategies [Control Strategies Applied |Control Strategies Applied Frequency (perday) |per day) [PM1OReducion |Reduction PM2.5 ReductionPv25Reducton | Water Exposed Area 4% 74% Water Demolished Area 2 | 36% | 36% 5.7. Construction Paving Paving CondofTownhouse - Paving Recreational Swimming Pool 0.00 0% Paving Other Non-Asphalt Surfaces 1.3 0% Paving Parking Lot 3.0 100% Paving Road Widening 0.50 100% 5.8. Construction Electricity Consumption and Emissions Factors kWh per Year and Emission Factor (Ib/MWh) 55/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 56 / 67 Year kWh per Year CO2 CH4 N2O 2026 0.00 532 0.03 < 0.005 2027 0.00 532 0.03 < 0.005 2028 0.00 532 0.03 < 0.005 2029 29 532 0.03 < 0.005 5.9. Operational Mobile Sources 5.9.1. Unmitigated Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Year VMT/Weekday VMT/Saturday VMT/Sunday VMT/Year Condo/Townhouse 1,375 1,375 1,375 501,875 11,832 11,832 11,832 4,318,726 Recreational Swimming Pool 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Other Non-Asphalt Surfaces 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.10. Operational Area Sources 5.10.1. Hearths Land Use Hearth Type Unmitigated (number)Mitigated (number) Condo/Townhouse Wood Fireplaces 0 0 Condo/Townhouse Gas Fireplaces 0 0 Condo/Townhouse Propane Fireplaces 0 0 Condo/Townhouse Electric Fireplaces 129 129 Condo/Townhouse No Fireplaces 62 62 Condo/Townhouse Conventional Wood Stoves 0 0 Condo/Townhouse Catalytic Wood Stoves 0 0 Condo/Townhouse Non-Catalytic Wood Stoves 0 0 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 2026 0.00 0.03 < 0.005 2027 0.00 532 0.03 < 0.005 2028 0.00 532 0.03 < 0.005 2029 29 532 0.03 < 0.005 5.9. Operational Mobile Sources 5.9.1. Unmitigated Condo/Townhouse 1,375 1,375 1,375 501,875 11,832 11,832 11,832 4,318,726 Recreational 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Swimming Pool Other Non-Asphalt (0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Surfaces I Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.10. Operational Area Sources 5.10.1. Hearths lenguse HearthHearth Type Unmitigated (number) |(number) Mitigated (number)Miigated (number) | Condo/Townhouse Wood Fireplaces Condo/Townhouse Gas Fireplaces 0 0 Condo/Townhouse Propane Fireplaces 0 0 Condo/Townhouse Electric Fireplaces 129 129 Condo/Townhouse No Fireplaces 62 62 Condo/Townhouse Conventional Wood Stoves 0 0 Condo/Townhouse Catalytic Wood Stoves 0 0 Condo/Townhouse Non-Catalytic Wood Stoves 0 0 56/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 57 / 67 Condo/Townhouse Pellet Wood Stoves 0 0 Recreational Swimming Pool Wood Fireplaces 0 0 Recreational Swimming Pool Gas Fireplaces 0 0 Recreational Swimming Pool Propane Fireplaces 0 0 Recreational Swimming Pool Electric Fireplaces 0 0 Recreational Swimming Pool No Fireplaces 0 0 Recreational Swimming Pool Conventional Wood Stoves 0 0 Recreational Swimming Pool Catalytic Wood Stoves 0 0 Recreational Swimming Pool Non-Catalytic Wood Stoves 0 0 Recreational Swimming Pool Pellet Wood Stoves 0 0 Other Non-Asphalt Surfaces Wood Fireplaces 0 0 Other Non-Asphalt Surfaces Gas Fireplaces 0 0 Other Non-Asphalt Surfaces Propane Fireplaces 0 0 Other Non-Asphalt Surfaces Electric Fireplaces 0 0 Other Non-Asphalt Surfaces No Fireplaces 0 0 Other Non-Asphalt Surfaces Conventional Wood Stoves 0 0 Other Non-Asphalt Surfaces Catalytic Wood Stoves 0 0 Other Non-Asphalt Surfaces Non-Catalytic Wood Stoves 0 0 Other Non-Asphalt Surfaces Pellet Wood Stoves 0 0 Parking Lot Wood Fireplaces 0 0 Parking Lot Gas Fireplaces 0 0 Parking Lot Propane Fireplaces 0 0 Parking Lot Electric Fireplaces 0 0 Parking Lot No Fireplaces 0 0 Parking Lot Conventional Wood Stoves 0 0 Parking Lot