PC - 3A - Exhibit D
NOISE IMPACT ANALYSIS
SUN DAY CARWASH AT 9540 VALLEY BOULEVARD
PROJECT
CITY OF ROSEMEAD
Lead Agency:
City of Rosemead
8838 East Valley Boulevard
Rosemead, CA 91770
Prepared by:
Vista Environmental
1021 Didrickson Way
Laguna Beach, California 92651
949 510 5355
Greg Tonkovich, INCE
Project No. 25002
March 22, 2026
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
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TABLE OF CONTENTS
1.0 Introduction ............................................................................................................................ 1
1.1 Purpose of Analysis and Study Objectives ................................................................................. 1
1.2 Site Location and Study Area ..................................................................................................... 1
1.3 Proposed Project Description .................................................................................................... 1
1.4 Standard Noise Regulatory Conditions ...................................................................................... 2
1.5 Summary of Analysis Results ..................................................................................................... 2
1.6 Mitigation Measures for the Proposed Project ......................................................................... 2
2.0 Noise Fundamentals ................................................................................................................ 5
2.1 Noise Descriptors ....................................................................................................................... 5
2.2 Tone Noise ................................................................................................................................. 5
2.3 Noise Propagation ...................................................................................................................... 5
2.4 Ground Absorption .................................................................................................................... 6
3.0 Ground-Borne Vibration Fundamentals ................................................................................... 7
3.1 Vibration Descriptors ................................................................................................................. 7
3.2 Vibration Perception .................................................................................................................. 7
3.3 Vibration Propagation ................................................................................................................ 7
4.0 Regulatory Setting ................................................................................................................... 8
4.1 Federal Regulations ................................................................................................................... 8
4.2 State Regulations ....................................................................................................................... 9
4.3 Local Regulations ..................................................................................................................... 11
5.0 Existing Noise Conditions ....................................................................................................... 13
5.1 Noise Measurements taken in Project Vicinity ........................................................................ 13
6.0 Modeling Parameters and Assumptions ................................................................................. 17
6.1 Construction Noise ................................................................................................................... 17
6.2 Operational Noise .................................................................................................................... 18
6.3 Vibration .................................................................................................................................. 22
7.0 Impact Analysis ..................................................................................................................... 23
7.1 CEQA Thresholds of Significance.............................................................................................. 23
7.2 Generation of Noise Levels in Excess of Standards ................................................................. 23
7.3 Generation of Excessive Groundborne Vibration .................................................................... 27
7.4 Aircraft Noise ........................................................................................................................... 28
8.0 References ............................................................................................................................. 29
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
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TABLE OF CONTENTS CONTINUED
APPENDICES
Appendix A – Field Noise Measurements Photo Index
Appendix B – Field Noise Measurements Printouts
Appendix C – RCNM Model Construction Noise Calculations
Appendix D – FHWA Model Traffic Noise Calculations Printouts
Appendix E – Operational Reference Noise Measurement Printouts
Appendix F – Operational Noise Barrier Calculations Printouts
LIST OF FIGURES
Figure 1 – Project Location Map ................................................................................................................... 3
Figure 2 – Proposed Site Plan ....................................................................................................................... 4
Figure 3 – Field Noise Monitoring Locations .............................................................................................. 15
Figure 4 – Field Noise Measurements Graph .............................................................................................. 16
LIST OF TABLES
Table A – FTA Project Effects on Cumulative Noise Exposure ...................................................................... 8
Table B – FTA Construction Noise Criteria .................................................................................................... 9
Table C – City of Rosemead Exterior Noise Standards ................................................................................ 12
Table D – Existing (Ambient) Noise Level Measurements .......................................................................... 14
Table E – Construction Equipment Noise Emissions and Usage Factors .................................................... 17
Table F – FHWA Model Roadway Parameters ............................................................................................ 19
Table G – Average Daily Traffic Volumes .................................................................................................... 19
Table H – Roadway Vehicle Mixes .............................................................................................................. 20
Table I – Reference Noise Level Measurements of Torrance Fast5Xpress Carwash .................................. 21
Table J – Vibration Source Levels for Construction Equipment .................................................................. 22
Table K – Construction Noise Levels at the Nearby Receptors ................................................................... 24
Table L – Existing Year Project Traffic Noise Contributions ........................................................................ 25
Table M – Opening Year 2027 Project Traffic Noise Contributions ............................................................ 26
Table N – Operational Onsite Noise Levels at the Nearby Sensitive Receptors ......................................... 27
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City of Rosemead
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ACRONYMS AND ABBREVIATIONS
ANSI American National Standards Institute
Caltrans California Department of Transportation
CEQA California Environmental Quality Act
City City of Rosemead
CNEL Community Noise Equivalent Level
dB Decibel
dBA A-weighted decibels
DOT Department of Transportation
FHWA Federal Highway Administration
FTA Federal Transit Administration
EPA Environmental Protection Agency
FTES Full Time Equivalent Students
HVAC Heating Ventilation & Air Conditioning System
Hz Hertz
Ldn Day-night average noise level
Leq Equivalent sound level
Lmax Maximum noise level
ONAC Federal Office of Noise Abatement and Control
OSHA Occupational Safety and Health Administration
PPV Peak particle velocity
RMS Root mean square
SEL Single Event Level or Sound Exposure Level
STC Sound Transmission Class
VdB Vibration velocity level in decibels
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
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1.0 INTRODUCTION
1.1 Purpose of Analysis and Study Objectives
This Noise Impact Analysis has been prepared to determine the noise impacts associated with the
proposed Sun Day Carwash at 9540 Valley Boulevard project (proposed project). The following is provided
in this report:
A description of the study area and the proposed project;
Information regarding the fundamentals of noise;
Information regarding the fundamentals of vibration;
A description of the local noise guidelines and standards;
An evaluation of the current noise environment;
An analysis of the potential short-term construction-related noise impacts from the proposed
project; and,
An analysis of long-term operations-related noise impacts from the proposed project.
1.2 Site Location and Study Area
The project site is located in the northern portion of the City of Rosemead (City) at 9540 Valley Boulevard.
The approximately 1.08 acre project site is currently developed with an existing carwash, a house that
was used as a business and a restaurant that are all currently closed. The project site is bounded by Valley
Boulevard and industrial uses to the north, commercial uses to the east and west, and single-family homes
to the south. There is existing 6-foot high concrete masonry unit (CMU) walls on the majority of the east,
south and west property lines. The project study area is shown in Figure 1.
Sensitive Receptors in Project Vicinity
The nearest sensitive receptors are the single-family homes to the south that are as near as 10 feet south
of the project site. There is also a commercial building that is located adjacent to the east property line
and a commercial building located approximately 30 feet west of the west property line, however
commercial buildings are not typically considered sensitive receptors.
1.3 Proposed Project Description
The proposed project would consist of the renovating and reopening of the existing 5,726 square-foot
express carwash and 150-foot wash tunnel, adding 19 vacuum spaces, four parking spaces for employees,
and one ADA parking space. The proposed express car wash will provide two queuing lanes before the
pay station that will transition into one queuing lane with storage for up to twenty-five (25) vehicles. The
existing CMU walls on the east, south and west property lines would be increased to 7 feet in height and
rehabilitated where necessary.
The proposed project is expected to be completed and fully occupied in the year 2027. There will be 2-3
employees on site during business hours, which have not yet been determined, however the project
applicant has committed to not be open during the noise sensitive nighttime hours between 10:00 p.m.
and 7:00 a.m.. The proposed site plan is shown in Figure 2.
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City of Rosemead
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1.4 Standard Noise Regulatory Conditions
The proposed project will be required to comply with the following regulatory conditions from the City of
Rosemead and State of California.
City of Rosemead Municipal Code
The following lists the noise and vibration regulations from the Municipal Code that are applicable, but
not limited to the proposed project.
Section 8.36.030(A)(3) – Construction Noise Exemptions
Section 8.36.060 – Noise Standards
State of California Rules
The following lists the State of California noise regulations that are applicable, but not limited to the
proposed project.
California Vehicle Code Section 2700-27207 – On Road Vehicle Noise Limits
California Vehicle Code Section 38365-38350 – Off-Road Vehicle Noise Limits
1.5 Summary of Analysis Results
The following is a summary of the proposed project’s impacts with regard to the State CEQA Guidelines
noise checklist questions.
Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of
the project in excess of standards established in the local general plan or noise ordinance, or
applicable standards of other agencies?
Less than significant impact.
Generation of excessive groundborne vibration or groundborne noise levels?
Less than significant impact.
For a project located within the vicinity of a private airstrip or an airport land use plan or, where such
a plan has not been adopted, within two miles of a public airport or public use airport, would the
project expose people residing or working in the project area to excessive noise levels?
No impact.
1.6 Mitigation Measures for the Proposed Project
This analysis found that through adherence to the noise and vibration regulations detailed in Section 1.4
above, all noise and vibration impacts would be reduced to less than significant levels and no mitigation
is required.
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City of Rosemead
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2.0 NOISE FUNDAMENTALS
Noise is defined as unwanted sound. Sound becomes unwanted when it interferes with normal activities,
when it causes actual physical harm or when it has adverse effects on health. Sound is produced by the
vibration of sound pressure waves in the air. Sound pressure levels are used to measure the intensity of
sound and are described in terms of decibels. The decibel (dB) is a logarithmic unit which expresses the
ratio of the sound pressure level being measured to a standard reference level. A-weighted decibels (dBA)
approximate the subjective response of the human ear to a broad frequency noise source by
discriminating against very low and very high frequencies of the audible spectrum. They are adjusted to
reflect only those frequencies which are audible to the human ear.
2.1 Noise Descriptors
Noise Equivalent sound levels are not measured directly, but are calculated from sound pressure levels
typically measured in A-weighted decibels (dBA). The equivalent sound level (Leq) represents a steady
state sound level containing the same total energy as a time varying signal over a given sample period.
The peak traffic hour Leq is the noise metric used by California Department of Transportation (Caltrans)
for all traffic noise impact analyses.
The Day-Night Average Level (Ldn) is the weighted average of the intensity of a sound, with corrections
for time of day, and averaged over 24 hours. The time of day corrections require the addition of ten
decibels to sound levels at night between 10 p.m. and 7 a.m. While the Community Noise Equivalent Level
(CNEL) is similar to the Ldn, except that it has another addition of 4.77 decibels to sound levels during the
evening hours between 7 p.m. and 10 p.m. These additions are made to the sound levels at these time
periods because during the evening and nighttime hours, when compared to daytime hours, there is a
decrease in the ambient noise levels, which creates an increased sensitivity to sounds. For this reason,
the sound appears louder in the evening and nighttime hours and is weighted accordingly. The City of
Rosemead relies on the CNEL noise standard to assess transportation-related impacts on noise sensitive
land uses.
2.2 Tone Noise
A pure tone noise is a noise produced at a single frequency and laboratory tests have shown that humans
are more perceptible to changes in noise levels of a pure tone. For a noise source to contain a “pure
tone,” there must be a significantly higher A-weighted sound energy in a given frequency band than in the
neighboring bands, thereby causing the noise source to “stand out” against other noise sources. A pure
tone occurs if the sound pressure level in the one-third octave band with the tone exceeds the average of
the sound pressure levels of the two contiguous one-third octave bands by:
5 dB for center frequencies of 500 hertz (Hz) and above
8 dB for center frequencies between 160 and 400 Hz
15 dB for center frequencies of 125 Hz or less
2.3 Noise Propagation
From the noise source to the receiver, noise changes both in level and frequency spectrum. The most
obvious is the decrease in noise as the distance from the source increases. The manner in which noise
reduces with distance depends on whether the source is a point or line source as well as ground
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
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absorption, atmospheric effects and refraction, and shielding by natural and manmade features. Sound
from point sources, such as air conditioning condensers, radiate uniformly outward as it travels away from
the source in a spherical pattern. The noise drop-off rate associated with this geometric spreading is 6
dBA per each doubling of the distance (dBA/DD). Transportation noise sources such as roadways are
typically analyzed as line sources, since at any given moment the receiver may be impacted by noise from
multiple vehicles at various locations along the roadway. Because of the geometry of a line source, the
noise drop-off rate associated with the geometric spreading of a line source is 3 dBA/DD.
2.4 Ground Absorption
The sound drop-off rate is highly dependent on the conditions of the land between the noise source and
receiver. To account for this ground-effect attenuation (absorption), two types of site conditions are
commonly used in traffic noise models, soft-site and hard-site conditions. Soft-site conditions account for
the sound propagation loss over natural surfaces such as normal earth and ground vegetation. For point
sources, a drop-off rate of 7.5 dBA/DD is typically observed over soft ground with landscaping, as
compared with a 6.0 dBA/DD drop-off rate over hard ground such as asphalt, concrete, stone and very
hard packed earth. For line sources a 4.5 dBA/DD is typically observed for soft-site conditions compared
to the 3.0 dBA/DD drop-off rate for hard-site conditions. Caltrans research has shown that the use of soft-
site conditions is more appropriate for the application of the Federal Highway Administration (FHWA)
traffic noise prediction model used in this analysis.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
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3.0 GROUND-BORNE VIBRATION FUNDAMENTALS
Ground-borne vibrations consist of rapidly fluctuating motions within the ground that have an average
motion of zero. The effects of ground-borne vibrations typically only cause a nuisance to people, but at
extreme vibration levels damage to buildings may occur. Although ground-borne vibration can be felt
outdoors, it is typically only an annoyance to people indoors where the associated effects of the shaking
of a building can be notable. Ground-borne noise is an effect of ground-borne vibration and only exists
indoors, since it is produced from noise radiated from the motion of the walls and floors of a room and
may also consist of the rattling of windows or dishes on shelves.
3.1 Vibration Descriptors
There are several different methods that are used to quantify vibration amplitude such as the maximum
instantaneous peak in the vibrations velocity, which is known as the peak particle velocity (PPV) or the
root mean square (rms) amplitude of the vibration velocity. Due to the typically small amplitudes of
vibrations, vibration velocity is often expressed in decibels and is denoted as (Lv) and is based on the rms
velocity amplitude. A commonly used abbreviation is “VdB”, which in this text, is when Lv is based on the
reference quantity of 1 micro inch per second.
