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Apx I_H&H ReportAppendix | Hydrology & Hydraulics Report Kimley»Horn 2"? Submittal - Preliminary Design HYDROLOGY & HYDRAULICS Report Rosemead Condominiums 1515 Walnut Grove Avenue Rosemead, CA April 2025 OWNER: Lewis Acquisition Company, LLC A Delaware Limited Liability Company 1156 North Mountain Avenue Upland, California 91768 (909) 985-0971 ENGINEER:Kimley»Horn Michael Lepore, PE 1100 W Town and Country Road, Suite 700 Orange, CA 92868 (714) 939-1030 KHA Project No.: 194053016 This Drainage Report has been prepared by Kimley-Horn and Associates, Inc. under the direct supervision of the following Registered Civil engineer. The undersigned attests to the technical data contained in this study, and to the qualifications of technical specialists providing engineering computations upon which the recommendations and conclusions are based. XXXX. XX Michael Lepore, CA PE #90239 Date TABLE OF CONTENTS 1 PROJECT BACKGROUND......cociciiiiiiieiirieeerste reentrant nesses eases eee1-2 2 HYDROLOGY CALCULATIONS... eee eee 2-3 3 TECHNICAL FEASIBILITY SCREENING .......ccciiii eee 3-4 4 CONCLUSION.....ii eee eee eater eerste esr een e essen nanree nn 4-4 Rosemead Condos | Hydrology & Hydraulics Report BN Attachment 1: Hydrology Calculations e LA County Hydrology Calculator — 85" — Percentile Rainfall Depth e LA County Hydrology Calculator — 25-Year Rainfall Depth e LA County HydroCalc Calculator Attachment 2: Storm Drain Sizing Calculations oe Contech CMP Detention System Attachment 3: Site Plans Attachment 4: Geotechnical Investigation References County of Los Angeles Department of Public Works Low Impact Development Standard Manual, February 2014. Rosemead Condos | Hydrology & Hydraulics Report 1 PROJECT BACKGROUND The applicant proposes to construct condominium development (“Project”) on an existing, currently developed 9-acre industrial/commercial site. The Project includes proposed condominium buildings (approx. 25 dwellings units per acre), garages, sidewalk, driveways, sanitary sewer, storm drain, proposed new asphalt pavement, and landscape improvements. RUSH ST RUSH ST aN A S> z 9 SITE a | g7. ; YARROW ST 7 VICINITY MAP &"OT0 WAL Figure 1: Vicinity Map — Not to Scale Project Description and Purpose The Project sits within APN No. 5279-027-001 — a portion of Lot 23, Tract No. 701, M.B. 16/110-11 and is bordered by Walnut Grove Avenue to the east, the Lewis R. Lancaster Research Library to the south, residential single-family homes to the west, and industrial commercial to the north. The total property area is approximately 9.27 acres. The Site is currently developed as a nearly 100% impervious office site with surface parking. The proposed development consists of XXX proposed for-sale residential condominium units with associated amenity areas, drive aisles, walkways, and landscaping. Existing site (pre-development) conditions In the existing condition, the site was originally used as an office site. The site is generally flat. The existing site runoff is generally contained within the site. There is an existing LA County Road Drain 163 storm drain that runs from north of south in Walnut Grove Avenue and County Project 1226 Storm Drain that runs from west to east within a storm drain easement along the south side of the property. Road Drain 163 discharges into Project 1226 downstream of the site in Walnut Grove Avenue. Project 1226 discharges to the Rio Hondo flood control channel, which in turn flows through