Catalytic Wood Stoves 0 0 Parking Lot Non-Catalytic Wood Stoves 0 0 Parking Lot Pellet Wood Stoves 0 0 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Condo/Townhouse Pellet Wood Stoves Recreational Swimming Pool Wood Fireplaces Recreational Swimming Pool Gas Fireplaces Recreational Swimming Pool Propane Fireplaces Recreational Swimming Pool Electric Fireplaces Recreational Swimming Pool No Fireplaces Recreational Swimming Pool Conventional Wood Stoves Recreational Swimming Pool Catalytic Wood Stoves Recreational Swimming Pool Non-Catalytic Wood Stoves Recreational Swimming Pool Pellet Wood Stoves Other Non-Asphalt Surfaces Wood Fireplaces Other Non-Asphalt Surfaces Gas Fireplaces Other Non-Asphalt Surfaces Propane Fireplaces Other Non-Asphalt Surfaces Electric Fireplaces Other Non-Asphalt Surfaces No Fireplaces Other Non-Asphalt Surfaces Conventional Wood Stoves Other Non-Asphalt Surfaces Catalytic Wood Stoves Other Non-Asphalt Surfaces Non-Catalytic Wood Stoves Other Non-Asphalt Surfaces Pellet Wood Stoves Parking Lot Wood Fireplaces Parking Lot Gas Fireplaces Parking Lot Propane Fireplaces Parking Lot Electric Fireplaces Parking Lot No Fireplaces Parking Lot Conventional Wood Stoves Parking Lot Catalytic Wood Stoves Parking Lot Non-Catalytic Wood Stoves Parking Lot Pellet Wood Stoves oO | j ] l o | o | J ] o | ] o | ] o | ] o | ] o ] o | ] O o | O o O | ] O o | ] l O o O | ] 0 o ] | ] O o O | ] O o O | ] O o O ] | ] O | O | ] O ] O | ] O ] | ] O | ] O | ] O ] | ] O | O ] | O oO | l o | ] o | j ] o | j ] o ] J ] o | J ] o | ] o ] J ] o | ] o | ] o | ] o | ] l o | j ] o | ] o | ] o | ] o | l ] o | ] o | ] o ] o | j ] o | ] o | ] o | ] o ] | ] o | o ] | oO 57167 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 58 / 67 5.10.2. Architectural Coatings —Residential Interior Area Coated (sq ft) Residential Exterior Area Coated (sq ft) Non-Residential Interior Area Coated (sq ft) Non-Residential Exterior Area Coated (sq ft) Parking Area Coated (sq ft) undefined 790,997 263,666 0.00 0.00 11,361 5.10.3. Landscape Equipment Season Unit Value Snow Days day/yr 0.00 Summer Days day/yr 250 5.11. Operational Energy Consumption 5.11.1. Unmitigated Electricity (kWh/yr) and CO2 and CH4 and N2O and Natural Gas (kBTU/yr) Land Use Electricity (kWh/yr)CO2 CH4 N2O Natural Gas (kBTU/yr) Condo/Townhouse 879,046 532 0.0330 0.0040 0.00 Recreational Swimming Pool 0.00 532 0.0330 0.0040 1,787,878 Other Non-Asphalt Surfaces 0.00 532 0.0330 0.0040 0.00 Parking Lot 114,625 532 0.0330 0.0040 0.00 5.12. Operational Water and Wastewater Consumption 5.12.1. Unmitigated Land Use Indoor Water (gal/year)Outdoor Water (gal/year) Condo/Townhouse 7,119,296 1,206,429 Recreational Swimming Pool 123,787 0.00 Other Non-Asphalt Surfaces 0.00 17,573 Parking Lot 0.00 0.00 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 5.10.2. Architectural Coatings Residential Interior Area Residential Exterior Area Non-Residential Interior Area [Non-Residential Exterior Area [Parking Area Coated (sq ft) Coated (sq ft) Coated (sq ft) Coated (sq ft) Coated (sq ft) undefined 790,997 263,666 0.00 0.00 11,361 5.10.3. Landscape Equipment ES TS Snow Days day/yr 0.00 Summer Days day/yr | 250 5.11. Operational Energy Consumption 5.11.1. Unmitigated Electricity (kWh/yr) and CO2 and CH4 and N20 and Natural Gas Fe Condo/Townhouse 879,046 0.0330 0.0040 0.00 Recreational Swimming Pool 0.00 532 0.0330 0.0040 1,787,878 Other Non-Asphalt Surfaces | 0.00 532 0.0330 0.0040 0.00= |Parking Lot 114,625 532 0.0330 0.0040 0.00arking Lo 114, 5.12. Operational Water and Wastewater Consumption 5.12.1. Unmitigated Condo/Townhouse 7,119,296 1,206,429 Recreational Swimming Pool 123,787 0.00 Other Non-Asphalt Surfaces 0.00 