3.2 Vibration Perception
Typically, developed areas are continuously affected by vibration velocities of 50 VdB or lower. These
continuous vibrations are not noticeable to humans whose threshold of perception is around 65 VdB. Off-
site sources that may produce perceptible vibrations are usually caused by construction equipment, steel-
wheeled trains, and traffic on rough roads, while smooth roads rarely produce perceptible ground-borne
noise or vibration.
3.3 Vibration Propagation
The propagation of ground-borne vibration is not as simple to model as airborne noise. This is due to the
fact that noise in the air travels through a relatively uniform median, while ground-borne vibrations travel
through the earth which may contain significant geological differences. There are three main types of
vibration propagation; surface, compression, and shear waves. Surface waves, or Rayleigh waves, travel
along the ground’s surface. These waves carry most of their energy along an expanding circular wave
front, similar to ripples produced by throwing a rock into a pool of water. P-waves, or compression waves,
are body waves that carry their energy along an expanding spherical wave front. The particle motion in
these waves is longitudinal (i.e., in a “push-pull” fashion). P-waves are analogous to airborne sound
waves. S-waves, or shear waves, are also body waves that carry energy along an expanding spherical wave
front. However, unlike P-waves, the particle motion is transverse or “side-to-side and perpendicular to
the direction of propagation.”
As vibration waves propagate from a source, the vibration energy decreases in a logarithmic nature and
the vibration levels typically decrease by 6 VdB per doubling of the distance from the vibration source. As
stated above, this drop-off rate can vary greatly depending on the soil but has been shown to be effective
enough for screening purposes, in order to identify potential vibration impacts that may need to be
studied through actual field tests.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
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4.0 REGULATORY SETTING
The project site is located in the City of Rosemead. Noise regulations are addressed through the efforts of
various federal, state, and local government agencies. The agencies responsible for regulating noise are
discussed below.
4.1 Federal Regulations
The adverse impact of noise was officially recognized by the federal government in the Noise Control Act
of 1972, which serves three purposes:
Promulgating noise emission standards for interstate commerce
Assisting state and local abatement efforts
Promoting noise education and research
The Federal Office of Noise Abatement and Control (ONAC) was initially tasked with implementing the
Noise Control Act. However, the ONAC has since been eliminated, leaving the development of federal
noise policies and programs to other federal agencies and interagency committees. For example, the
Occupational Safety and Health Administration (OSHA) agency prohibits exposure of workers to excessive
sound levels. The Department of Transportation (DOT) assumed a significant role in noise control through
its various operating agencies. The Federal Aviation Administration (FAA) regulates noise of aircraft and
airports. Surface transportation system noise is regulated by a host of agencies, including the Federal
Transit Administration (FTA). Transit noise is regulated by the FTA, while freeways that are part of the
interstate highway system are regulated by the Federal Highway Administration (FHWA). Finally, the
federal government actively advocates that local jurisdictions use their land use regulatory authority to
arrange new development in such a way that “noise sensitive” uses are either prohibited from being sited
adjacent to a highway or, alternately that the developments are planned and constructed in such a
manner that potential noise impacts are minimized.
Although the proposed project is not under the jurisdiction of the FTA, the Transit Noise and Vibration
Impact Assessment Manual (FTA Manual), prepared by the FTA, September 2018, is a guidance document
from a government agency that has defined what constitutes a significant noise impact from
implementing a project. The FTA standards are based on extensive studies by the FTA and other
governmental agencies on the human effects and reaction to noise and a summary of the FTA findings are
provided below in Table A.
Table A – FTA Project Effects on Cumulative Noise Exposure
Existing Noise Exposure
(dBA Leq or Ldn)
Allowable Noise Impact Exposure dBA Leq or Ldn
Project Only Combined Noise Exposure Increase
45 51 52 +7
50 53 55 +5
55 55 58 +3
60 57 62 +2
65 60 66 +1
70 64 71 +1
75 65 75 0
Source: Federal Transit Administration, 2018.
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As shown in Table A, the allowable cumulative noise level increase created from a project would range
from 0 to 7 dBA, which is based on the existing (ambient) noise levels in the project vicinity. The
justification for the sliding scale, is that people already exposed to high levels of noise should be expected
to tolerate only a small increase in the amount of noise in their community. In contrast, if the existing
noise levels are quite low, it is reasonable to allow a greater change in the community noise for the
equivalent difference in annoyance.
The FTA Manual also provides specific guidance for construction noise. The FTA recommends developing
construction noise criteria on a project-specific basis that utilizes local noise ordinances if possible.
However, local noise ordinances usually relates to nuisance and hours of allowed activity and sometimes
specify limits in terms of maximum levels, but are generally not practical for assessing the noise impacts
of a construction project. Project construction noise criteria should take into account the existing noise
environment, the absolute noise levels during construction activities, the duration of the construction,
and the adjacent land uses
The FTA standards are based on extensive studies by the FTA and other governmental agencies on the
human effects and reaction to noise and a summary of the FTA findings for a Detailed Analysis of
construction noise are provided below in Table B. It should be noted that even though the project has
been analyzed based on the General Assessment methodology, the more stringent Detailed Analysis
construction noise thresholds have been utilized in this analysis.
Table B – FTA Construction Noise Criteria
Land Use
Day
(dBA Leq(8-hour))
Night
(dBA Leq(8-hour))
30-day Average
(dBA Ldn)
Residential 80 70 75
Commercial 85 85 80*
Industrial 90 90 85*
Notes:
* 24-hour Leq not Ldn.
Source: Federal Transit Administration, 2018.
Since the federal government has preempted the setting of standards for noise levels that can be emitted
by the transportation sources, the City is restricted to regulating the noise generated by the transportation
system through nuisance abatement ordinances and land use planning.
4.2 State Regulations
Noise Standards
California Department of Health Services Office of Noise Control
Established in 1973, the California Department of Health Services Office of Noise Control (ONC) was
instrumental in developing regularity tools to control and abate noise for use by local agencies. One
significant model is the “Land Use Compatibility for Community Noise Environments Matrix,” which allows
the local jurisdiction to clearly delineate compatibility of sensitive uses with various incremental levels of
noise.
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City of Rosemead
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California Noise Insulation Standards
Title 24, Chapter 1, Article 4 of the California Administrative Code (California Noise Insulation Standards)
requires noise insulation in new hotels, motels, apartment houses, and dwellings (other than single-family
detached housing) that provides an annual average noise level of no more than 45 dBA CNEL. When such
structures are located within a 60-dBA CNEL (or greater) noise contour, an acoustical analysis is required
to ensure that interior levels do not exceed the 45-dBA CNEL annual threshold. In addition, Title 21,
Chapter 6, Article 1 of the California Administrative Code requires that all habitable rooms, hospitals,
convalescent homes, and places of worship shall have an interior CNEL of 45 dB or less due to aircraft
noise.
Government Code Section 65302
Government Code Section 65302 mandates that the legislative body of each county and city in California
adopt a noise element as part of its comprehensive general plan. The local noise element must recognize
the land use compatibility guidelines published by the State Department of Health Services. The
guidelines rank noise land use compatibility in terms of normally acceptable, conditionally acceptable,
normally unacceptable, and clearly unacceptable.
California Vehicle Code Section 27200-27207 – On-Road Vehicle Noise
California Vehicle Code Section 27200-27207 provides noise limits for vehicles operated in California. For
vehicles over 10,000 pounds noise is limited to 88 dB for vehicles manufactured before 1973, 86 dB for
vehicles manufactured before 1975, 83 dB for vehicles manufactured before 1988, and 80 dB for vehicles
manufactured after 1987. All measurements are based at 50 feet from the vehicle.
California Vehicle Section 38365-38380 – Off-Road Vehicle Noise
California Vehicle Code Section 38365-38380 provides noise limits for off-highway motor vehicles
operated in California. 92 dBA for vehicles manufactured before 1973, 88 dBA for vehicles manufactured
before 1975, 86 dBA for vehicles manufactured before 1986, and 82 dBA for vehicles manufactured after
December 31, 1985. All measurements are based at 50 feet from the vehicle.
Vibration Standards
Title 14 of the California Administrative Code Section 15000 requires that all state and local agencies
implement the California Environmental Quality Act (CEQA) Guidelines, which requires the analysis of
exposure of persons to excessive groundborne vibration. However, no statute has been adopted by the
state that quantifies the level at which excessive groundborne vibration occurs.
Caltrans issued the Transportation and Construction Vibration Guidance Manual, April 2020. The Manual
provides practical guidance to Caltrans engineers, planners, and consultants who must address vibration
issues associated with the construction, operation, and maintenance of Caltrans projects. However, this
manual is also used as a reference point by many lead agencies and CEQA practitioners throughout
California, as it provides numeric thresholds for vibration impacts. Thresholds are established for
continuous (construction-related) and transient (transportation-related) sources of vibration, which
found that the human response becomes distinctly perceptible at 0.25 inch per second PPV for transient
sources and 0.04 inch per second PPV for continuous sources.
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City of Rosemead
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4.3 Local Regulations
The City of Rosemead General Plan and Municipal Code establishes the following applicable policies
related to noise and vibration.
City of Rosemead General Plan Noise Element
Goal 1: Effective incorporation of noise considerations into land use planning decisions.
Policy 1.2 Ensure compliance with standards for interior and exterior noise established within the
Noise Element and Zoning Code.
Goal 3: Effective implementation of measures to control non-transportation noise impacts.
Policy 3.2 Require that potential of noise be considered when approving new development to reduce
the possibility of adverse affects.
Policy 3.3 Evaluate noise generated by construction activities to ensure compliance with the
Community Noise Ordinance.
City of Rosemead Municipal Code
The City of Rosemead Municipal Code establishes the following applicable standards related to noise.
Section 8.36.030 – Exemptions
A. The following activities shall be exempted from the provisions of this chapter:
3. Noise sources associated by construction, repair, remodeling or grading of any real property or
during authorized seismic surveys, provided such activities do not take place between the hours
of eight p.m. and seven a.m. on weekdays, including Saturday, or at any time on Sunday or a
federal holiday, and provided the noise level created by such activities does not exceed the noise
standard of sixty-five (65) dBA plus the limits specified in Section 8.36.060(B) as measured on
residential property and does not endanger the public health, welfare and safety;
5. Noise sources associated with the maintenance of real property provided such activities take
place between the hours of seven a.m. and eight p.m. on any day except Sunday, or between the
hours of nine a.m. and eight p.m. on Sunday;
Section 8.36.050 – Designated Noise Zones
Receptor properties hereinafter described are assigned to the following noise zones:
Noise Zone I: Single-, double- and multiple-family residential properties.
Noise Zone II: Commercial properties.
Noise Zone III: Manufacturing or industrial properties.
Section 8.36.060 – Noise Standards
A. Exterior Noise Standards
1. The following noise standards, unless otherwise specifically indicated, shall apply to all receptor
properties within a designated noise zone:
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City of Rosemead
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Table C – City of Rosemead Exterior Noise Standards
Noise Zone
Type of Land Use
(Receptor Property) Time Interval
Allowable Exterior
Noise Level
I Single-, double- or multiple-family residential 10:00 p.m. – 7:00 a.m.
7:00 a.m. – 10:00 p.m.
45 dBA
60 dBA
II Commercial 10:00 p.m. – 7:00 a.m.
7:00 a.m. – 10:00 p.m.
60 dBA
65 dBA
III Industrial or Manufacturing Anytime 70 dBA
Source: City of Rosemead Municipal Code Section 8.36.060(A).
2. A person shall not in any location of the city create any noise, or allow the creation of any noise
on property owned, leased, occupied or otherwise controlled by such person (hereinafter "noise
source"), which causes the noise level when measured on any property (hereinafter "receptor
property"), to exceed:
a. The applicable noise standard for a cumulative period of time of more than thirty (30) minutes
in any hour; or
b. The applicable noise standard plus five dBA for a cumulative period of more than fifteen(15)
minutes in any hour; or
c. The applicable noise standard plus ten dBA for a cumulative period of more than five minutes
in any hour; or
d. The applicable noise standard plus fifteen (15) dBA for a cumulative period of more than one
minute in any hour; or
e. The noise standard plus twenty (20) dBA for any period of time.
3. In the event the ambient noise level exceeds any of the first three noise limit categories above,
the cumulative period applicable to said category shall be increased to reflect ambient noise level.
In the event the ambient noise level exceeds the third noise limit category, the maximum
allowable noise level under said category shall be increased to reflect the maximum ambient noise
level.
4. If the receptor property is located on a boundary between two different noise zones, the lower
noise level standard applicable to the quieter noise zone shall apply.
5. If the noise source is continuous and cannot reasonably be discontinued or stopped for a time
period whereby the ambient noise level can be determined, the measured noise level obtained
while the source is in operation shall be compared directly to the receptor property's designated
land use and for the time of day the noise level is measured.
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5.0 EXISTING NOISE CONDITIONS
To determine the existing noise levels, noise measurements have been taken in the vicinity of the project
site. The field survey noted that noise within the proposed project area is generally characterized by
vehicle traffic on Valley Boulevard and from activities at the nearby commercial properties.
5.1 Noise Measurements taken in Project Vicinity
The following describes the measurement procedures, measurement locations, and noise measurement
results of the noise measurements taken in the project vicinity.
Noise Measurement Equipment
The noise measurements were taken using three Larson Davis Model LXT1 Class 1 sound level meters
programmed in “slow” mode to record the sound pressure level at 1-second intervals for 24 hours in “A”
weighted form. In addition, the Leq averaged over the entire measuring time and Lmax were recorded with
the three sound level meters. The sound level meters and microphones were mounted on trees and
fences, were placed approximately six feet above the ground and were equipped with windscreens during
all measurements. The noise meters were calibrated before and after the monitoring using a Larson Davis
Cal200 calibrator. All noise level measurement equipment meets American National Standards Institute
(ANSI) specifications for sound level meters (ANSI S1.4-2014 standard).
Noise Measurement Locations
The noise monitoring locations were selected in order to obtain noise levels in the vicinity of the project
site. Descriptions of the noise monitoring sites are provided below in Table D and are shown in Figure 3.