the Whitter Narrows Reservoir and spreading downstream ultimately confluencing with the Los Angeles River downstream of the Reservoir. Rosemead Condos | Hydrology & Hydraulics Report Several existing private catch basins are scattered across the existing site. Approximately half the site, generally the northerly portion, drains to an existing private underground storm drain system that connects to the County Road Drain at approximate station 134+50 (mid-site). The southern approximately half of the site drains to a separate private underground storm drain system that connects to the County Project 1226 storm drain. Since the existing private connection to the County storm drain system will be maintained and connected to by the proposed storm drain systems, a County storm drain connection permit is not anticipated. Both existing connections are 24-inch diameter pipes. There is no on-site run-on or run-off that is apparent in the existing condition. Proposed site (post-development) conditions The drainage tributary area for hydrology and hydraulic analysis is approximately 9.27 acres. The tributary area is broken up into two sub-areas: A-1 and B-1. See Table 1 below for a summary of the pervious/impervious areas of the sub-areas. Stormwater for the site will primarily sheet flow onsite and be collected by curb and gutter. These flows are intercepted by 24” x 24” Jensen precast grated drop inlets or Jensen precast curb inlets. The stormwater in each tributary area will be conveyed via 24” RCP storm drain to a hydrodynamic separator unit for pretreatment before outfalling into an underground Contech CMP Detention System. This chamber will then have a controlled outlet condition to a Contech MWS-L-8-8-V Modular Wetland System (MWS) unit. This combination of pre-treatment, detention storage, and water quality treatment will be present in each Tributary Area. Area A-1 will tie into the existing storm drain the connects to Road Drain 163 and Area B-1 will tie into the existing storm drain lateral along the southern property line that connects to Project 1226. Table 1 — Summary of Project Areas Tributary Area ID Tributary Area (AC)Tributary Impervious Tributary Pervious Area (AC) Area (AC) A-1 4.59 3.90 0.69 B-1 4.68 3.98 0.70 2 HYDROLOGY CALCULATIONS The Project proposes a storm drain collection and conveyance system comprised of 24” RCP pipe throughout the site. Each tributary area will collect runoff via surface drains, convey this flow via this 24” RCP lateral system, enter a hydrodynamic separator unit for pre-treatment, outfall into an underground Contech CMP Detention system. This detention system will be sized for the 85"-percentile rainfall depth, per LACPW requirements. Pipe sizes are designed to convey the 25-year rainfall depth. Calculations for detention volumes and peak runoff values utilized Los Angeles County Public Works HydroCalc software. The proposed BMP design utilized an 85" percentile rainfall depth of 0.90 inches, as it exceeds the 0.75-inch rain event minimum. Tributary area A-1 has a total area of 4.59 acres with a project imperviousness of approximately 85%. The 85™ percentile event for this area generates 17,400 cu. ft. of volume to detain onsite. This value includes a biofiltration penalty factor of 1.5 to the total volume since that is the chosen method for water quality treatment. The 25-year peak flow for this area is 10.22 cfs. This Rosemead Condos | Hydrology & Hydraulics Report detained rainfall volume will gravity drain to a