17,573 Parking Lot 0.00 0.00 58/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 59 / 67 5.13. Operational Waste Generation 5.13.1. Unmitigated Land Use Waste (ton/year)Cogeneration (kWh/year) Condo/Townhouse 141 0.00 Recreational Swimming Pool 12 0.00 Other Non-Asphalt Surfaces 0.00 0.00 Parking Lot 0.00 0.00 5.14. Operational Refrigeration and Air Conditioning Equipment 5.14.1. Unmitigated Land Use Equipment Type Refrigerant GWP Quantity (kg)Operations Leak Rate Service Leak Rate Times Serviced Condo/Townhouse Average room A/C & Other residential A/C and heat pumps R-410A 2,088 < 0.005 2.5 2.5 10.0 Condo/Townhouse Household refrigerators and/or freezers R-134a 1,430 0.12 0.60 0.00 1.00 Recreational Swimming Pool Other commercial A/C and heat pumps R-410A 2,088 < 0.005 4.0 4.0 18 Recreational Swimming Pool Stand-alone retail refrigerators and freezers R-134a 1,430 0.04 1.00 0.00 1.00 5.15. Operational Off-Road Equipment 5.15.1. Unmitigated 5.16. Stationary Sources 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 5.13. Operational Waste Generation 5.13.1. Unmitigated Condofownhouseownhouse aa e00000 Recreational Swimming Pool 12 0.00 Other Non-Asphalt Surfaces 0.00 0.00I - Parking Lot 0.00 0.00 5.14. Operational Refrigeration and Air Conditioning Equipment 5.14.1. Unmitigated Condo/Townhouse Average room A/C & R-410A 2,088 < 0.005 10.0 Other residential A/C and heat pumps Condo/Townhouse Household R-134a 1,430 0.12 0.60 0.00 1.00 refrigerators and/or freezers | Recreational Other commercial A/C [R-410A 2,088 < 0.005 4.0 4.0 18 Swimming Pool and heat pumps Recreational Stand-alone retail R-134a 1,430 0.04 1.00 0.00 1.00 Swimming Pool | refrigerators and freezers 5.15. Operational Off-Road Equipment 5.15.1. Unmitigated 5.16. Stationary Sources 59/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 60 / 67 5.16.1. Emergency Generators and Fire Pumps 5.16.2. Process Boilers 5.17. User Defined 5.18. Vegetation 5.18.1. Land Use Change 5.18.1.1. Unmitigated Vegetation Land Use Type Vegetation Soil Type Initial Acres Final Acres 5.18.1. Biomass Cover Type 5.18.1.1. Unmitigated Biomass Cover Type Initial Acres Final Acres 5.18.2. Sequestration 5.18.2.1. Unmitigated Tree Type Number Electricity Saved (kWh/year)Natural Gas Saved (btu/year) 6. Climate Risk Detailed Report 6.1. Climate Risk Summary Cal-Adapt midcentury 2040–2059 average projections for four hazards are reported below for your project location. These are under Representation Concentration Pathway (RCP) 8.5 which assumes GHG emissions will continue to rise strongly through 2050 and then plateau around 2100. Climate Hazard Result for Project Location Unit Temperature and Extreme Heat 16 annual days of extreme heat 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 5.16.1. Emergency Generators and Fire Pumps 5.16.2. Process Boilers 5.17. User Defined 5.18. Vegetation 5.18.1. Land Use Change 5.18.1.1. Unmitigated | Vegetation Land Use Type Vegetation Soil Type Initial Acres Finalaces |] 5.18.1. Biomass Cover Type 5.18.1.1. Unmitigated 5.18.2. Sequestration 5.18.2.1. Unmitigated 6. Climate Risk Detailed Report 6.1. Climate Risk Summary Cal-Adapt midcentury 2040-2059 average projections for four hazards are reported below for your project location. These are under Representation Concentration Pathway (RCP) 8.5 which assumes GHG emissions will continue to rise strongly through 2050 and then plateau around 2100. Temperature and Extreme Heat 16 annual days of extreme heat 60/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 61 / 67 Extreme Precipitation 5.5 annual days with precipitation above 20 mm Sea Level Rise —meters of inundation depth Wildfire 0.00 annual hectares burned Temperature