Appendix A includes a photo index of the study area and noise level measurement locations.
Noise Measurement Timing and Climate
The noise measurements were recorded between 11:12 a.m. on Wednesday, May 21, 2025 and 11:21
a.m. on Thursday, May 22, 2025. At the start of the noise measurements, the sky was clear (no clouds),
the temperature was 86 degrees Fahrenheit, the humidity was 35 percent, barometric pressure was 29.55
inches of mercury, and the wind was blowing around five miles per hour. Overnight, the temperature
dropped to 59 degrees Fahrenheit and the humidity peaked at 93 percent. At the conclusion of the noise
measurements, the sky was clear, the temperature was 82 degrees Fahrenheit, the humidity was 46
percent, barometric pressure was 29.57 inches of mercury, and the wind was blowing around two miles
per hour.
Noise Measurement Results
The results of the noise level measurements are presented in Table D. The measured sound pressure levels
in dBA have been used to calculate the minimum and maximum Leq averaged over 1-hour intervals. Table
D also shows the Leq, Lmax, and CNEL, based on the entire measurement time. The CNEL was calculated
through use of Equation 2-23 from Technical Noise Supplement to the Traffic Noise Analysis Protocol
(TeNS), prepared by Caltrans, September 2013. The noise monitoring data printouts are included in
Appendix B. Figure 4 shows a graph of the 24-hour noise measurements.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 14
Table D – Existing (Ambient) Noise Level Measurements
Site
No. Site Description
Average (dBA Leq) 24- Hour Average
Daytime1 Evening2 Nighttime3 Leq CNEL4
1
Near northeast corner of project site, on window
bars on northeast side of restaurant structure,
approximately 65 feet south of Valley Boulevard
centerline.
68.8 66.7 62.6 67.1 70.9
2
Near southeast corner of carwash structure, on a
palm tree, approximately 105 feet south of Valley
Boulevard centerline.
65.3 64.5 63.1 63.9 68.4
3
Near northwest corner of the project site, on a
fence, approximately 70 feet south of Valley
Boulevard centerline.
69.1 68.5 66.5 67.6 71.7
Notes:
1 Daytime defined as 7:00 a.m. to 7:00 p.m.
2 Evening defined as 7:00 p.m. to 10:00 p.m.
3 Nighttime define as 10:00 p.m. to 7:00 a.m.
4 The 24-hour average dBA CNEL is calculated by taking the hourly Leq values and adding a penalty of 4.77 dB during the evening hours of 7 to 10
pm and adding a 10 dB penalty during the nighttime hours of 10 pm to 7 am.
Source: Noise measurements taken between Wednesday, May 27, 2025 and Thursday, May 28, 2025.
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Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 17
6.0 MODELING PARAMETERS AND ASSUMPTIONS
6.1 Construction Noise
The noise impacts from construction of the proposed project have been analyzed through use of the
FHWA’s Roadway Construction Noise Model (RCNM). The FHWA compiled noise measurement data
regarding the noise generating characteristics of several different types of construction equipment used
during the Central Artery/Tunnel project in Boston. Table E below provides a list of the construction
equipment anticipated to be used for each phase of construction that was calculated through use of the
default equipment mixes provided by the CalEEMod model published by the California Air Pollution
Control Officers Association for estimating air emissions from land use projects.
Table E – Construction Equipment Noise Emissions and Usage Factors
Equipment Description
Number of
Equipment
Acoustical Use
Factor1 (percent)
Spec 721.560 Lmax at
50 feet2 (dBA, slow3)
Actual Measured Lmax
at 50 feet4 (dBA, slow3)
Demolition
Concrete/Industrial Saw 1 20 90 90
Rubber Tired Dozer 1 40 85 82
Backhoe 1 40 80 78
Front End Loader 1 40 80 79
Tractor 1 40 84 N/A
Grading
Grader 1 40 85 83
Rubber Tired Dozer 1 40 85 82
Front End Loader 1 40 80 79
Tractor 1 40 84 N/A
Building Construction
Crane 1 16 85 81
Forklift (Gradall) 2 40 85 83
Generator 1 50 82 81
Tractor 1 40 84 N/A
Welders 3 40 73 74
Paving
Cement and Mortar Mixer 1 40 85 79
Paver 1 50 85 77
Paving Equipment 1 50 85 77
Rollers 2 20 85 80
Tractor 1 40 84 N/A
Architectural Coating
Air Compressor 1 40 80 78
Notes:
1 Acoustical use factor is the percentage of time each piece of equipment is operational during a typical workday.
2 Spec 721.560 is the equipment noise level utilized by the RCNM program.
3 The “slow” response averages sound levels over 1-second increments. A “fast” response averages sound levels over 0.125-second increments.
4 Actual Measured is the average noise level measured of each piece of equipment during the Central Artery/Tunnel project in Boston,
Massachusetts primarily during the 1990s.
Source: Federal Highway Administration, 2006.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 18
Table E also shows the associated measured noise emissions for each piece of equipment from the RCNM
model and measured percentage of typical equipment use per day. Construction noise impacts to the
nearby sensitive receptors have been calculated according to the equipment noise levels and usage
factors listed in Table E and through use of the RCNM. For each phase of construction, all construction
equipment was analyzed based on being placed in the middle of the project site, which is based on the
analysis methodology detailed in FTA Manual for a General Assessment. However, in order to provide a
conservative analysis, all equipment was analyzed, instead of just the two nosiest pieces of equipment as
detailed in the FTA Manual. In addition, 5 dB of shielding was added to the RCNM model, in order to
account for the noise reduction provided by the existing 6 foot high cmu walls that are located on the
east, south and west property lines. The RCNM model printouts are provided in Appendix C.
6.2 Operational Noise
The proposed project would create noise from an increase in traffic on the nearby roadways as well as
from onsite noise sources associated with the carwash. The offsite road noise modeling and onsite noise
modeling are described below.
Offsite Roadway Noise Modeling
The proposed project would result in increases in traffic noise to the nearby roadways. The project
impacts to the offsite roadways were analyzed through use of the FHWA Traffic Noise Prediction Model -
FHWA-RD-77-108 (FHWA Model). The FHWA Model arrives at a predicted noise level through a series of
adjustments to the Reference Energy Mean Emission Level (REMEL). Adjustments are then made to the
reference energy mean emission level to account for: the roadway active width (i.e., the distance between
the center of the outermost travel lanes on each side of the roadway), the total average daily traffic (ADT)
and the percentage of ADT which flows during the day, evening and night, the travel speed, the vehicle
mix on the roadway, which is a percentage of the volume of automobiles, medium trucks and heavy trucks,
the roadway grade, the angle of view of the observer exposed to the roadway and site conditions ("hard"
or "soft" relates to the absorption of the ground, pavement or landscaping). The following section
provides a discussion of the software and modeling input parameters used in this analysis and the FHWA
model output files are provided in Appendix D.
FHWA Model Traffic Noise Prediction Model Inputs
The roadway parameters used for this study are presented in Table F. The roadway classifications are
based on the City’s General Plan Circulation Element. The roadway speeds are based on the posted speed
limits. The distance to the nearest sensitive receptor was determined by measuring the distance from the
roadway centerline to the nearest residential structure. Since the study area is located in a suburban
environment and landscaping or natural vegetation exists along the sides of the analyzed roadways, soft
site conditions were modeled.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 19
Table F – FHWA Model Roadway Parameters
Roadway Segment
General Plan
Classification
Vehicle
Speed (MPH)
Distance to Nearest
Receptor1 (feet)
Valley Boulevard West of Rio Hondo Avenue Major Arterial 35 55
Valley Boulevard West of Project Site Major Arterial 35 60
Valley Boulevard East of Temple City Boulevard Major Arterial 35 55
Rio Hondo Avenue North of Valley Boulevard Local 25 40
Rio Hondo Avenue South of Valley Boulevard Collector 25 45
Temple City Boulevard North of Valley Boulevard Minor Arterial 35 60
Temple City Boulevard South of Valley Boulevard Minor Arterial 35 45
Notes:
1 Distance measured from nearest offsite residential structure to centerline of roadway.
Source: City of Rosemead, 2010.
The average daily traffic (ADT) volumes were obtained from the Focused Transportation Analysis for the
Proposed Sun Day Carwash Project (Traffic Analysis), prepared by Linscott Law & Greenspan, November
21, 2025. The ADT volumes for the without project conditions were calculated by multiplying the PM peak
hour volumes by 12 and the with project conditions were calculated by multiplying each roadway
distribution percentage by the net total of 1,089 ADT generated by the proposed project that were then
added to the without project ADT for each road segment analyzed. The ADT volumes used in this analysis
are shown in Table G and include without and with project conditions for both existing year and project
completion year 2027.
Table G – Average Daily Traffic Volumes
Roadway Segment
Average Daily Traffic Volumes
Existing
Existing +
Project
Year
2027
Year 2027
+Project
Valley Boulevard West of Rio Hondo Avenue 24,520 24,960 27,490 27,930
Valley Boulevard West of Project Site 22,700 23,240 25,420 25,960
Valley Boulevard East of Temple City Boulevard 21,480 21,750 23,770 24,040
Rio Hondo Avenue North of Valley Boulevard 1,520 1,570 1,550 1,600
Rio Hondo Avenue South of Valley Boulevard 6,910 6,960 7,270 7,320
Temple City Boulevard North of Valley Boulevard 23,710 23,820 25,540 25,650
Temple City Boulevard South of Valley Boulevard 19,420 19,580 20,920 21,080
Source: Linscott Law & Greenspan, 2025.
The vehicle mixes used in the FHWA-RD-77-108 Model is shown in Table H and is based on the typical
vehicle mixes observed for collector roadways in Southern California. The vehicle mix provides the hourly
distribution percentages of automobiles, medium trucks, and heavy trucks for input into the FHWA model.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 20
Table H – Roadway Vehicle Mixes
Vehicle Type
Traffic Flow Distributions
Day
(7 a.m. to 7 p.m.)
Evening
(7 p.m. to 10 p.m.)
Night
(10 p.m. to 7 a.m.) Overall
Collector & Local
Automobiles 73.60% 13.60% 10.22% 97.42%
Medium Trucks 0.90% 0.04% 0.9% 1.84%
Heavy Trucks 0.35% 0.04% 0.35% 0.74%
Major & Minor Arterials
Automobiles 69.50% 12.90% 9.60% 92.00%
Medium Trucks 1.44% 0.06% 1.50% 3.00%
Heavy Trucks 2.40% 0.10% 2.50% 5.00%
Source: Vista Environmental.
FHWA Model Source Assumptions
To assess the roadway noise generation in a uniform manner, all vehicles are analyzed at the single lane
equivalent acoustic center of the roadway being analyzed. In order to determine the height above the
road grade where the noise is being emitted from, each type of vehicle has been analyzed independently
with autos at road grade, medium trucks at 2.3 feet above road grade, and heavy trucks at 8 feet above
road grade. These elevations were determined through a noise-weighted average of the elevation of the
exhaust pipe, tires and mechanical parts in the engine, which are the primary noise emitters from a
vehicle.
Onsite Carwash Noise Modeling
In order to determine the anticipated noise created by the proposed carwash and vacuum stations,
reference noise measurements were taken at the Fast5Xpress Carwash located at 19150 Harborgate Way,
Torrance. The following describes the reference noise measurements and the noise propagation and
sound wall noise reduction methodology used to calculate the noise levels at the nearby receptors.
Reference Noise Measurements
The reference noise measurements were taken using a Larson-Davis Model 831 Type 1 precision sound
level meter programmed in “slow” mode to record noise levels in “A” weighted form as well as the
frequency spectrum of the noise broken down into 1/3 octaves. The sound level meter and microphone
were mounted on a tripod five feet above the ground and were equipped with a windscreen during all
measurements. The sound level meter was calibrated before and after the monitoring using a Larson-
Davis calibrator, Model CAL 200. The accuracy of the calibrator is maintained through a program
established through the manufacturer and is traceable to the National Bureau of Standards. The unit
meets the requirements of ANSI Standard S1.4-1984 and IEC Standard 942: 1988 for Class 1 equipment.
All noise level measurement equipment meets American National Standards Institute (ANSI) specifications
for sound level meters (S1.4-1983 identified in Chapter 19.68.020.AA).
Each reference noise measurement was taken for a period of 10 minutes while the carwash was
operational and in the process of washing cars. The reference noise measurement locations were selected
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 21
in order to capture representative noise measurements of the various locations where the carwash emits
noise, which consists of the exit and entrance to the carwash (both aligned and 90 degree angles from
exit and entrance) as well as the side of the carwash aligned with the vents to the equipment room and
from the vacuum parking stalls. The results of the reference noise level measurements are presented in
Table I and the reference noise measurement data printouts are included in Appendix E.
Table I – Reference Noise Level Measurements of Torrance Fast5Xpress Carwash
Site
No. Location
Primary Noise
Source
Noise Measurement (dBA)
Leq Lmax
R1 Side of Carwash entrance, approximately 48 feet from
carwash entrance door.
Carwash
entrance 61.5 77.9
R2 Middle of Carwash aligned with air vent, approximately 30
feet from side of structure.
Carwash side
air vent 64.5 70.3
R3 Side of Carwash exit, approximately 45 feet from carwash
exit door. Carwash exit 66.6 82.5
R4 Located approximately 15 feet from the car vacuum
stations.
Vacuum
Stations 67.3 73.1
Source: Noise measurements taken with a Larson Davis Model 831 Type 1 precision sound level meter.