biofiltration modular wetland system prior to connect to the existing storm drain main line in Walnut Grove Avenue. Tributary area B-1 has a total area of 4.68 acres with a project imperviousness of approximately 85%. The 85" percentile event for this area generates 17,750 cu.ft. of volume to detain onsite. This value includes a biofiltration penalty factor of 1.5 to the total volume since that is the chosen method for water quality treatment. The 25-year rainfall depth peak flow for this area is 9.83 cfs. An existing analysis of the site hydrology using HydroCalc and as-built plans for the existing site. The proposed drainage system matches existing flow rates generated from the site. Existing and Proposed HydroCalc results and site calculations can be seen in Attachment 1. 3 TECHNICAL FEASIBILITY SCREENING The Project has limited horizontal space for large scale underground detention systems, as well as limited elevation fall to design a drainage system that has the capability to drain via gravity to the existing storm drain main line located in Walnut Grove Avenue. The 25-year max flow rate produced by this tributary area is 10.217 cfs. This combination of flows still leaves capacity within the proposed 24” RCP line. Therefore, it is assumed the proposed storm drain system has enough capacity to convey this existing offsite flow. See Attachment 2 for model output of this data. 4 CONCLUSION The proposed storm drain system for the Project is a hydrodynamic separator unit for pre-treatment, Contech CMP Detention System for detention, and a Contech MWS-L-8-8-V MWS unit for biofiltration water quality treatment. The entire system operates via gravity flowing and ties into existing storm drain infrastructure located in Walnut Grove Avenue at rates less than existing. The project area is split into two tributary areas, each with its own respective storm drain system as noted previously in this section. Tributary area A-1 has an 85" percentile design storm volume of 17,400 cu. ft. and a 25-year rainfall depth event peak flow of 10.22 cfs. Tributary B-1 has an 85™ percentile design storm volume of 17,750 cu. ft. and a 25- year rainfall depth even peak flow of 9.83 cfs. See Attachment 2 for storm drain sizing calculations. The Project will mitigate the required design storm volumes based on the storage volume provided by the two Contech CMP Detention System. Table 2 below provides a summary of these results. Table 2 — Tributary Area Detention Volume Summary Table . LID BMP Tributary . .Tributary Area Area (AC) Required Volume (CF) | Provided Volume (CF) A-1 4.59 17,400 17,558 B-1 4.68 17,750 17,785 Rosemead Condos | Hydrology & Hydraulics Report ATTACHMENT 1 HYDROLOGY CALCULATIONS Rosemead Condos | Hydrology & Hydraulics Report Peak Flow Hydrologic Analysis File location: K/ORA_LDEV/194053016 - Rosemead Condos/Reports/H&H/Calculations/Hydrocalc/Rosemead - A-1.pdf Version: HydroCalc 1.0.3 Input Parameters Project Name Rosemead Subarea ID A-1 (EXISTING)Area (ac) 4.93Flow Path Length (ft) 626.0Flow Path Slope (vft/hft) 0.012 50-yr Rainfall Depth (in) 6.0Percent Impervious 0.9Soil Type 6Design Storm Frequency 25-yr Fire Factor 0LID False Output Results Modeled (25-yr) Rainfall Depth (in) 5.268Peak Intensity (in/hr) 2.5201 Undeveloped Runoff Coefficient (Cu) 0.7886Developed Runoff Coefficient (Cd) 0.8889Time of Concentration (min) 8.0Clear Peak Flow Rate (cfs) 11.0431 Burned Peak Flow Rate (cfs) 11.043124-Hr Clear Runoff Volume (ac-ft) 1.781424-Hr Clear Runoff Volume (cu-ft) 77597.2879 12 Hydrograph (Rosemead: A-1) 10} Fl o w {c f s ) [o . ] Time (minutes) 1000 1200 1400 1600 Peak Flow Hydrologic Analysis File location: K/ORA_LDEV/194053016 - Rosemead Condos/Reports/H&H/Calculations/Hydrocalc/Rosemead - B-1.pdf Version: HydroCalc 1.0.3 Input Parameters Project Name Rosemead Subarea ID B-1 (EXISTING)Area (ac) 4.34Flow Path Length (ft) 294.0Flow Path Slope (vft/hft) 0.0550-yr Rainfall Depth (in) 6.0Percent Impervious 0.9Soil Type 6Design Storm Frequency 25-yr Fire Factor 0LID False Output Results Modeled (25-yr) Rainfall Depth (in) 5.268Peak Intensity (in/hr) 3.143Undeveloped Runoff Coefficient (Cu) 0.8323Developed Runoff Coefficient (Cd) 0.8932 Time of Concentration (min) 5.0Clear Peak Flow Rate (cfs) 12.1844 Burned Peak Flow Rate (cfs) 12.184424-Hr Clear Runoff Volume (ac-ft) 1.568324-Hr Clear Runoff Volume (cu-ft) 68317.2471 14 Hydrograph (Rosemead: B-1) 12} 10} Fl o w (c f s ) Time (minutes) 1000 1200 1400 1600 Peak Flow Hydrologic Analysis File location: K/ORA_LDEV/194053016 - Rosemead Condos/Reports/H&H/Calculations/Hydrocalc/Rosemead Condos Report Proposed Version: HydroCalc 1.0.3 Input Parameters Project Name Subarea ID Rosemead Condos A-1Area (ac) 4.59Flow Path Length (ft) 543.0Flow Path Slope (vft/hft) 0.00885th Percentile Rainfall Depth (in) 0.9Percent Impervious 0.85Soil Type 6Design Storm Frequency 85th percentile storm Fire Factor 0LID True Output Results Modeled (85th percentile storm) Rainfall Depth (in) 0.9Peak Intensity (in/hr) 0.2313Undeveloped Runoff Coefficient (Cu) 0.1Developed Runoff Coefficient (Cd) 0.78Time of Concentration (min) 30.0Clear Peak Flow Rate (cfs) 0.8282Burned Peak Flow Rate (cfs) 0.828224-Hr Clear Runoff Volume (ac-ft) 0.266324-Hr Clear Runoff Volume (cu-ft) 11599.9812 Biofiltration Factor Runoff Volume 17,400 09 : oa} O07} oon T Fl o w (c f s ) o=T 02} 0.1} 0.0 / Hydrograph (Rosemead Condos: A-1) | 0 200 400 600 800 Time (minutes) 1000 1200 1400 1600 Condition.pdf Peak Flow Hydrologic Analysis File location: K/ORA_LDEV/194053016 - Rosemead Condos/Reports/H&H/Calculations/Hydrocalc/Rosemead Condos Report Proposed Version: HydroCalc 1.0.3 Input Parameters Project Name Rosemead Condos Subarea ID A-1Area (ac) 4.59Flow Path Length (ft) 543.0Flow Path Slope (vft/hft) 0.00850-yr Rainfall Depth (in) 6.0Percent Impervious 0.85Soil Type 6Design Storm Frequency 25-yr Fire Factor 0LID False Output Results Modeled (25-yr) Rainfall Depth (in) 5.268Peak Intensity (in/hr) 2.5201 Undeveloped Runoff Coefficient (Cu) 0.7886Developed Runoff Coefficient (Cd) 0.8833Time of Concentration (min) 8.0Clear Peak Flow Rate (cfs) 10.2171Burned Peak Flow Rate (cfs) 10.217124-Hr Clear Runoff Volume (ac-ft) 1.588524-Hr Clear Runoff Volume (cu-ft) 69196.8003 12 : 10} Fl o w (c f s ) =) Hydrograph (Rosemead Condos: A-1) Time (minutes) 1000 1200 1400 1600 Condition.pdf Peak Flow Hydrologic Analysis File location: K/ORA_LDEV/194053016 - Rosemead Condos/Reports/H&H/Calculations/Hydrocalc/Rosemead Condos Report Proposed Version: HydroCalc 1.0.3 Input Parameters Project Name Rosemead Condos Subarea ID B-1Area (ac) 4.68Flow Path Length (ft) 698.0Flow Path Slope (vft/hft) 0.01585th Percentile Rainfall Depth (in) 0.9Percent Impervious 0.85Soil Type 6Design Storm Frequency 85th percentile storm Fire Factor 0LID True Output Results Modeled (85th percentile storm) Rainfall Depth (in) 0.9Peak Intensity (in/hr) 0.2244 Undeveloped Runoff Coefficient (Cu) 0.1Developed Runoff Coefficient (Cd) 0.78Time of Concentration (min) 