and Extreme Heat data are for grid cell in which your project are located. The projection is based on the 98th historical percentile of daily maximum/minimum temperatures from observed historical data (32 climate model ensemble from Cal-Adapt, 2040–2059 average under RCP 8.5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi. Extreme Precipitation data are for the grid cell in which your project are located. The threshold of 20 mm is equivalent to about ¾ an inch of rain, which would be light to moderate rainfall if received over a full day or heavy rain if received over a period of 2 to 4 hours. Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi. Sea Level Rise data are for the grid cell in which your project are located. The projections are from Radke et al. (2017), as reported in Cal-Adapt (Radke et al., 2017, CEC-500-2017-008), and consider inundation location and depth for the San Francisco Bay, the Sacramento-San Joaquin River Delta and California coast resulting different increments of sea level rise coupled with extreme storm events. Users may select from four scenarios to view the range in potential inundation depth for the grid cell. The four scenarios are: No rise, 0.5 meter, 1.0 meter, 1.41 meters Wildfire data are for the grid cell in which your project are located. The projections are from UC Davis, as reported in Cal-Adapt (2040–2059 average under RCP 8.5), and consider historical data of climate, vegetation, population density, and large (> 400 ha) fire history. Users may select from four model simulations to view the range in potential wildfire probabilities for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CM5), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIROC5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi. 6.2. Initial Climate Risk Scores Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score Temperature and Extreme Heat 2 0 0 N/A Extreme Precipitation N/A N/A N/A N/A Sea Level Rise 1 0 0 N/A Wildfire 1 0 0 N/A Flooding N/A N/A N/A N/A Drought N/A N/A N/A N/A Snowpack Reduction N/A N/A N/A N/A Air Quality Degradation 0 0 0 N/A The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure. The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt. The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures. 6.3. Adjusted Climate Risk Scores Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Extreme Precipitation 5.5 annual days with precipitation above 20 mm Sea Level Rise — meters of inundation depth - Wildfire 0.00 annual hectares burned Temperature and Extreme Heat data are for grid cell in which your project are located. The projection is based on the 98th historical percentile of daily maximum/minimum temperatures from observed historical data (32 climate model ensemble from Cal-Adapt, 2040-2059 average under RCP 8.5). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi. Extreme Precipitation data are for the grid cell in which your project are located. The threshold of 20 mm is equivalent to about % an inch of rain, which would be light to moderate rainfall if received over a full day or heavy rain if received over a period of 2 to 4 hours. Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi. Sea Level Rise data are for the grid cell in which your project are located. The projections are from Radke et al. (2017), as reported in Cal-Adapt (Radke et al., 2017, CEC-500-2017-008), and consider inundation location and depth for the San Francisco Bay, the Sacramento-San Joaquin River Delta and California coast resulting different increments of sea level rise coupled with extreme storm events. Users may select from four scenarios to view the range in potential inundation depth for the grid cell. The four scenarios are: No rise, 0.5 meter, 1.0 meter, 1.41 meters Wildfire data are for the grid cell in which your project are located. The projections are from UC Davis, as reported in Cal-Adapt (2040-2059 average under RCP 8.5), and consider historical data of climate, vegetation, population density, and large (> 400 ha) fire history. Users may select from four model simulations to view the range in potential wildfire probabilities for the grid cell. The four simulations make different assumptions about expected rainfall and temperature are: Warmer/drier (HadGEM2-ES), Cooler/wetter (CNRM-CMS), Average conditions (CanESM2), Range of different rainfall and temperature possibilities (MIROCS). Each grid cell is 6 kilometers (km) by 6 km, or 3.7 miles (mi) by 3.7 mi. 6.2. Initial Climate Risk Scores Climate Hazard Sensitivity Score Adaptive Capacity Score Vulnerability Score Temperature and Extreme Heat Extreme Precipitation N/A N/A N/A N/A Sea Level Rise 1 0 0 N/A Wildfire 1 0 0 N/A Flooding N/A N/A N/A N/A Drought N/A N/A N/A N/A | Showpack Reduction N/A N/A N/A N/A Air Quality Degradation 0 0 0 N/A The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure. The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt. The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures. 6.3. Adjusted Climate Risk Scores Climate Hazard Sensitivity Score Adaptive Capacity Score Vulnerability Score 61/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 62 / 67 Temperature and Extreme Heat 2 1 1 3 Extreme Precipitation N/A N/A N/A N/A Sea Level Rise 1 1 1 2 Wildfire 1 1 1 2 Flooding N/A N/A N/A N/A Drought N/A N/A N/A N/A Snowpack Reduction N/A N/A N/A N/A Air Quality Degradation 1 1 1 2 The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure. The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt. The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures. 6.4. Climate Risk Reduction Measures 7. Health and Equity Details 7.1. CalEnviroScreen 4.0 Scores The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. Indicator Result for Project Census Tract Exposure Indicators — AQ-Ozone 71 AQ-PM 77 AQ-DPM 69 Drinking Water 94 Lead Risk Housing 58 Pesticides 49 Toxic Releases 81 Traffic 75 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Temperature and Extreme Heat 2 1 1 3 Extreme Precipitation N/A N/A N/A N/A Sea Level Rise 1 1 1 2 Wildfire 1 1 1 2 Flooding N/A N/A N/A N/A Drought N/A N/A N/A N/A | Showpack Reduction N/A N/A N/A N/A Air Quality Degradation 1 1 1 2 The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure. The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt. The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures. 6.4. Climate Risk Reduction Measures 7. Health and Equity Details 7.1. CalEnviroScreen 4.0 Scores The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. Exposure Indicators AQ-Ozone 71 AQ-PM 77 AQ-DPM 69 Drinking Water 94 Lead Risk Housing 58 Pesticides 49 Toxic Releases 81 Traffic 75 62/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 63 / 67 Effect Indicators — CleanUp Sites 76 Groundwater 86 Haz Waste Facilities/Generators 80 Impaired Water Bodies 83 Solid Waste 40 Sensitive Population — Asthma 43 Cardio-vascular 42 Low Birth Weights 57 Socioeconomic Factor Indicators — Education 84 Housing 42 Linguistic 89 Poverty 78 Unemployment 14 7.2. Healthy Places Index Scores The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state. Indicator Result for Project Census Tract Economic — Above Poverty 36.41729757 Employed 67.86860003 Median HI 37.1872193 Education — Bachelor's or higher 45.73335044 High school enrollment 14.96214552 Preschool enrollment 20.3131015 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Effect