Noise Propagation and Sound Wall Noise Reduction
The noise levels at the nearby receptors were calculated based on the methodology provided in the FHWA
Highway Traffic Noise Prediction Model (FHWA-RD-77-108) that is described in the Technical Noise
Supplement to the Traffic Noise Analysis Protocol (TeNS), prepared by Caltrans, September 2013. Since
the project site will be mostly paved, the hard site drop off rates for point sources was utilized that results
in a drop off rate of 6.0 dB per doubling the distance between source and receptor and was calculated
based on the following equation:
dBA2 = dBA1 + 10log10[(D1/D2)]1 = dBA1 + 20log10(D1/D2)
where:
dBA1 = noise level at distance D1
dBA2 = noise level at distance D2
In order to account for the noise reduction provided by the proposed 7-foot high CMU sound walls on the
east, south and west sides, the following noise barrier noise attenuation formulas were utilized and the
spreadsheet printouts are provided in Appendix F:
N0 = 2(Ꟙ0/ꭚ)
Where:
N0 = Fresnel number determined along the perpendicular line between source and receiver (i.e.,
barrier must be perpendicular to the direct noise path)
Ꟙ0 = Ꟙ measured along perpendicular line to barrier
ꭚ = wavelength of sound radiated by source
Ꟙ = a + b – c
Where:
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 22
Ꟙ = Path length difference
a = distance from source to top of barrier
b = distance from top of barrier to receiver
c = distance from source to receiver (straight line)
6.3 Vibration
Construction activity can result in varying degrees of ground vibration, depending on the equipment used
on the site. Operation of construction equipment causes ground vibrations that spread through the
ground and diminish in strength with distance. Buildings in the vicinity of the construction site respond
to these vibrations with varying results ranging from no perceptible effects at the low levels to slight
damage at the highest levels. Table J gives approximate vibration levels for particular construction
activities. The data in Table J provides a reasonable estimate for a wide range of soil conditions.
Table J – Vibration Source Levels for Construction Equipment
Equipment
Peak Particle Velocity
(inches/second)
Approximate Vibration Level
(Lv)at 25 feet
Pile driver (impact) Upper range
typical
1.518
0.644
112
104
Pile driver (sonic) Upper range
typical
0.734
0.170
105
93
Clam shovel drop (slurry wall) 0.202 94
Vibratory Roller 0.210 94
Hoe Ram 0.089 87
Large bulldozer 0.089 87
Caisson drill 0.089 87
Loaded trucks 0.076 86
Jackhammer 0.035 79
Small bulldozer 0.003 58
Source: Federal Transit Administration, 2020.
The construction-related vibration impacts have been calculated through the vibration levels shown
above in Table J and through typical vibration propagation rates. The equipment assumptions were based
on the equipment lists provided above in Table E.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 23
7.0 IMPACT ANALYSIS
7.1 CEQA Thresholds of Significance
Consistent with the California Environmental Quality Act (CEQA) and the State CEQA Guidelines, a
significant impact related to noise would occur if a proposed project is determined to result in:
Generation of a substantial temporary or permanent increase in ambient noise levels in the
vicinity of the project in excess of standards established in the local general plan or noise
ordinance, or applicable standards of other agencies;
Generation of excessive groundborne vibration or groundborne noise levels; or
For a project located within the vicinity of a private airstrip or an airport land use plan or, where
such a plan has not been adopted, within two miles of a public airport or public use airport, would
the project expose people residing or working in the project area to excessive noise levels.
7.2 Generation of Noise Levels in Excess of Standards
The proposed project would not generate a substantial temporary or permanent increase in ambient
noise levels in the vicinity of the project in excess of standards established in the local general plan or
noise ordinance, or applicable standards of other agencies. The following section calculates the potential
noise emissions associated with the temporary construction activities and long-term operations of the
proposed project and compares the noise levels to the City standards.
Construction-Related Noise
The construction activities for the proposed project are anticipated to include demolition of the restaurant
and house that was used as a business, grading of the project site, renovation of the existing carwash
building, paving of the onsite driveways and parking areas, and application of architectural coatings. Noise
impacts from construction activities associated with the proposed project would be a function of the noise
generated by construction equipment, equipment location, sensitivity of nearby land uses, and the timing
and duration of the construction activities.
Section 8.36.030(A)(3) of the City’s Municipal Code exempts construction noise from the noise ordinance
provided such activities do not take place between the hours of eight p.m. and seven a.m. on weekdays,
including Saturday, or at any time on Sunday or a federal holiday. All construction activities associated
with the proposed project would occur during the allowable hours for construction activities as detailed
in Section 8.36.030(A)(3) of the Municipal Code.
However, the City construction noise standards do not provide any limits to the noise levels that may be
created from construction activities during allowable hours for construction activities. As such, even with
adherence to the City standards, the resultant construction noise levels may result in a significant
substantial temporary noise increase to the nearby residents. In order to determine if the proposed
construction activities would create a significant substantial temporary noise increase, the FTA
construction noise criteria thresholds detailed above in Section 4.1 have been utilized, which shows that
a significant construction noise impact would occur if construction noise exceeds 80 dBA at the nearby
homes or 85 dBA at the nearby commercial uses.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 24
Construction noise levels to the nearby sensitive receptors have been calculated through use of the RCNM
and the parameters and assumptions detailed in Section 6.1 of this report including Table E – Construction
Equipment Noise Emissions and Usage Factors. The results are shown below in Table K and the RCNM
printouts are provided in Appendix C.
Table K – Construction Noise Levels at the Nearby Receptors
Construction Phase
Construction Noise Level (dBA Leq) at:
Commercial Building to
East1
Homes to
South2
Commercial Building to
West3
Demolition 73 75 70
Grading 72 74 69
Building Construction 71 74 69
Paving 73 75 70
Painting 60 63 58
FTA Construction Noise Thresholds4 85 80 85
Exceed Thresholds? No No No
Notes:
1 The commercial building to the east is located as near as 130 feet from the center of the project site.
2 The homes to the south are located as near as 100 feet from center of the project site.
3 The commercial building to the west is located as near as 180 feet from the center of the project site.
4 The FTA daytime commercial noise threshold from Table B, above.
Source: RCNM, Federal Highway Administration, 2006
Table K shows that the greatest noise impacts would occur during the demolition and paving phases, with
noise levels as high as 73 dBA Leq at the commercial building to the east, 75 dBA Leq at the homes to the
south, and 70 dBA Leq at the commercial building to the west. The calculated construction noise levels
shown in Table K are below the FTA construction noise standards of 80 dBA for residential uses and 85
dBA for commercial uses. Therefore, through adherence to allowable construction times provided in
Section 8.36.030(A)(3) of the Municipal Code, the construction activities for the proposed project would
not create a substantial temporary increase in ambient noise levels that are in excess of applicable noise
standards. Impacts would be less than significant.
Operational-Related Noise
Potential noise impacts associated with the operations of the proposed project would be from project-
generated vehicular traffic on the nearby roadways and from onsite activities, which have been analyzed
separately below.
Roadway Vehicular Noise Impacts
Vehicle noise is a combination of the noise produced by the engine, exhaust and tires. The level of traffic
noise depends on three primary factors (1) the volume of traffic, (2) the speed of traffic, and (3) the
number of trucks in the flow of traffic. The proposed project does not propose any uses that would require
a substantial number of truck trips and the proposed project would not alter the speed limit on any
existing roadway so the proposed project’s potential offsite noise impacts have been focused on the noise
impacts associated with the change of volume of traffic that would occur with development of the
proposed project.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 25
Since neither the General Plan nor the CEQA Guidelines define what constitutes a “substantial permanent
increase to ambient noise levels”, this impact analysis has utilized guidance from the Federal Transit
Administration for a moderate impact that has been detailed above in Table A that shows that the project
contribution to the noise environment can range between 0 and 7 dB, which is dependent on the existing
noise levels.
The potential offsite traffic noise impacts created by the on-going operations of the proposed project have
been analyzed through utilization of the FHWA model and parameters described above in Section 6.2 and
the FHWA model traffic noise calculation spreadsheets are provided in Appendix D. The proposed
project’s potential offsite traffic noise impacts have been analyzed for the existing year and opening year
2027 scenarios that are discussed separately below.
Existing Year Conditions
The proposed project’s potential offsite traffic noise impacts have been calculated through a comparison
of the Existing scenario to the Existing With Project scenario. The results of this comparison are shown in
Table L.
Table L – Existing Year Project Traffic Noise Contributions
dBA CNEL at Nearest Receptor1
Increase
Threshold2 Roadway Segment Existing
Existing Plus
Project
Project
Contribution
Valley Boulevard West of Rio Hondo Avenue 66.7 66.8 +0.1 +1 dBA
Valley Boulevard West of Project Site 65.6 65.7 +0.1 +1 dBA
Valley Boulevard East of Temple City Boulevard 66.1 66.2 +0.1 +1 dBA
Rio Hondo Avenue North of Valley Boulevard 51.9 52.0 +0.1 +5 dBA
Rio Hondo Avenue South of Valley Boulevard 59.2 59.3 +0.1 +3 dBA
Temple City Boulevard North of Valley Boulevard 66.0 66.1 +0.1 +1 dBA
Temple City Boulevard South of Valley Boulevard 67.5 67.5 +0.0 +1 dBA
Notes:
1 Distance to nearest sensitive receptors shown in Table F, does not take into account existing noise barriers.
2 Increase Threshold obtained from the FTA’s allowable noise impact exposures detailed above in Table A.
3 Since measured noise levels (see Table D, above) exceeded calculated road noise levels, measured noise levels were added to calculated road
noise levels.
Source: FHWA Traffic Noise Prediction Model FHWA-RD-77-108.
Table L shows that the proposed project’s permanent noise increases to the nearby homes from the
generation of additional vehicular traffic would not exceed the traffic noise increase thresholds detailed
above. Therefore, the proposed project would not result in a substantial permanent increase in ambient
noise levels for the existing conditions. Impacts would be less than significant.
Opening Year 2027 Conditions
The proposed project’s potential offsite traffic noise impacts have been calculated through a comparison
of the opening year 2027 scenario to the opening year 2027 with project scenario. The results of this
comparison are shown in Table M.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 26
Table M – Opening Year 2027 Project Traffic Noise Contributions
dBA CNEL at Nearest Receptor1
Increase
Threshold2 Roadway Segment
Year
2026
Year 2026 Plus
Project
Project
Contribution
Valley Boulevard West of Rio Hondo Avenue 67.2 67.2 +0.0 +1 dBA
Valley Boulevard West of Project Site 66.1 66.2 +0.1 +1 dBA
Valley Boulevard East of Temple City Boulevard 66.5 66.6 +0.1 +1 dBA
Rio Hondo Avenue North of Valley Boulevard 51.9 52.1 +0.2 +5 dBA
Rio Hondo Avenue South of Valley Boulevard 59.5 59.5 +0.0 +2 dBA
Temple City Boulevard North of Valley Boulevard 66.4 66.4 +0.0 +1 dBA
Temple City Boulevard South of Valley Boulevard 67.8 67.8 +0.0 +1 dBA
Notes:
1 Distance to nearest sensitive receptors shown in Table F, does not take into account existing noise barriers.
2 Increase Threshold obtained from the FTA’s allowable noise impact exposures detailed above in Table A.
3 Since measured noise levels (see Table D, above) exceeded calculated road noise levels, measured noise levels were added to calculated road
noise levels..
Source: FHWA Traffic Noise Prediction Model FHWA-RD-77-108.
Table M shows that the proposed project’s permanent noise increases to the nearby homes from the
generation of additional vehicular traffic would not exceed the traffic noise increase thresholds detailed
above. Therefore, the proposed project would not result in a substantial permanent increase in ambient
noise levels for the opening year 2027 conditions. Impacts would be less than significant.
Onsite Noise Impacts
The operation of the proposed project may create an increase in onsite noise levels from noise impacts
from the automated carwash and vacuum stall parking spaces. The business hours of the carwash have
not yet been determined, however the project applicant has committed to not operate the carwash during
the noise sensitive nighttime hours between 10:00 p.m. and 7:00 a.m..
Section 8.36.060(A) of the City’s Municipal Code limits noise created on the project site between the hours
of 7:00 a.m. and 10:00 p.m. at the homes to the south to 60 dBA and at the commercial buildings to the
east and west to 65 dBA.
The nearest sensitive receptors are the single-family homes to the south that are as near as 10 feet south
of the project site. There is also a commercial building that is located adjacent to the east property line
and a commercial building located approximately 30 feet west of the west property line. Onsite
operational noise impacts to the nearby receptors have been calculated based on the methodology
detailed above in Section 6.2 and printouts of the reference noise measurements are provided in
Appendix E and the noise propagation and sound wall calculations are provided in Appendix F. Table N
shows the calculated onsite noise levels at the nearby receptors.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 27
Table N – Operational Onsite Noise Levels at the Nearby Sensitive Receptors
Noise Source
Calculated Noise Levels (dBA Leq) at1:
Commercial to East Homes to South Commercial to West
Carwash Entrance Side 46.1 40.3 40.5
Middle of Carwash Side 33.0 34.7 37.2
Carwash Exit Side 34.1 40.3 49.6
Vacuum Stations 55.7 55.0 37.9
Vacuum Producer 36.1 37.7 39.0
City Daytime Noise Standard2 65 60 65
Exceed City Noise Standard? No No No
Notes:
1 The carwash noise source reference measurements are provided in Appendix E and the noise propagation and sound wall calculations are
provided in Appendix F.
2 The City Noise Standards were obtained from Section 8.36.060(A) of the Municipal Code.
Table N shows that the proposed project’s operational noise level created from multiple points of the
carwash and vacuum stalls would be as high as 55.7 dBA at the commercial property to the east and 55.0
dBA at the homes to the south. Table N shows that the operational carwash noise levels would be below
the City’s applicable commercial and residential noise standards. Therefore, operational noise impacts
would be less than significant.
Level of Significance
Less than significant impact.
7.3 Generation of Excessive Groundborne Vibration
The proposed project would not expose persons to or generation of excessive groundborne vibration or
groundborne noise levels. The following section analyzes the potential vibration impacts associated with
the construction and operations of the proposed project.
Construction-Related Vibration Impacts
The construction activities for the proposed project are anticipated to include demolition of the restaurant
and house that was used as a business, grading of the project site, renovation of the existing carwash
building, paving of the onsite driveways and parking areas, and application of architectural coatings. The
nearest offsite sensitive receptor to the project site is the commercial building adjacent to the east side
of the project site.
Since neither the City of Rosemead General Plan or Municipal Code provide any vibration standards for
construction activities, Caltrans guidance that is detailed in Section 4.2 has been utilized, which defines
the threshold of perception from transient sources at 0.25 inch per second PPV.