32.0Clear Peak Flow Rate (cfs) 0.8192Burned Peak Flow Rate (cfs) 0.819224-Hr Clear Runoff Volume (ac-ft) 0.271524-Hr Clear Runoff Volume (cu-ft) 11827.4507 Biofiltration Factor Runoff Volume 17,750 09 r oa} O07} oon T Fl o w (c f s ) oa T 02} 0.1} 0.0 i 1 1 1 L Hydrograph (Rosemead Condos: B-1) | 800 Time (minutes) 1000 1200 1400 1600 Condition.pdf Peak Flow Hydrologic Analysis File location: K/ORA_LDEV/194053016 - Rosemead Condos/Reports/H&H/Calculations/Hydrocalc/Rosemead Condos Report Proposed Version: HydroCalc 1.0.3 Input Parameters Project Name Rosemead Condos Subarea ID B-1Area (ac) 4.68Flow Path Length (ft) 698.0Flow Path Slope (vft/hft) 0.01550-yr Rainfall Depth (in) 6.0Percent Impervious 0.85Soil Type 6Design Storm Frequency 25-yr Fire Factor 0LID False Output Results Modeled (25-yr) Rainfall Depth (in) 5.268Peak Intensity (in/hr) 2.3844 Undeveloped Runoff Coefficient (Cu) 0.7745Developed Runoff Coefficient (Cd) 0.8812Time of Concentration (min) 9.0Clear Peak Flow Rate (cfs) 9.8328Burned Peak Flow Rate (cfs) 9.832824-Hr Clear Runoff Volume (ac-ft) 1.619624-Hr Clear Runoff Volume (cu-ft) 70549.2467 Hydrograph (Rosemead Condos: B-1)10 : Fl o w (c f s ) 0 200 800 Time (minutes) 1000 1200 1400 1600 Condition.pdf Depth Q Area Veloc Wp (ft) (cfs) (sqft) (ft/s) (ft) 0.20 0.476 0.165 2.89 1.29 0.40 2.002 0.451 4.44 1.86 0.60 4.438 0.794 5.59 2.32 0.80 7.631 1.175 6.50 2.74 1.00 11.39 1.579 7.21 3.15 1.20 15.25 1.974 7.73 3.55 1.40 18.98 2.353 8.07 3.97 1.60 22.12 2.695 8.21 4.43 1.80 24.11 2.979 8.09 5.00 2.00 22.62 3.142 7.20 6.28 Hydraflow Express - A-1 (24-in RCP) - 09/25/24 ATTACHMENT 2 STORM DRAIN SIZING CALCULATIONS Rosemead Condos | Hydrology & Hydraulics Report Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Wednesday, Sep 25 2024 A-1 (24-in RCP) 25-Year Circular Highlighted Diameter (ft) = 2.00 Depth (ft) = 2.00 Q (cfs) = 22.62 Area (sqft) = 3.14 Invert Elev (ft) = 100.00 Velocity (ft/s) = 7.20 Slope (%) = 1.00 Wetted Perim (ft) = 6.28 N-Value = 0.013 Crit Depth,Yc (ft) = 1.70 Top Width (ft) = 0.00 Calculations EGL (ft) = 2.81 Compute by: Q vs Depth No. Increments = 10 Elev (ft) Section Depth (ft) 103.00 3.00 102.50 2.50 102.00 Pe Be 2.00 7 TN/ N\ 7 ~\101.50 — v4 \ 1.50 {10.217 cfs [ \ HProp. A-1 <C 101.00 S 1.00 100.50 = 0.50 100.00 SA 0.00 6.547 cfs 7 (Ex. offsite) — (15" RCP full flow) 99.50 — -0.50 0 1 2 3 4 Reach (ft) CAUSERSWEREMY.JOHNSONDOGUMENTSIDYOIGMP_VI0.DWG 10/18/2019 10:02 AM PR O J E C T SU M M A R Y CA L C U L A T I O N DE T A I L S + LO A D I N G = HS 2 0 / H S 2 5 + AP P R O X . LIN E A R FO O T A G E = 62 1 LF ST O R A G E SU M M A R Y = ST O R A G E VO L U M E RE Q U I R E D = 17 , 4 0 0 GF * PIP E ST O R A G E VO L U M E = 17 , 5 5 8 CF » BA C K F I L L ST O R A G E VO L U M E = 0 CF » TO T A L ST O R A G E PR O V I D E D = 17 , 5 5 8 CF PI P E DE T A I L S * DI A M E T E R = 72 " = CO R R U G A T I O N = 5x 1 - GA G E = 16 = CO A T I N G = AL T 2 = WA L L TY P E = SO L I D » BA R R E L SP A C I N G = 36 " BA C K F I L L DE T A I L S * WI D T H AT EN D S = 12 " * AB O V E PIP E = 0" = WI D T H AT SID E S = 12 " - BE L O W PIP E = 0" NO T E S « AL L RI S E R AN D ST U B DIM E N S I O N S AR E TO CE N T E R L I N E . AL L EL E V A T I O N S , DI M E N S I O N S , AN D LO C A T I O N S OF RIS E R S AN D IN L E T S , SH A L L BE VE R I F I E D BY TH E EN G I N E E R OF RE C O R D PR I O R TO RE L E A S I N G FO R FA B R I C A T I O N . * AL L FIT T I N G S AN D RE I N F O R C E M E N T CO M P L Y WIT H AS T M A9 9 8 « AL L RI