Indicators — CleanUp Sites 76 Groundwater 86 Haz Waste Facilities/Generators 80 Impaired Water Bodies 83 Solid Waste 40 Sensitive Population — Asthma 43 Cardio-vascular 42 Low Birth Weights 57 Socioeconomic Factor Indicators — Education 84 Housing 42 Linguistic 89 Poverty 78 Unemployment 14 7.2. Healthy Places Index Scores The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state. Economic Above Poverty 36.41729757 Employed 67.86860003 Median HI 37.1872193 Education — Bachelor's or higher 45.73335044 High school enrollment 14.96214552 Preschool enrollment 20.3131015 63/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 64 / 67 Transportation — Auto Access 50.17323239 Active commuting 50.21172847 Social — 2-parent households 35.39073528 Voting 5.440780187 Neighborhood — Alcohol availability 37.86731682 Park access 19.68433209 Retail density 79.04529706 Supermarket access 47.83780316 Tree canopy 51.71307584 Housing — Homeownership 56.88438342 Housing habitability 29.66765046 Low-inc homeowner severe housing cost burden 9.149236494 Low-inc renter severe housing cost burden 9.726677788 Uncrowded housing 43.11561658 Health Outcomes — Insured adults 15.14179392 Arthritis 0.0 Asthma ER Admissions 62.2 High Blood Pressure 0.0 Cancer (excluding skin)0.0 Asthma 0.0 Coronary Heart Disease 0.0 Chronic Obstructive Pulmonary Disease 0.0 Diagnosed Diabetes 0.0 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Transportation — Auto Access 50.17323239 Active commuting 50.21172847 Social — 2-parent households 35.39073528 Voting 5.440780187 Neighborhood — Alcohol availability 37.86731682 Park access 19.68433209 Retail density 79.04529706 Supermarket access 47.83780316 Tree canopy 51.71307584 Housing Homeownership 56.88438342 Housing habitability Low-inc homeowner severe housing cost burden 29.66765046 9.149236494 Low-inc renter severe housing cost burden 9.726677788 Uncrowded housing 43.11561658 Health Outcomes Insured adults 15.14179392 Arthritis 0.0 Asthma ER Admissions 62.2 High Blood Pressure 0.0 Cancer (excluding skin)0.0 Asthma 0.0 Coronary Heart Disease 0.0 Chronic Obstructive Pulmonary Disease 0.0 Diagnosed Diabetes 0.0 64/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 65 / 67 Life Expectancy at Birth 87.0 Cognitively Disabled 23.2 Physically Disabled 69.8 Heart Attack ER Admissions 68.9 Mental Health Not Good 0.0 Chronic Kidney Disease 0.0 Obesity 0.0 Pedestrian Injuries 41.4 Physical Health Not Good 0.0 Stroke 0.0 Health Risk Behaviors — Binge Drinking 0.0 Current Smoker 0.0 No Leisure Time for Physical Activity 0.0 Climate Change Exposures — Wildfire Risk 0.0 SLR Inundation Area 0.0 Children 62.5 Elderly 27.3 English Speaking 6.2 Foreign-born 91.2 Outdoor Workers 41.7 Climate Change Adaptive Capacity — Impervious Surface Cover 37.1 Traffic Density 71.6 Traffic Access 56.4 Other Indices — Hardship 52.8 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Life Expectancy at Birth 87.0 Cognitively Disabled 23.2 Physically Disabled 69.8 Heart Attack ER Admissions 68.9 Mental Health Not Good 0.0 Chronic Kidney Disease 0.0 Obesity 0.0 Pedestrian Injuries 414 Physical Health Not Good 0.0 Stroke 0.0 Health Risk Behaviors — Binge Drinking 0.0 Current Smoker 0.0 No Leisure Time for Physical Activity 0.0 Climate Change Exposures — Wildfire Risk 0.0 SLR Inundation Area 0.0 Children 62.5 Elderly 27.3 English Speaking 6.2 Foreign-born 91.2 Outdoor Workers 41.7 Climate Change Adaptive Capacity — Impervious Surface Cover 371 Traffic Density 71.6 Traffic Access 56.4 Other Indices — Hardship 52.8 65/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 66 / 67 Other Decision Support — 2016 Voting 19.9 7.3. Overall Health & Equity Scores Metric Result for Project Census Tract CalEnviroScreen 4.0 Score for Project Location (a)88 Healthy Places Index Score for Project Location (b)27 Project Located in a Designated Disadvantaged Community (Senate Bill 535)Yes Project Located in a Low-Income Community (Assembly Bill 1550)Yes Project Located in a Community Air Protection Program Community (Assembly Bill 617)No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state. 