The primary source of vibration during construction would be from the operation of a small dozer, since
the project site is not large enough to operate a large dozer. From Table J above a small dozer would
create a vibration level of 0.003 inch per second PPV at 25 feet. Based on typical propagation rates, the
vibration level at the nearest structure to the east (6 feet from acoustical center of small dozer to
structure) would be 0.01 inch per second PPV. The vibration level at the nearest offsite structure would
be below the 0.25 inch per second PPV threshold detailed above. Impacts would be less than significant.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 28
Operations-Related Vibration Impacts
The proposed project would consist of the renovation of a carwash. The on-going operation of the
proposed project would not include the operation of any known vibration sources. Therefore, a less than
significant vibration impact is anticipated from the operation of the proposed project.
Level of Significance
Less than significant impact.
7.4 Aircraft Noise
The proposed project would not expose people residing or working in the project area to excessive noise
levels from aircraft. The nearest airport is San Gabriel Valley Airport that is located approximately 1.4
miles east of the project site. The project site is located outside of the 60 dBA CNEL noise contours of the
Airport. No impacts would occur from aircraft noise.
Level of Significance
No impact.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Page 29
8.0 REFERENCES
California Department of Transportation (Caltrans), Technical Noise Supplement to the Traffic Noise
Analytics Protocol, September 2013.
California Department of Transportation, Transportation and Construction Vibration Guidance Manual,
April 2020.
City of Rosemead, City of Rosemead General Plan Update, adopted April 13, 2010.
City of Rosemead, City of Rosemead Municipal Code, August 14, 2025.
Federal Transit Administration, Transit Noise and Vibration Impact Assessment, September 2018.
Linscott Law & Greenspan, Focused Transportation Analysis for the Proposed Sun Day Carwash Project,
November 21, 2025.
U.S. Department of Transportation, FHWA Roadway Construction Noise Model User’s Guide, January,
2006.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Appendix A
APPENDIX A
Field Noise Measurements Photo Index
Noise Measurement Site 1 - looking north Noise Measurement Site 1 - looking northeast
Noise Measurement Site 1 - looking east Noise Measurement Site 1 - looking southeast
Noise Measurement Site 1 - looking south Noise Measurement Site 1 - looking southwest
Noise Measurement Site 1 - looking west Noise Measurement Site 1 - looking northwest
Noise Measurement Site 2 - looking north Noise Measurement Site 2 - looking northeast
Noise Measurement Site 2 - looking east Noise Measurement Site 2 - looking southeast
Noise Measurement Site 2 - looking south Noise Measurement Site 2 - looking southwest
Noise Measurement Site 2 - looking west Noise Measurement Site 2 - looking northwest
Noise Measurement Site 3 - looking north Noise Measurement Site 3 - looking northeast
Noise Measurement Site 3 - looking east Noise Measurement Site 3 - looking southeast
Noise Measurement Site 3 - looking south Noise Measurement Site 3 - looking southwest
Noise Measurement Site 3 - looking west Noise Measurement Site 3 - looking northwest
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Appendix B
APPENDIX B
Field Noise Measurements Printouts
Leq Daytime = 68.8 Leq Daytime = 65.3 Leq Daytime = 69.1
Freq Weighting=A Leq Evening = 66.7 Freq Weighting=A Leq Evening = 64.5 Freq Weighting=A Leq Evening = 68.5
86402 Leq Nighttime = 62.6 86402 Leq Nighttime = 63.1 86402 Leq Nighttime = 66.5
Leq = 67.1 Ldn(24hr)= 70.5 CNEL = 70.9 Leq = 63.9 Ldn(24hr)= 67.9 CNEL = 68.4 Leq = 67.6 Ldn(24hr)= 71.1 CNEL = 71.7
Min = 44.0 Min Leq hr at 2:30 AM 57.7 Min = 45.7 Min Leq hr at 2:30 AM 55.2 Min = 45.8 Min Leq hr at 2:30 AM 58.7
Max = 105.1 Max Leq hr at 2:24 PM 73.0 Max = 96.0 Max Leq hr at 5:03 PM 67.1 Max = 95.6 Max Leq hr at 5:37 PM 70.3
SPL Time Leq (1 hour Avg.) Ldn CNEL SPL Time Leq (1 hour Avg.) Ldn CNEL SPL Time Leq (1 hour Avg.) Ldn CNEL
61.9 11:12:26 61.9 61.9 53.3 11:17:27 53.3 53.3 71.2 11:21:57 71.2 71.2
69.0 11:12:27 69.0 69.0 64.0 11:17:28 64.0 64.0 69.8 11:21:58 69.8 69.8
71.1 11:12:28 71.1 71.1 68.1 11:17:29 68.1 68.1 68.1 11:21:59 68.1 68.1
73.0 11:12:29 73.0 73.0 67.3 11:17:30 67.3 67.3 67.8 11:22:00 67.8 67.8
65.8 11:12:30 65.8 65.8 83.4 11:17:31 83.4 83.4 72.1 11:22:01 72.1 72.1
66.0 11:12:31 66.0 66.0 69.7 11:17:32 69.7 69.7 73.6 11:22:02 73.6 73.6
77.9 11:12:32 77.9 77.9 61.7 11:17:33 61.7 61.7 73.6 11:22:03 73.6 73.6
74.2 11:12:33 74.2 74.2 58.7 11:17:34 58.7 58.7 77.1 11:22:04 77.1 77.1
71.0 11:12:34 71.0 71.0 68.7 11:17:35 68.7 68.7 72.4 11:22:05 72.4 72.4
74.1 11:12:35 74.1 74.1 70.8 11:17:36 70.8 70.8 71.1 11:22:06 71.1 71.1
73.9 11:12:36 73.9 73.9 64.0 11:17:37 64.0 64.0 66.2 11:22:07 66.2 66.2
71.3 11:12:37 71.3 71.3 67.3 11:17:38 67.3 67.3 67.4 11:22:08 67.4 67.4
76.7 11:12:38 76.7 76.7 63.8 11:17:39 63.8 63.8 69.7 11:22:09 69.7 69.7
70.6 11:12:39 70.6 70.6 63.0 11:17:40 63.0 63.0 70.2 11:22:10 70.2 70.2
71.3 11:12:40 71.3 71.3 64.3 11:17:41 64.3 64.3 66.6 11:22:11 66.6 66.6
72.7 11:12:41 72.7 72.7 67.1 11:17:42 67.1 67.1 67.3 11:22:12 67.3 67.3
71.6 11:12:42 71.6 71.6 61.6 11:17:43 61.6 61.6 70.1 11:22:13 70.1 70.1
66.8 11:12:43 66.8 66.8 56.3 11:17:44 56.3 56.3 68.7 11:22:14 68.7 68.7
66.2 11:12:44 66.2 66.2 60.4 11:17:45 60.4 60.4 72.0 11:22:15 72.0 72.0
62.6 11:12:45 62.6 62.6 65.2 11:17:46 65.2 65.2 73.1 11:22:16 73.1 73.1
64.1 11:12:46 64.1 64.1 64.6 11:17:47 64.6 64.6 84.4 11:22:17 84.4 84.4
67.1 11:12:47 67.1 67.1 60.7 11:17:48 60.7 60.7 85.4 11:22:18 85.4 85.4
65.1 11:12:48 65.1 65.1 55.0 11:17:49 55.0 55.0 78.4 11:22:19 78.4 78.4
70.5 11:12:49 70.5 70.5 57.8 11:17:50 57.8 57.8 77.9 11:22:20 77.9 77.9
75.5 11:12:50 75.5 75.5 60.6 11:17:51 60.6 60.6 67.0 11:22:21 67.0 67.0
61.8 11:12:51 61.8 61.8 61.4 11:17:52 61.4 61.4 76.1 11:22:22 76.1 76.1
67.9 11:12:52 67.9 67.9 64.1 11:17:53 64.1 64.1 72.8 11:22:23 72.8 72.8
61.3 11:12:53 61.3 61.3 64.1 11:17:54 64.1 64.1 72.0 11:22:24 72.0 72.0
64.8 11:12:54 64.8 64.8 68.2 11:17:55 68.2 68.2 66.7 11:22:25 66.7 66.7
66.7 11:12:55 66.7 66.7 70.4 11:17:56 70.4 70.4 63.7 11:22:26 63.7 63.7
62.5 11:12:56 62.5 62.5 63.9 11:17:57 63.9 63.9 67.1 11:22:27 67.1 67.1
59.5 11:12:57 59.5 59.5 65.6 11:17:58 65.6 65.6 65.3 11:22:28 65.3 65.3
61.3 11:12:58 61.3 61.3 74.2 11:17:59 74.2 74.2 69.7 11:22:29 69.7 69.7
65.9 11:12:59 65.9 65.9 70.7 11:18:00 70.7 70.7 68.1 11:22:30 68.1 68.1
69.7 11:13:00 69.7 69.7 68.3 11:18:01 68.3 68.3 75.8 11:22:31 75.8 75.8
72.2 11:13:01 72.2 72.2 60.3 11:18:02 60.3 60.3 74.6 11:22:32 74.6 74.6
71.7 11:13:02 71.7 71.7 65.0 11:18:03 65.0 65.0 77.9 11:22:33 77.9 77.9
68.8 11:13:03 68.8 68.8 68.9 11:18:04 68.9 68.9 78.5 11:22:34 78.5 78.5
70.1 11:13:04 70.1 70.1 72.9 11:18:05 72.9 72.9 76.1 11:22:35 76.1 76.1
67.5 11:13:05 67.5 67.5 73.4 11:18:06 73.4 73.4 72.6 11:22:36 72.6 72.6
72.2 11:13:06 72.2 72.2 72.4 11:18:07 72.4 72.4 74.5 11:22:37 74.5 74.5
70.0 11:13:07 70.0 70.0 71.1 11:18:08 71.1 71.1 76.5 11:22:38 76.5 76.5
67.5 11:13:08 67.5 67.5 67.0 11:18:09 67.0 67.0 70.8 11:22:39 70.8 70.8
67.5 11:13:09 67.5 67.5 64.8 11:18:10 64.8 64.8 71.5 11:22:40 71.5 71.5
77.5 11:13:10 77.5 77.5 65.6 11:18:11 65.6 65.6 68.6 11:22:41 68.6 68.6
76.4 11:13:11 76.4 76.4 71.4 11:18:12 71.4 71.4 66.8 11:22:42 66.8 66.8
70.6 11:13:12 70.6 70.6 70.5 11:18:13 70.5 70.5 67.4 11:22:43 67.4 67.4
68.2 11:13:13 68.2 68.2 72.1 11:18:14 72.1 72.1 59.9 11:22:44 59.9 59.9
68.9 11:13:14 68.9 68.9 73.0 11:18:15 73.0 73.0 62.5 11:22:45 62.5 62.5
75.1 11:13:15 75.1 75.1 79.8 11:18:16 79.8 79.8 63.6 11:22:46 63.6 63.6
70.3 11:13:16 70.3 70.3 65.1 11:18:17 65.1 65.1 66.4 11:22:47 66.4 66.4
73.5 11:13:17 73.5 73.5 64.7 11:18:18 64.7 64.7 66.1 11:22:48 66.1 66.1
68.6 11:13:18 68.6 68.6 63.6 11:18:19 63.6 63.6 69.2 11:22:49 69.2 69.2
69.5 11:13:19 69.5 69.5 64.8 11:18:20 64.8 64.8 72.9 11:22:50 72.9 72.9
71.1 11:13:20 71.1 71.1 65.1 11:18:21 65.1 65.1 73.6 11:22:51 73.6 73.6
72.4 11:13:21 72.4 72.4 65.6 11:18:22 65.6 65.6 75.4 11:22:52 75.4 75.4
74.4 11:13:22 74.4 74.4 67.4 11:18:23 67.4 67.4 71.0 11:22:53 71.0 71.0
75.5 11:13:23 75.5 75.5 68.6 11:18:24 68.6 68.6 73.8 11:22:54 73.8 73.8
68.5 11:13:24 68.5 68.5 61.4 11:18:25 61.4 61.4 70.0 11:22:55 70.0 70.0
69.2 11:13:25 69.2 69.2 58.5 11:18:26 58.5 58.5 69.3 11:22:56 69.3 69.3
73.7 11:13:26 73.7 73.7 68.1 11:18:27 68.1 68.1 73.1 11:22:57 73.1 73.1
78.7 11:13:27 78.7 78.7 64.3 11:18:28 64.3 64.3 71.3 11:22:58 71.3 71.3
72.4 11:13:28 72.4 72.4 60.0 11:18:29 60.0 60.0 70.5 11:22:59 70.5 70.5
72.9 11:13:29 72.9 72.9 66.3 11:18:30 66.3 66.3 72.4 11:23:00 72.4 72.4
74.2 11:13:30 74.2 74.2 63.8 11:18:31 63.8 63.8 73.9 11:23:01 73.9 73.9
77.7 11:13:31 77.7 77.7 62.3 11:18:32 62.3 62.3 69.6 11:23:02 69.6 69.6
76.5 11:13:32 76.5 76.5 61.1 11:18:33 61.1 61.1 71.1 11:23:03 71.1 71.1
84.5 11:13:33 84.5 84.5 62.1 11:18:34 62.1 62.1 73.2 11:23:04 73.2 73.2
77.5 11:13:34 77.5 77.5 64.6 11:18:35 64.6 64.6 69.4 11:23:05 69.4 69.4
81.9 11:13:35 81.9 81.9 67.4 11:18:36 67.4 67.4 67.3 11:23:06 67.3 67.3
80.9 11:13:36 80.9 80.9 65.6 11:18:37 65.6 65.6 70.4 11:23:07 70.4 70.4
81.7 11:13:37 81.7 81.7 60.2 11:18:38 60.2 60.2 71.4 11:23:08 71.4 71.4
80.2 11:13:38 80.2 80.2 59.0 11:18:39 59.0 59.0 67.3 11:23:09 67.3 67.3
70.8 11:13:39 70.8 70.8 60.0 11:18:40 60.0 60.0 66.7 11:23:10 66.7 66.7
59.5 11:13:40 59.5 59.5 79.8 11:18:41 79.8 79.8 66.3 11:23:11 66.3 66.3
62.2 11:13:41 62.2 62.2 60.5 11:18:42 60.5 60.5 65.8 11:23:12 65.8 65.8
66.1 11:13:42 66.1 66.1 59.1 11:18:43 59.1 59.1 64.4 11:23:13 64.4 64.4
69.1 11:13:43 69.1 69.1 60.2 11:18:44 60.2 60.2 70.2 11:23:14 70.2 70.2
68.7 11:13:44 68.7 68.7 64.3 11:18:45 64.3 64.3 69.9 11:23:15 69.9 69.9