S E R S AN D ST U B S AR E 22 4 " x JG CO R R U G A T I O N AN D 16 GA G E UN L E S S OT H E R W I S E NO T E D . * RIS E R S TO BE FIE L D TR I M M E D TO GR A D E . * QU A N T I T Y OF PIP E SH O W N DO E S NO T PR O V I D E EX T R A PIP E FO R CO N N E C T I N G TH E SY S T E M TO EX I S T I N G PI P E OR DR A I N A G E ST R U C T U R E S . OU R SY S T E M AS DE T A I L E D PR O V I D E S NO M I N A L IN L E T AN D / O R OU T L E T PI P E ST U B FO R CO N N E C T I O N TO EX I S T I N G DR A I N A G E FA C I L I T I E S . IF AD D I T I O N A L PIP E IS NE E D E D IT IS TH E RE S P O N S I B I L I T Y OF TH E CO N T R A C T O R . « BA N D TY P E TO BE DE T E R M I N E D UP O N FIN A L DE S I G N . « TH E PR O J E C T SU M M A R Y IS RE F L E C T I V E OF TH E DY O D S DE S I G N , QU A N T I T I E S AR E AP P R O X . AN D SH O U L D BE VE R I F I E D UP O N FI N A L DE S I G N AN D AP P R O V A L . FO R EX A M P L E , TO T A L EX C A V A T I O N DO E S NO T CO N S I D E R AL L VA R I A B L E S SU C H AS SH O R I N G AN D ON L Y AC C O U N T S FO R MA T E R I A L WIT H I N TH E ES T I M A T E D EX C A V A T I O N FO O T P R I N T . * TH E S E DR A W I N G S AR E FO R CO N C E P T U A L PU R P O S E S AN D DO NO T RE F L E C T AN Y LO C A L PR E F E R E N C E S OR RE G U L A T I O N S . PL E A S E CO N T A C T YO U R LO C A L CO N T E C H RE P FO R MO D I F I C A T I O N S . 51.0" te 10 1 - 0 " |<|< AS S E M B L Y SC A L E : 1" = 1 0 ' gs pro v i d suc h us e . If dsc r e o a n c es be t w e n the su p p l i e d io r m a i o n up o n wi c h a5alt e wo k pro g r e s s e s , ne s e dis c r e p a n c i e s mus t be ro p o r i e d aCo n t e c Ca n t o c h Ww N T E C H EN G I N E E R E D SO L U T I O N S LL C ww w . C o n t e c h E S . c o m 90 2 5 Ce n t r e Po i n t e Dr, Su i t e 40 0 , We s t Ch e s t e r , OH 45 0 8 9 co p s ro ablyor ds r ba o on sin g in c o m e | DA T E RE V I S I O N DE S C R I P T I O N 80 0 - 3 3 8 - 1 1 2 2 51 3 - 6 4 5 - 7 0 0 0 51 3 - 6 4 5 - 7 9 8 3 FA X AS A I T E A L L LE A S I= CM P DE T E N T I O N SY S T E M S CO N T E C H DY O D S DR A W I N G DY Q 6 0 3 5 7 Ro s e m e a d Co n d o m i n i u m s A- 1 CM P - Ro s e m e a d Co n d o s Ro s e m e a d , CA DE T E N T I O N SY S T E M PR O J E C T No . 42 6 9 4 SE Q No . |D A T E : 60 3 5 7 10 7 2 1 2 0 2 4 DE S I G N E D : DY O DR A W N . DY O CH E C K E D : ov o AP P R O V E D : ov o SH E E T NO . CAEXPORTS\TEMPLATESIGMP_V10.DWG 10/18/2019 10:02 AM PR O J E C T SU M M A R Y CA L C U L A T I O N DE T A I L S + LO A D I N G = HS 2 0 / H S 2 5 + AP P R O X . LIN E A R FO O T A G E = 62 9 LF ST O R A G E SU M M A R Y = ST O R A G E VO L U M E RE Q U I R E D = 17 , 7 5 0 CF * PIP E ST O R A G E VO L U M E = 17 , 7 8 5 CF » BA C K F I L L ST O R A G E VO L U M E = 0 CF = TO T A L ST O R A G E PR O V I D E D = 17 , 7 8 5 CF PI P E DE T A I L S * DI A M E T E R = 72 " = CO R R U G A T I O N = 5x 1 - GA G E = 16 = CO A T I N G = AL T 2 = WA L L TY P E = SO L I D » BA R R E L SP A C I N G = 36 " BA C K F I L L DE T A I L S * WI D T H AT EN D S = 24 " * AB O V E PIP E = 0" = WI D T H AT SID E S = 24 " - BE L O W PIP E = 0" NO T E S « AL L RI S E R AN D ST U B DIM E N S I O N S AR E TO CE N T E R L I N E . AL L EL E V A T I O N S , DI M E N S I O N S , AN D LO C A T I O N S OF RIS E R S AN D IN L E T S , SH A L L BE VE R I F I E D BY TH E EN G I N E E R OF RE C O R D PR I O R TO RE L E A S I N G FO R FA B R I C A T I O N . * AL L FIT T I N G S AN D RE I N F O R C E M E N T CO M P L Y