7.4. Health & Equity Measures No Health & Equity Measures selected. 7.5. Evaluation Scorecard Health & Equity Evaluation Scorecard not completed. 7.6. Health & Equity Custom Measures No Health & Equity Custom Measures created. 8. User Changes to Default Data 8.1. Justifications Screen Justification Land Use acreage is based on the footprint and not the gross square feet other non-asphalt surfaces account for on-site improvements, 3,000 square feet of right-of-way sidewalk improvements, and 1,253 square feet of landscaping improvements along the walnut grove avenue frontage road widening accounts for walnut grove avenue roadway improvements 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Other Decision Support 2016 Voting 19.9 7.3. Overall Health & Equity Scores CalEnviroScreen 4.0 Score for Project Location (a) 88 Healthy Places Index Score for Project Location (b) 27 Project Located in a Designated Disadvantaged Community (Senate Bill 535) Yes |Project Located in a Low-Income Community (Assembly Bill 1550) Yes | Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state. b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state. 7.4. Health & Equity Measures No Health & Equity Measures selected. 7.5. Evaluation Scorecard Health & Equity Evaluation Scorecard not completed. 7.6. Health & Equity Custom Measures No Health & Equity Custom Measures created. 8. User Changes to Default Data 8.1. Justifications Land Use acreage is based on the footprint and not the gross square feet other non-asphalt surfaces account for on-site improvements, 3,000 square feet of right-of-way sidewalk improvements, and 1,253 square feet of landscaping improvements along the walnut grove avenue frontage road widening accounts for walnut grove avenue roadway improvements 66/67 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 67 / 67 Construction: Construction Phases per client questionnaire Construction: Off-Road Equipment trenching equipment assumed for infrastructure improvements revised equipment per contractor input Construction: Trips and VMT demolition haul mileage assumes worst-case disposal site distance Operations: Vehicle Data per Traffic Study prepared by Kimley-Horn and Associates, Inc. Operations: Hearths SCAQMD Rule 445 (Wood Burning) prohibits permanently installed wood-burning devices in new developments the building would be all-electric and would not include natural gas fireplaces Operations: Energy Use the townhouses would be all electric the pool would be heated with natural gas 1515 Walnut Grove Avenue Detailed Report, 12/17/2025 Construction: Construction Phases per client questionnaire trenching equipment assumed for infrastructure improvementsConstruction: Off-Road Equipment revised equipment per contractor input [ Construction: Trips and VMT | demolition haul mileage assumes worst-case disposal site distance ’ Operations: Vehicle Data y per Traffic Study prepared by Kimley-Horn and Associates, Inc. ) SCAQMD Rule 445 (Wood Burning) prohibits permanently installed wood-burning devices in new developments - the building would be all-electric and would not include natural gas fireplaces Operations: Hearths the townhouses would be all electricOperations: Energy Use the pool would be heated with natural gas 67/67