69.0 11:13:45 69.0 69.0 65.2 11:18:46 65.2 65.2 67.6 11:23:16 67.6 67.6
72.8 11:13:46 72.8 72.8 71.0 11:18:47 71.0 71.0 69.2 11:23:17 69.2 69.2
65.4 11:13:47 65.4 65.4 66.6 11:18:48 66.6 66.6 66.5 11:23:18 66.5 66.5
66.8 11:13:48 66.8 66.8 60.7 11:18:49 60.7 60.7 65.1 11:23:19 65.1 65.1
68.2 11:13:49 68.2 68.2 64.9 11:18:50 64.9 64.9 69.2 11:23:20 69.2 69.2
70.3 11:13:50 70.3 70.3 80.8 11:18:51 80.8 80.8 69.3 11:23:21 69.3 69.3
70.2 11:13:51 70.2 70.2 70.0 11:18:52 70.0 70.0 83.3 11:23:22 83.3 83.3
68.6 11:13:52 68.6 68.6 69.7 11:18:53 69.7 69.7 76.6 11:23:23 76.6 76.6
64.7 11:13:53 64.7 64.7 72.3 11:18:54 72.3 72.3 75.3 11:23:24 75.3 75.3
63.3 11:13:54 63.3 63.3 64.0 11:18:55 64.0 64.0 67.9 11:23:25 67.9 67.9
67.4 11:13:55 67.4 67.4 68.7 11:18:56 68.7 68.7 71.1 11:23:26 71.1 71.1
61.8 11:13:56 61.8 61.8 61.5 11:18:57 61.5 61.5 74.8 11:23:27 74.8 74.8
63.0 11:13:57 63.0 63.0 61.6 11:18:58 61.6 61.6 72.2 11:23:28 72.2 72.2
64.0 11:13:58 64.0 64.0 64.9 11:18:59 64.9 64.9 73.0 11:23:29 73.0 73.0
70.5 11:13:59 70.5 70.5 63.8 11:19:00 63.8 63.8 76.7 11:23:30 76.7 76.7
74.0 11:14:00 74.0 74.0 62.7 11:19:01 62.7 62.7 72.9 11:23:31 72.9 72.9
67.8 11:14:01 67.8 67.8 63.5 11:19:02 63.5 63.5 68.9 11:23:32 68.9 68.9
64.8 11:14:02 64.8 64.8 66.5 11:19:03 66.5 66.5 79.0 11:23:33 79.0 79.0
64.9 11:14:03 64.9 64.9 63.2 11:19:04 63.2 63.2 65.5 11:23:34 65.5 65.5
72.7 11:14:04 72.7 72.7 68.8 11:19:05 68.8 68.8 79.6 11:23:35 79.6 79.6
73.6 11:14:05 73.6 73.6 69.7 11:19:06 69.7 69.7 68.4 11:23:36 68.4 68.4
64.4 11:14:06 64.4 64.4 65.9 11:19:07 65.9 65.9 81.8 11:23:37 81.8 81.8
66.5 11:14:07 66.5 66.5 66.2 11:19:08 66.2 66.2 80.6 11:23:38 80.6 80.6
71.8 11:14:08 71.8 71.8 67.6 11:19:09 67.6 67.6 79.4 11:23:39 79.4 79.4
68.8 11:14:09 68.8 68.8 73.9 11:19:10 73.9 73.9 82.2 11:23:40 82.2 82.2
71.4 11:14:10 71.4 71.4 66.9 11:19:11 66.9 66.9 72.9 11:23:41 72.9 72.9
70.4 11:14:11 70.4 70.4 66.3 11:19:12 66.3 66.3 80.4 11:23:42 80.4 80.4
64.4 11:14:12 64.4 64.4 62.3 11:19:13 62.3 62.3 79.8 11:23:43 79.8 79.8
61.2 11:14:13 61.2 61.2 64.1 11:19:14 64.1 64.1 78.3 11:23:44 78.3 78.3
58.9 11:14:14 58.9 58.9 65.1 11:19:15 65.1 65.1 64.2 11:23:45 64.2 64.2
61.6 11:14:15 61.6 61.6 64.5 11:19:16 64.5 64.5 81.5 11:23:46 81.5 81.5
68.6 11:14:16 68.6 68.6 65.6 11:19:17 65.6 65.6 73.7 11:23:47 73.7 73.7
70.1 11:14:17 70.1 70.1 63.1 11:19:18 63.1 63.1 75.0 11:23:48 75.0 75.0
67.6 11:14:18 67.6 67.6 63.1 11:19:19 63.1 63.1 79.0 11:23:49 79.0 79.0
69.3 11:14:19 69.3 69.3 60.7 11:19:20 60.7 60.7 76.3 11:23:50 76.3 76.3
66.4 11:14:20 66.4 66.4 55.9 11:19:21 55.9 55.9 75.9 11:23:51 75.9 75.9
63.5 11:14:21 63.5 63.5 60.4 11:19:22 60.4 60.4 76.6 11:23:52 76.6 76.6
67.7 11:14:22 67.7 67.7 61.2 11:19:23 61.2 61.2 66.1 11:23:53 66.1 66.1
70.9 11:14:23 70.9 70.9 64.4 11:19:24 64.4 64.4 70.4 11:23:54 70.4 70.4
70.0 11:14:24 70.0 70.0 61.3 11:19:25 61.3 61.3 77.3 11:23:55 77.3 77.3
64.1 11:14:25 64.1 64.1 57.1 11:19:26 57.1 57.1 76.1 11:23:56 76.1 76.1
59.2 11:14:26 59.2 59.2 60.9 11:19:27 60.9 60.9 70.3 11:23:57 70.3 70.3
59.8 11:14:27 59.8 59.8 58.1 11:19:28 58.1 58.1 66.9 11:23:58 66.9 66.9
64.1 11:14:28 64.1 64.1 55.7 11:19:29 55.7 55.7 62.5 11:23:59 62.5 62.5
69.0 11:14:29 69.0 69.0 61.1 11:19:30 61.1 61.1 60.5 11:24:00 60.5 60.5
65.6 11:14:30 65.6 65.6 59.8 11:19:31 59.8 59.8 60.4 11:24:01 60.4 60.4
61.5 11:14:31 61.5 61.5 62.2 11:19:32 62.2 62.2 59.2 11:24:02 59.2 59.2
65.9 11:14:32 65.9 65.9 58.4 11:19:33 58.4 58.4 58.7 11:24:03 58.7 58.7
69.3 11:14:33 69.3 69.3 60.3 11:19:34 60.3 60.3 71.2 11:24:04 71.2 71.2
66.2 11:14:34 66.2 66.2 59.8 11:19:35 59.8 59.8 69.5 11:24:05 69.5 69.5
64.7 11:14:35 64.7 64.7 52.9 11:19:36 52.9 52.9 71.8 11:24:06 71.8 71.8
60.9 11:14:36 60.9 60.9 54.2 11:19:37 54.2 54.2 68.4 11:24:07 68.4 68.4
59.5 11:14:37 59.5 59.5 58.4 11:19:38 58.4 58.4 70.0 11:24:08 70.0 70.0
59.3 11:14:38 59.3 59.3 62.4 11:19:39 62.4 62.4 74.2 11:24:09 74.2 74.2
61.0 11:14:39 61.0 61.0 60.1 11:19:40 60.1 60.1 75.3 11:24:10 75.3 75.3
58.0 11:14:40 58.0 58.0 62.4 11:19:41 62.4 62.4 68.7 11:24:11 68.7 68.7
62.5 11:14:41 62.5 62.5 63.2 11:19:42 63.2 63.2 62.9 11:24:12 62.9 62.9
63.7 11:14:42 63.7 63.7 53.9 11:19:43 53.9 53.9 70.1 11:24:13 70.1 70.1
71.3 11:14:43 71.3 71.3 55.2 11:19:44 55.2 55.2 68.9 11:24:14 68.9 68.9
68.3 11:14:44 68.3 68.3 62.4 11:19:45 62.4 62.4 63.0 11:24:15 63.0 63.0
62.9 11:14:45 62.9 62.9 57.8 11:19:46 57.8 57.8 63.4 11:24:16 63.4 63.4
67.4 11:14:46 67.4 67.4 59.2 11:19:47 59.2 59.2 62.1 11:24:17 62.1 62.1
72.2 11:14:47 72.2 72.2 60.5 11:19:48 60.5 60.5 67.4 11:24:18 67.4 67.4
67.8 11:14:48 67.8 67.8 57.4 11:19:49 57.4 57.4 64.7 11:24:19 64.7 64.7
64.1 11:14:49 64.1 64.1 50.7 11:19:50 50.7 50.7 64.1 11:24:20 64.1 64.1
65.9 11:14:50 65.9 65.9 49.8 11:19:51 49.8 49.8 62.1 11:24:21 62.1 62.1
66.3 11:14:51 66.3 66.3 51.1 11:19:52 51.1 51.1 68.4 11:24:22 68.4 68.4
63.6 11:14:52 63.6 63.6 49.5 11:19:53 49.5 49.5 64.7 11:24:23 64.7 64.7
61.1 11:14:53 61.1 61.1 51.3 11:19:54 51.3 51.3 66.7 11:24:24 66.7 66.7
57.0 11:14:54 57.0 57.0 54.5 11:19:55 54.5 54.5 74.0 11:24:25 74.0 74.0
60.3 11:14:55 60.3 60.3 59.8 11:19:56 59.8 59.8 74.3 11:24:26 74.3 74.3
54.1 11:14:56 54.1 54.1 70.3 11:19:57 70.3 70.3 74.7 11:24:27 74.7 74.7
57.9 11:14:57 57.9 57.9 65.5 11:19:58 65.5 65.5 72.8 11:24:28 72.8 72.8
55.7 11:14:58 55.7 55.7 65.6 11:19:59 65.6 65.6 69.9 11:24:29 69.9 69.9
55.6 11:14:59 55.6 55.6 65.2 11:20:00 65.2 65.2 69.8 11:24:30 69.8 69.8
56.2 11:15:00 56.2 56.2 63.5 11:20:01 63.5 63.5 69.1 11:24:31 69.1 69.1
55.6 11:15:01 55.6 55.6 55.7 11:20:02 55.7 55.7 68.0 11:24:32 68.0 68.0
56.4 11:15:02 56.4 56.4 50.8 11:20:03 50.8 50.8 66.7 11:24:33 66.7 66.7
60.6 11:15:03 60.6 60.6 50.1 11:20:04 50.1 50.1 64.8 11:24:34 64.8 64.8
71.7 11:15:04 71.7 71.7 50.2 11:20:05 50.2 50.2 65.7 11:24:35 65.7 65.7
73.2 11:15:05 73.2 73.2 55.9 11:20:06 55.9 55.9 66.9 11:24:36 66.9 66.9
63.3 11:15:06 63.3 63.3 49.0 11:20:07 49.0 49.0 69.9 11:24:37 69.9 69.9
61.9 11:15:07 61.9 61.9 62.0 11:20:08 62.0 62.0 71.0 11:24:38 71.0 71.0
71.6 11:15:08 71.6 71.6 53.1 11:20:09 53.1 53.1 72.0 11:24:39 72.0 72.0
68.8 11:15:09 68.8 68.8 77.8 11:20:10 77.8 77.8 73.3 11:24:40 73.3 73.3
Site 2 - Near Southeast Corner of Carwash Structure
Site 2 - Near Southeast Corner of Carwash Structure
Site 1 - Near Northeast Corner of Project Site
Site 1 - Near Northeast Corner of Project Site
Site 3 - Near Northwest Corner of Project Site
Site 3 - Near Northwest Corner of Project Site
May 21, 2025 May 21, 2025 May 21, 2025
Record Num =Record Num =Record Num =
Sampling Time = 1 sec Sampling Time = 1 sec Sampling Time = 1 sec
11:21:57 AM11:17:27 AM
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Appendix C
APPENDIX C
RCNM Model Construction Noise Calculations
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Demolition
---- Receptor #1 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to East Commercial 68.8 66.7 62.6
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Concrete Saw No 20 89.6 130 5
Dozer No 40 81.7 130 5
Backhoe No 40 77.6 130 5
Front End Loader No 40 79.1 130 5
Tractor No 40 84 130 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Concrete Saw 76.3 69.3 N/A N/A N/A N/A
Dozer 68.4 64.4 N/A N/A N/A N/A
Backhoe 64.3 60.3 N/A N/A N/A N/A
Front End Loader 65.8 61.8 N/A N/A N/A N/A
Tractor 70.7 66.7 N/A N/A N/A N/A
Total 76 73 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Demolition
---- Receptor #2 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Homes to South Residential 65 65 63.1
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Concrete Saw No 20 89.6 100 5
Dozer No 40 81.7 100 5
Backhoe No 40 77.6 100 5
Front End Loader No 40 79.1 100 5
Tractor No 40 84 100 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Concrete Saw 78.6 72 N/A N/A N/A N/A
Dozer 70.6 66.7 N/A N/A N/A N/A
Backhoe 66.5 62.6 N/A N/A N/A N/A
Front End Loader 68.1 64.1 N/A N/A N/A N/A
Tractor 73.0 69.0 N/A N/A N/A N/A
Total 79 75 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Demolition
---- Receptor #3 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to West Commercial 69.1 68.5 66.5
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Concrete Saw No 20 89.6 180 5
Dozer No 40 81.7 180 5
Backhoe No 40 77.6 180 5
Front End Loader No 40 79.1 180 5
Tractor No 40 84 180 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Concrete Saw 73.5 66.5 N/A N/A N/A N/A
Dozer 65.5 61.6 N/A N/A N/A N/A
Backhoe 61.4 57.5 N/A N/A N/A N/A
Front End Loader 63.0 59.0 N/A N/A N/A N/A
Tractor 67.9 63.9 N/A N/A N/A N/A
Total 74 70 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Grading
---- Receptor #1 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to East Commercial 68.8 66.7 62.6
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Grader No 40 85 130 5
Dozer No 40 81.7 130 5
Backhoe No 40 77.6 130 5
Tractor No 40 84 130 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Grader 71.7 67.7 N/A N/A N/A N/A
Dozer 68.4 64.4 N/A N/A N/A N/A
Backhoe 64.3 60.3 N/A N/A N/A N/A
Tractor 70.7 66.7 N/A N/A N/A N/A
Total 72 72 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Grading
---- Receptor #2 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Homes to South Residential 65.3 64.5 63.1
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Grader No 40 85 100 5
Dozer No 40 81.7 100 5
Backhoe No 40 77.6 100 5
Tractor No 40 84 100 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Grader 74.0 70 N/A N/A N/A N/A
Dozer 70.6 66.7 N/A N/A N/A N/A
Backhoe 66.5 62.6 N/A N/A N/A N/A
Tractor 73.0 69.0 N/A N/A N/A N/A
Total 74 74 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Grading
---- Receptor #3 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to West Commercial 69.1 68.5 66.5
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Grader No 40 85 180 5
Dozer No 40 81.7 180 5
Backhoe No 40 77.6 180 5
Tractor No 40 84 180 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Grader 68.9 64.9 N/A N/A N/A N/A