WIT H AS T M A9 9 8 « AL L RI S E R S AN D ST U B S AR E 22 4 " x JG CO R R U G A T I O N AN D 16 GA G E UN L E S S OT H E R W I S E NO T E D . * RIS E R S TO BE FIE L D TR I M M E D TO GR A D E . * QU A N T I T Y OF PIP E SH O W N DO E S NO T PR O V I D E EX T R A PIP E FO R CO N N E C T I N G TH E SY S T E M TO EX I S T I N G PI P E OR DR A I N A G E ST R U C T U R E S . OU R SY S T E M AS DE T A I L E D PR O V I D E S NO M I N A L IN L E T AN D / O R OU T L E T PI P E ST U B FO R CO N N E C T I O N TO EX I S T I N G DR A I N A G E FA C I L I T I E S . IF AD D I T I O N A L PIP E IS NE E D E D IT IS TH E RE S P O N S I B I L I T Y OF TH E CO N T R A C T O R . « BA N D TY P E TO BE DE T E R M I N E D UP O N FIN A L DE S I G N . « TH E PR O J E C T SU M M A R Y IS RE F L E C T I V E OF TH E DY O D S DE S I G N , QU A N T I T I E S AR E AP P R O X . AN D SH O U L D BE VE R I F I E D UP O N FI N A L DE S I G N AN D AP P R O V A L . FO R EX A M P L E , TO T A L EX C A V A T I O N DO E S NO T CO N S I D E R AL L VA R I A B L E S SU C H AS SH O R I N G AN D ON L Y AC C O U N T S FO R MA T E R I A L WIT H I N TH E ES T I M A T E D EX C A V A T I O N FO O T P R I N T . * TH E S E DR A W I N G S AR E FO R CO N C E P T U A L PU R P O S E S AN D DO NO T RE F L E C T AN Y LO C A L PR E F E R E N C E S OR RE G U L A T I O N S . PL E A S E CO N T A C T YO U R LO C A L CO N T E C H RE P FO R MO D I F I C A T I O N S . 42-0" - 12 1 - 0 " AS S E M B L Y SC A L E : 1" = 2 0 ' gs pro v i d suc h us e . If dsc r e o a n c es be t w e n the su p p l i e d io r m a i o n up o n wi c h a5alt e wo k pro g r e s s e s , ne s e dis c r e p a n c i e s mus t be ro p o r i e d aCo n t e c Ca n t o c h Ww N T E C H EN G I N E E R E D SO L U T I O N S LL C ww w . C o n t e c h E S . c o m 90 2 5 Ce n t r e Po i n t e Dr, Su i t e 40 0 , We s t Ch e s t e r , OH 45 0 8 9 co p s ro ablyor ds r bas s on sin g in c o m e | DA T E RE V I S I O N DE S C R I P T I O N BY 80 0 - 3 3 8 - 1 1 2 2 51 3 - 6 4 5 - 7 0 0 0 51 3 - 6 4 5 - 7 9 8 3 FA X AS A I T E A L L LE A S I= CM P DE T E N T I O N SY S T E M S CO N T E C H DY O D S DR A W I N G DY Q 6 0 4 8 5 Ro s e m e a d Co n d o m i n i u m s B- 1 CM P - Ro s e m e a d Co n d o s Ro s e m e a d , CA DE T E N T I O N SY S T E M PR O J E C T No . 42 6 9 4 SE Q No . |D A T E : 60 4 8 5 10 7 2 1 2 0 2 4 DE S I G N E D : DY O DR A W N . DY O CH E C K E D : ov o AP P R O V E D : ov o SH E E T NO . CAEXPORTS\TEMPLATESIGMP_V10.DWG 10/18/2019 10:02 AM IN GE O G R A P H I E S WI T H IN S T A L L A T I O N NO T E S SA L T I N G . SE E TA B L E 1: MI N . | CO R R . DI A M E T E R . D | co v E R | PR O F I L E B" - 1 0 " 12 " 11 / 2 " x 14 4 " 12 " 4 8 " 12 " 22 3 " x 14 2 " >4 8 " - 9 6 " 12 " 3x 1 5 " x1 " >0 6 " Dig 3x 1 5 " x1 " COVER DEPTH SEE TABLE 1) ST R U C T U R A L BA C K F I L L MU S T EX T E N D TO LI M I T S OF TH E TA B L E TO T A L HE I G H T OF CO M P A C T E D CO V E R FO R CO N V E N T I O N A L HIG H W A Y LO A D S IS ME A S U R E D FR O M TO P OF PI P E TO BO T T O M OF FL E X I B L E PA V E M E N T OR TO P OF RIG I D PA V E M E N T UL T R A F L O AL S O AV A I L A B L E FO R SIZ E S 18 " - 12 0 " WIT H 3/ 4 " x 3/4 " x 7 1/2 " CO R R U G A T I O N PROLRE DB DL LB DO TA B L E 2: SO L I D ST A N D A R D SIT E EN G I N E E R . TR E N C H NY RU R A L SA AB O V E DE T A I L IS A RE C O M M E N D A T I O N . CO N S U L T GE O T E C H N I C A L EO R FO R PR O J E C T SP E C I F I C BA C K F I L L RE Q U I R E M E N T S . 