Dozer 65.5 61.6 N/A N/A N/A N/A
Backhoe 61.4 57.5 N/A N/A N/A N/A
Tractor 67.9 63.9 N/A N/A N/A N/A
Total 69 69 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Building Construction
---- Receptor #1 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to East Commercial 68.8 66.7 62.6
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Crane No 16 80.6 130 5
Gradall No 40 83.4 130 5
Generator No 50 80.6 130 5
Tractor No 40 84 130 5
Welder / Torch No 40 74 130 5
Welder / Torch No 40 74 130 5
Welder / Torch No 40 74 130 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Crane 67.3 59.3 N/A N/A N/A N/A
Gradall 70.1 66.1 N/A N/A N/A N/A
Generator 67.3 64.3 N/A N/A N/A N/A
Tractor 70.7 66.7 N/A N/A N/A N/A
Welder / Torch 60.7 56.7 N/A N/A N/A N/A
Welder / Torch 60.7 56.7 N/A N/A N/A N/A
Welder / Torch 60.7 56.7 N/A N/A N/A N/A
Total 71 71 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Building Construction
---- Receptor #2 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Homes to South Residential 65.3 64.5 63.1
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Crane No 16 80.6 100 5
Gradall No 40 83.4 100 5
Generator No 50 80.6 100 5
Tractor No 40 84 100 5
Welder / Torch No 40 74 100 5
Welder / Torch No 40 74 100 5
Welder / Torch No 40 74 100 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Crane 69.5 61.6 N/A N/A N/A N/A
Gradall 72.4 68.4 N/A N/A N/A N/A
Generator 69.6 66.6 N/A N/A N/A N/A
Tractor 73.0 69.0 N/A N/A N/A N/A
Welder / Torch 63.0 59.0 N/A N/A N/A N/A
Welder / Torch 63.0 59.0 N/A N/A N/A N/A
Welder / Torch 63.0 59.0 N/A N/A N/A N/A
Total 73 74 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Building Construction
---- Receptor #3 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to West Commercial 69.1 68.5 66.5
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Crane No 16 80.6 180 5
Gradall No 40 83.4 180 5
Generator No 50 80.6 180 5
Tractor No 40 84 180 5
Welder / Torch No 40 74 180 5
Welder / Torch No 40 74 180 5
Welder / Torch No 40 74 180 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Crane 64.4 56.5 N/A N/A N/A N/A
Gradall 67.3 63.3 N/A N/A N/A N/A
Generator 64.5 61.5 N/A N/A N/A N/A
Tractor 67.9 63.9 N/A N/A N/A N/A
Welder / Torch 57.9 53.9 N/A N/A N/A N/A
Welder / Torch 57.9 53.9 N/A N/A N/A N/A
Welder / Torch 57.9 53.9 N/A N/A N/A N/A
Total 68 69 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Paving
---- Receptor #1 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to East Commercial 68.8 66.7 62.6
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Concrete Saw No 20 89.6 130 5
Dozer No 40 81.7 130 5
Backhoe No 40 77.6 130 5
Front End Loader No 40 79.1 130 5
Tractor No 40 84 130 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Concrete Saw 76.3 69.3 N/A N/A N/A N/A
Dozer 68.4 64.4 N/A N/A N/A N/A
Backhoe 64.3 60.3 N/A N/A N/A N/A
Front End Loader 65.8 61.8 N/A N/A N/A N/A
Tractor 70.7 66.7 N/A N/A N/A N/A
Total 76 73 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Paving
---- Receptor #2 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Homes to South Residential 65.3 64.5 63.1
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Concrete Saw No 20.0 89.6 100 5
Dozer No 40 81.7 100 5
Backhoe No 40 77.6 100 5
Front End Loader No 40 79.1 100 5
Tractor No 40 84 100 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Concrete Saw 78.6 71.6 N/A N/A N/A N/A
Dozer 70.6 66.7 N/A N/A N/A N/A
Backhoe 66.5 62.6 N/A N/A N/A N/A
Front End Loader 68.1 64.1 N/A N/A N/A N/A
Tractor 73.0 69.0 N/A N/A N/A N/A
Total 79 75 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Paving
---- Receptor #3 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to West Commercial 69.1 68.5 66.5
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Concrete Saw No 20 89.6 180 5
Dozer No 40 81.7 180 5
Backhoe No 40 77.6 180 5
Front End Loader No 40 79.1 180 5
Tractor No 40 84 180 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Concrete Saw 73.5 66.5 N/A N/A N/A N/A
Dozer 65.5 61.6 N/A N/A N/A N/A
Backhoe 61.4 57.5 N/A N/A N/A N/A
Front End Loader 63.0 59.0 N/A N/A N/A N/A
Tractor 67.9 63.9 N/A N/A N/A N/A
Total 74 70 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Painting
---- Receptor #1 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to East Commercial 68.8 66.7 62.6
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Compressor (air)No 40 77.7 130 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Compressor (air)64.4 60.4 N/A N/A N/A N/A
Total 64 60 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Homes to South Residential 65.3 64.5 63.1
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Compressor (air)No 40 77.7 100 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Compressor (air)66.6 62.7 N/A N/A N/A N/A
Total 67 63 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:12/8/2025
Case Description:Sun Day Carwash - Painting
---- Receptor #3 ----
Baselines (dBA)
Description Land Use Daytime Evening Night
Commercial Building to West Commercial 69.1 68.5 66.5
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%)(dBA)(dBA)(feet)(dBA)
Compressor (air)No 40 77.7 180 5
Results
Calculated (dBA)Noise Limits (dBA)
Day Evening
Equipment *Lmax Leq Lmax Leq Lmax Leq
Compressor (air)61.5 57.6 N/A N/A N/A N/A
Total 62 58 N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Appendix D
APPENDIX D
FHWA Model Traffic Noise Calculations Printouts
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:
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f
V
a
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Av
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2
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B
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:
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d
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:
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d
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:
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To
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l
:
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5
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6
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66
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d
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:
30
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d
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Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Appendix E
APPENDIX E
Operational Reference Noise Measurement Printouts
General Information
Serial Number 02509
Model 831
Firmware Version 2.314
Filename 831_Data.006
User GT
Job Description Torrance Fast5Xpress Carwash
Location On Side of Carwash Entrance, 48 feet from Entrance Door
Measurement Description
Start Time Thursday, 2019 February 07 12:39:20
Stop Time Thursday, 2019 February 07 12:49:20
Duration 00:10:00.0
Run Time 00:10:00.0
Pause 00:00:00.0
Pre Calibration Thursday, 2019 February 07 12:06:19
Post Calibration None
Calibration Deviation ---
Note
68 F, 30.15 in Hg, 30% Hu, no wind, clear sky
Overall Data
LAeq 61.5 dB
LASmax 2019 Feb 07 12:44:46 77.9 dB
LApeak (max) 2019 Feb 07 12:44:46 89.8 dB
LASmin 2019 Feb 07 12:39:53 52.8 dB
LCeq 74.6 dB
LAeq 61.5 dB
LCeq - LAeq 13.2 dB
LAIeq 62.9 dB
LAeq 61.5 dB
LAIeq - LAeq 1.4 dB
Ldn 61.5 dB
LDay 07:00-22:00 61.5 dB
LNight 22:00-07:00 --- dB
Lden 61.5 dB
LDay 07:00-19:00 61.5 dB
LEvening 19:00-22:00 --- dB
LNight 22:00-07:00 --- dB
LAE 89.2 dB
# Overloads 0
Overload Duration 0.0 s
# OBA Overloads 0
OBA Overload Duration 0.0 s
Statistics
LAS5.00 64.8 dBA
LAS10.00 63.6 dBA
LAS33.30 61.1 dBA
LAS50.00 59.7 dBA
LAS66.60 57.3 dBA
LAS90.00 54.3 dBA
LAS > 65.0 dB (Exceedence Counts / Duration) 8 / 40.6 s
LAS > 85.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 135.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 137.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 140.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
Settings
RMS Weight A Weighting
Peak Weight A Weighting
Detector Slow
Preamp PRM831
Integration Method Linear
OBA Range Low
OBA Bandwidth 1/1 and 1/3
OBA Freq. Weighting Z Weighting
OBA Max Spectrum Bin Max
Gain +0 dB
Under Range Limit 26.0 dB
Under Range Peak 75.3 dB
Noise Floor 16.8 dB
Overload 142.8 dB
1/1 Spectra
Freq. (Hz): 8.0 16.0 31.5 63.0 125 250 500 1k 2k 4k 8k 16k
LZeq 60.2 65.5 72.0 71.7 66.7 63.1 59.6 55.7 51.2 44.2 37.5 32.0
LZSmax 79.0 72.1 86.7 84.7 83.5 82.4 78.4 66.2 63.2 56.1 52.8 53.6
LZSmin 51.8 57.5 63.8 64.4 59.5 53.9 48.7 45.8 41.1 33.0 30.0 24.0
1/3 Spectra
Freq. (Hz): 6.3 8.0 10.0 12.5 16.0 20.0 25.0 31.5 40.0 50.0 63.0 80.0
LZeq 55.3 55.0 55.9 59.1 60.1 62.4 65.4 67.3 68.4 66.9 67.6 66.0
LZSmax 74.9 74.1 68.8 68.5 67.9 70.5 74.6 82.7 85.6 85.0 76.1 83.7
LZSmin 41.5 45.0 46.8 49.6 51.6 54.3 58.7 57.9 56.7 48.5 60.8 53.0
Freq. (Hz): 100 125 160 200 250 315 400 500 630 800 1k 1.25k
LZeq 62.6 62.3 60.3 57.5 60.0 56.6 56.9 54.0 52.2 51.7 51.2 49.5
LZSmax 81.9 79.7 78.2 68.4 81.4 74.9 76.8 72.0 66.3 63.2 61.4 60.9
LZSmin 52.0 54.8 40.2 52.1 48.4 46.6 43.7 43.3 42.9 43.1 41.4 37.6
Freq. (Hz): 1.6k 2k 2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
LZeq 47.7 46.2 44.8 41.5 38.9 36.2 34.0 33.4 29.6 26.1 30.3 19.8
LZSmax 59.8 58.4 56.9 52.8 50.5 50.1 46.8 52.7 44.4 36.7 53.6 33.8
LZSmin 37.5 35.0 34.8 29.8 27.0 25.6 25.4 26.2 23.5 20.9 19.0 15.7
Calibration History
Preamp Date dB re. 1V/Pa
PRM831 07 Feb 2019 12:06:19 -25.3
PRM831 07 Feb 2019 11:34:23 -25.9
PRM831 20 Dec 2018 10:51:31 -26.0
PRM831 17 Dec 2018 14:56:06 -26.1
PRM831 04 Dec 2018 09:35:01 -25.5
PRM831 16 Nov 2018 13:58:18 -25.8
PRM831 24 Oct 2018 13:08:44 -26.1
PRM831 12 Oct 2018 09:55:27 -25.9
PRM831 26 Sep 2018 15:49:25 -26.2
PRM831 21 Sep 2018 08:51:56 -25.6
PRM831 05 Sep 2018 11:51:21 -25.9
General Information
Serial Number 02509
Model 831
Firmware Version 2.314
Filename 831_Data.004
User GT
Job Description Torrance Fast5Xpress
Location Middle of Carwash, 30 feet from Side Aligned with Air Vent
Measurement Description
Start Time Thursday, 2019 February 07 12:18:19
Stop Time Thursday, 2019 February 07 12:28:19
Duration 00:10:00.0
Run Time 00:10:00.0
Pause 00:00:00.0
Pre Calibration Thursday, 2019 February 07 12:06:19
Post Calibration None
Calibration Deviation ---
Note
68 F, 30.17 in Hg, 30% Hu, no wind, clear sky
Overall Data
LAeq 64.5 dB
LASmax 2019 Feb 07 12:18:19 70.3 dB
LApeak (max) 2019 Feb 07 12:19:44 85.7 dB
LASmin 2019 Feb 07 12:27:28 59.5 dB
LCeq 74.9 dB
LAeq 64.5 dB
LCeq - LAeq 10.4 dB
LAIeq 65.4 dB
LAeq 64.5 dB
LAIeq - LAeq 0.9 dB
Ldn 64.5 dB
LDay 07:00-22:00 64.5 dB
LNight 22:00-07:00 --- dB
Lden 64.5 dB
LDay 07:00-19:00 64.5 dB
LEvening 19:00-22:00 --- dB
LNight 22:00-07:00 --- dB
LAE 92.3 dB
# Overloads 0
Overload Duration 0.0 s
# OBA Overloads 0
OBA Overload Duration 0.0 s
Statistics
LAS5.00 67.4 dBA
LAS10.00 67.1 dBA
LAS33.30 64.7 dBA
LAS50.00 63.6 dBA
LAS66.60 62.7 dBA
LAS90.00 61.3 dBA
LAS > 65.0 dB (Exceedence Counts / Duration) 10 / 276.2 s
LAS > 85.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 135.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 137.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 140.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
Settings
RMS Weight A Weighting
Peak Weight A Weighting
Detector Slow
Preamp PRM831
Integration Method Linear
OBA Range Low
OBA Bandwidth 1/1 and 1/3
OBA Freq. Weighting Z Weighting
OBA Max Spectrum Bin Max
Gain +0 dB
Under Range Limit 26.0 dB
Under Range Peak 75.3 dB
Noise Floor 16.8 dB
Overload 142.8 dB
1/1 Spectra
Freq. (Hz): 8.0 16.0 31.5 63.0 125 250 500 1k 2k 4k 8k 16k
LZeq 60.9 65.0 71.1 72.2 66.6 64.1 62.0 60.3 53.7 47.6 45.9 44.6
LZSmax 77.2 74.8 82.2 79.9 74.7 69.5 66.0 66.2 65.5 59.0 67.3 69.2
LZSmin 46.2 58.9 65.4 68.7 59.5 59.1 56.6 52.0 46.5 38.4 32.5 19.8
1/3 Spectra
Freq. (Hz): 6.3 8.0 10.0 12.5 16.0 20.0 25.0 31.5 40.0 50.0 63.0 80.0
LZeq 54.3 55.5 57.8 58.3 60.5 61.4 67.4 64.2 67.1 65.3 69.9 65.5
LZSmax 71.8 72.2 72.6 68.9 69.8 72.1 77.7 73.5 74.8 78.8 78.7 72.0
LZSmin 43.4 46.0 47.1 50.3 51.3 54.2 60.1 59.0 59.8 59.4 64.3 60.1
Freq. (Hz): 100 125 160 200 250 315 400 500 630 800 1k 1.25k
LZeq 62.3 62.6 60.0 57.9 60.5 59.2 56.3 54.7 59.3 56.4 56.3 53.0
LZSmax 73.2 73.2 64.6 66.2 67.5 64.3 61.2 60.9 64.6 61.9 63.2 59.4
LZSmin 49.4 51.1 55.6 52.4 53.0 54.0 48.0 47.6 50.8 46.7 40.0 45.5
Freq. (Hz): 1.6k 2k 2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
LZeq 50.2 48.2 47.8 44.2 42.6 40.3 44.7 36.6 40.0 37.7 43.5 27.8
LZSmax 56.0 54.1 55.0 51.8 51.0 54.4 68.4 49.1 63.6 64.3 68.8 45.8
LZSmin 43.6 40.6 40.8 35.4 32.8 31.3 29.0 28.2 21.9 15.1 14.8 11.8
Calibration History
Preamp Date dB re. 1V/Pa
PRM831 07 Feb 2019 12:06:19 -25.3
PRM831 07 Feb 2019 11:34:23 -25.9
PRM831 20 Dec 2018 10:51:31 -26.0
PRM831 17 Dec 2018 14:56:06 -26.1
PRM831 04 Dec 2018 09:35:01 -25.5
PRM831 16 Nov 2018 13:58:18 -25.8
PRM831 24 Oct 2018 13:08:44 -26.1
PRM831 12 Oct 2018 09:55:27 -25.9
PRM831 26 Sep 2018 15:49:25 -26.2
PRM831 21 Sep 2018 08:51:56 -25.6
PRM831 05 Sep 2018 11:51:21 -25.9
General Information
Serial Number 02509
Model 831
Firmware Version 2.314
Filename 831_Data.003
User GT
Job Description Torrance Fast5Xpress Carwash
Location On Side of Carwash Exit, 45 feet from Exit Door
Measurement Description
Start Time Thursday, 2019 February 07 12:07:35
Stop Time Thursday, 2019 February 07 12:17:35
Duration 00:10:00.0
Run Time 00:10:00.0
Pause 00:00:00.0
Pre Calibration Thursday, 2019 February 07 12:06:20
Post Calibration None
Calibration Deviation ---
Note
68 F, 30.17 in Hg, 33% Hu, no wind, clear sky
Overall Data
LAeq 66.6 dB
LASmax 2019 Feb 07 12:09:28 82.5 dB
LApeak (max) 2019 Feb 07 12:09:28 96.7 dB
LASmin 2019 Feb 07 12:08:19 58.2 dB
LCeq 79.7 dB
LAeq 66.6 dB
LCeq - LAeq 13.0 dB
LAIeq 67.6 dB
LAeq 66.6 dB
LAIeq - LAeq 0.9 dB
Ldn 66.6 dB
LDay 07:00-22:00 66.6 dB
LNight 22:00-07:00 --- dB
Lden 66.6 dB
LDay 07:00-19:00 66.6 dB
LEvening 19:00-22:00 --- dB
LNight 22:00-07:00 --- dB
LAE 94.4 dB
# Overloads 0
Overload Duration 0.0 s
# OBA Overloads 0
OBA Overload Duration 0.0 s
Statistics
LAS5.00 69.1 dBA
LAS10.00 68.1 dBA
LAS33.30 66.8 dBA
LAS50.00 65.4 dBA
LAS66.60 62.6 dBA
LAS90.00 60.3 dBA
LAS > 65.0 dB (Exceedence Counts / Duration) 9 / 341.5 s
LAS > 85.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 135.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 137.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 140.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
Settings
RMS Weight A Weighting
Peak Weight A Weighting
Detector Slow
Preamp PRM831
Integration Method Linear
OBA Range Low
OBA Bandwidth 1/1 and 1/3
OBA Freq. Weighting Z Weighting
OBA Max Spectrum Bin Max
Gain +0 dB
Under Range Limit 26.0 dB
Under Range Peak 75.3 dB
Noise Floor 16.8 dB
Overload 142.8 dB
1/1 Spectra
Freq. (Hz): 8.0 16.0 31.5 63.0 125 250 500 1k 2k 4k 8k 16k
LZeq 62.1 67.2 77.0 77.5 69.7 66.2 63.7 61.5 58.6 53.1 44.3 31.7
LZSmax 81.7 76.9 91.3 92.8 79.8 78.6 79.4 77.9 75.5 70.9 63.7 49.5
LZSmin 54.3 60.4 66.5 68.7 63.2 59.9 52.8 52.0 48.8 40.3 31.5 20.1
1/3 Spectra
Freq. (Hz): 6.3 8.0 10.0 12.5 16.0 20.0 25.0 31.5 40.0 50.0 63.0 80.0
LZeq 55.9 57.8 58.1 60.1 62.3 64.0 67.3 68.0 75.9 73.0 74.4 69.1
LZSmax 76.2 78.7 69.2 72.4 73.7 74.1 78.3 77.8 91.1 88.7 90.3 84.0
LZSmin 44.1 47.0 48.1 51.2 53.7 57.3 60.6 60.9 60.5 60.1 63.8 61.9
Freq. (Hz): 100 125 160 200 250 315 400 500 630 800 1k 1.25k
LZeq 65.5 65.0 64.0 62.9 60.8 59.8 59.7 58.7 58.2 57.6 56.6 55.9
LZSmax 78.2 75.8 73.4 74.7 74.8 73.3 74.8 75.2 74.4 73.8 73.0 72.9
LZSmin 57.6 56.4 58.9 56.9 53.0 53.0 48.4 46.5 47.6 48.9 46.5 44.9
Freq. (Hz): 1.6k 2k 2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
LZeq 54.5 53.5 53.4 50.5 47.7 44.8 42.3 38.6 33.2 28.7 27.7 21.1
LZSmax 70.7 71.0 70.1 68.2 65.8 63.0 62.2 58.1 49.6 45.1 48.6 39.0
LZSmin 44.0 41.0 43.4 36.8 33.6 33.2 27.0 27.0 24.4 16.7 15.6 10.2
Calibration History
Preamp Date dB re. 1V/Pa
PRM831 07 Feb 2019 12:06:19 -25.3
PRM831 07 Feb 2019 11:34:23 -25.9
PRM831 20 Dec 2018 10:51:31 -26.0
PRM831 17 Dec 2018 14:56:06 -26.1
PRM831 04 Dec 2018 09:35:01 -25.5
PRM831 16 Nov 2018 13:58:18 -25.8
PRM831 24 Oct 2018 13:08:44 -26.1
PRM831 12 Oct 2018 09:55:27 -25.9
PRM831 26 Sep 2018 15:49:25 -26.2
PRM831 21 Sep 2018 08:51:56 -25.6
PRM831 05 Sep 2018 11:51:21 -25.9
General Information
Serial Number 02509
Model 831
Firmware Version 2.314
Filename 831_Data.008
User GT
Job Description Torrance Fast5Xpress Carwash
Location 15 feet from Car Vacuum Stations
Measurement Description
Start Time Thursday, 2019 February 07 13:03:30
Stop Time Thursday, 2019 February 07 13:13:30
Duration 00:10:00.0
Run Time 00:10:00.0
Pause 00:00:00.0
Pre Calibration Thursday, 2019 February 07 12:06:19
Post Calibration None
Calibration Deviation ---
Note
69 F, 30.13 in Hg, 27% Hu, 2 mph wind, clear sky
Overall Data
LAeq 67.3 dB
LASmax 2019 Feb 07 13:09:13 73.1 dB
LApeak (max) 2019 Feb 07 13:08:11 86.5 dB
LASmin 2019 Feb 07 13:03:52 61.1 dB
LCeq 73.0 dB
LAeq 67.3 dB
LCeq - LAeq 5.7 dB
LAIeq 67.9 dB
LAeq 67.3 dB
LAIeq - LAeq 0.6 dB
Ldn 67.3 dB
LDay 07:00-22:00 67.3 dB
LNight 22:00-07:00 --- dB
Lden 67.3 dB
LDay 07:00-19:00 67.3 dB
LEvening 19:00-22:00 --- dB
LNight 22:00-07:00 --- dB
LAE 95.1 dB
# Overloads 0
Overload Duration 0.0 s
# OBA Overloads 0
OBA Overload Duration 0.0 s
Statistics
LAS5.00 69.8 dBA
LAS10.00 68.3 dBA
LAS33.30 67.2 dBA
LAS50.00 66.9 dBA
LAS66.60 66.7 dBA
LAS90.00 66.3 dBA
LAS > 65.0 dB (Exceedence Counts / Duration) 1 / 572.7 s
LAS > 85.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 135.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 137.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
LApeak > 140.0 dB (Exceedence Counts / Duration) 0 / 0.0 s
Settings
RMS Weight A Weighting
Peak Weight A Weighting
Detector Slow
Preamp PRM831
Integration Method Linear
OBA Range Low
OBA Bandwidth 1/1 and 1/3
OBA Freq. Weighting Z Weighting
OBA Max Spectrum Bin Max
Gain +0 dB
Under Range Limit 26.0 dB
Under Range Peak 75.3 dB
Noise Floor 16.8 dB
Overload 142.8 dB
1/1 Spectra
Freq. (Hz): 8.0 16.0 31.5 63.0 125 250 500 1k 2k 4k 8k 16k
LZeq 61.6 67.3 71.0 67.8 64.0 59.1 61.3 60.0 60.8 60.3 58.5 55.8
LZSmax 78.9 80.1 80.2 78.6 71.9 67.0 64.5 64.9 65.0 65.4 71.6 70.4
LZSmin 54.8 60.8 65.8 63.4 57.6 54.2 54.5 53.5 53.7 53.4 48.5 43.4
1/3 Spectra
Freq. (Hz): 6.3 8.0 10.0 12.5 16.0 20.0 25.0 31.5 40.0 50.0 63.0 80.0
LZeq 56.5 56.9 57.8 59.3 61.8 64.8 68.1 65.1 65.2 63.4 63.6 61.6
LZSmax 74.1 74.1 73.8 66.4 69.2 79.7 78.0 74.2 75.0 75.6 74.4 69.4
LZSmin 40.9 46.2 48.1 51.8 53.9 56.8 59.9 58.1 58.3 57.5 57.7 54.9
Freq. (Hz): 100 125 160 200 250 315 400 500 630 800 1k 1.25k
LZeq 59.7 60.1 57.5 54.9 53.6 54.4 55.8 58.8 53.6 57.8 53.6 52.6
LZSmax 69.6 70.9 69.8 67.2 64.5 60.2 60.9 62.2 57.9 61.8 60.3 59.8
LZSmin 53.2 52.6 49.8 48.2 47.3 50.4 49.2 51.1 40.0 50.0 48.4 49.0
Freq. (Hz): 1.6k 2k 2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
LZeq 52.5 56.2 57.8 57.4 54.9 53.6 53.4 54.1 53.8 52.4 51.4 48.0
LZSmax 59.4 60.4 62.2 61.1 60.2 61.3 65.5 67.5 67.8 66.4 66.4 63.6
LZSmin 48.1 48.0 50.0 50.4 47.9 46.7 44.8 44.0 41.8 40.2 38.7 35.3
Calibration History
Preamp Date dB re. 1V/Pa
PRM831 07 Feb 2019 12:06:19 -25.3
PRM831 07 Feb 2019 11:34:23 -25.9
PRM831 20 Dec 2018 10:51:31 -26.0
PRM831 17 Dec 2018 14:56:06 -26.1
PRM831 04 Dec 2018 09:35:01 -25.5
PRM831 16 Nov 2018 13:58:18 -25.8
PRM831 24 Oct 2018 13:08:44 -26.1
PRM831 12 Oct 2018 09:55:27 -25.9
PRM831 26 Sep 2018 15:49:25 -26.2
PRM831 21 Sep 2018 08:51:56 -25.6
PRM831 05 Sep 2018 11:51:21 -25.9
Sun Day Carwash at 9540 Valley Boulevard Project, Noise Impact Analysis
City of Rosemead
Appendix F
APPENDIX F
Operational Noise Barrier Calculations Printouts
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