7 7\¢ RE NK R NR O (y r EN V E L O P E EM B A N K M E N T FO R AD D I T I O N A L IN F O R M A T I O N . MIN I M U M WI D T H DE P E N D S ON SIT E CO N D I T I O N S AN D EN G I N E E R I N G JU D G E M E N T CM P DE T E N T I O N AN D CM P DR A I N A G E ST A N D A R D BA C K F I L L SP E C I F I C A T I O N S MA T E R I A L LO C A T I O N MA T E R I A L SP E C I F I C A T I O N DE S C R I P T I O N FIL L EN V E L O P E WID T H PE R EN G I N E E R OF RE C O R D MI N I M U M TR E N C H WID T H MU S T AL L O W RO O M FO R PR O P E R CO M P A C T I O N OF HA U N C H MA T E R I A L S UN D E R TH E PI P E . TH E SU G G E S T E D MI N I M U M TR E N C H WID T H , OR EO R RE C O M M E N D A T I O N : PIP E = 12 " D+ 16 " PIP E > 12 " : 1.6 D + 12 " MIN I M U M EM B A N K M E N T WID T H (I N FE E T ) FO R IN I T I A L FI L L EN V E L O P E : PI P E < 24 " : 3.0 D PIP E 24 " - 14 4 " D + 4'0 " PIP E > 14 4 " : D + 10 0 " FO U N D A T I O N AA S H T Q 26 . 5 . 2 OR PE R EN G I N E E R OF RE C O R D PR I O R TQ PL A C I N G TH E BE D D I N G , TH E FO U N D A T I O N MU S T BE CO N S T R U C T E D TO A UN I F O R M AN D ST A B L E GR A D E . IN TH E EV E N T TH A T UN S U I T A B L E FO U N D A T I O N MA T E R I A L S AR E EN C O U N T E R E D DU R I N G EX C A V A T I O N , TH E Y SH A L L BE RE M O V E D AN D FO U N D A T I O N BR O U G H T BA C K TO GR A D E WIT H A FI L L MA T E R I A L AP P R O V E D BY TH E EN G I N E E R OF RE C O R D . BE D D I N G AA S H T O M 43 : 3, 35 7 , 4, 46 7 , 5, 56 , 57 (A P P R O V E D RE G I O N A L EQ U I V A L E N T S IN C L U D E CA - 7 ) EN G I N E E R OF RE C O R D TO DE T E R M I N E IF BE D D I N G IS RE Q U I R E D . PIP E MA Y BE PL A C E D ON TH E TR E N C H BO T T O M OF A RE L A T I V E L Y LO O S E , NA T I V E SU I T A B L E WE L L GR A D E D GR A N U L A R MA T E R I A L TH A T IS RO U G H L Y SH A P E D TO FIT TH E BO T T O M OF TH E PIP E , 2" MI N DE P T H . TH E BE D D I N G MA T E R I A L MA Y BE SU I T A B L E FO U N D A T I O N SO I L S CO N F O R M I N G TO AA S H T O SO I L CL A S S I F I C A T I O N S A1 , A2 , OR A3 WIT H MA X I M U M PA R T I C L E SI Z E OF 3" PE R AA S H T O 26 . 3 . 8 . CO R R U G A T E D ME T A L PIP E CR I T I C A L BA C K F I L L AA S H T O M 14 5 : A- 1 , A- 2 , A- 3 * BA C K F I L L AA S H T O M 14 5 : A- 1 , A- 2 , A- 3 HA U N C H ZO N E MA T E R I A L SH A L L BE HA N D SH O V E L E D OR SH O V E L SL I C E D IN T O PL A C E TO AL L O W FO R PR O P E R CO M P A C T I O N WIT H O U T SO F T SP O T S . BA C K F I L L SH A L L BE PL A C E D IN 8" +/- LO O S E LI F T S AN D CO M P A C T E D TO 80 % ST A N D A R D PR O C T O R PE R AA S H T O T 99 . BA C K F I L L SH A L L BE PL A C E D SU C H TH A T TH E R E IS NO MO R E TH A N A TH R E E LIF T (2 4 ) DIF F E R E N T I A L BE T W E E N AN Y OF TH E PIP E S AT AN Y TIM E DU R I N G TH E BA C K F I L L PR O C E S S . TH E BA C K F I L L SH O U L D BE AD V A N C E D AL O N G TH E LE N G T H OF TH E SY S T E M TO AV O I D DI F F E R E N T I A L LO A D I N G . WE L L GR A D E D GR A N U L A R MA T E R I A L WH I C H MA Y CO N T A I N SM A L L AM O U N T S OF SIL T OR CL A Y AN D MA X I M U M PA R T I C L E SIZ E OF 3" (P E R AA S H T O 26 . 3 . 8 . 1 AN D 12 . 4 - 1 . 3 ) CO V E R MA T E R I A L UP TO MI N . CO V E R - SE E 5A A N D 8B AB O V E AB O V E MIN . CO V E R - PE R EN G I N E E R OF RE C O R D CO V E R MA T E R I A L MA Y IN C L U D E NO N - B I T U M I N O U S , GR A N U L A R RO A D BA S E MA T E R I A L WIT H I N MIN CO V E R LIM I T S RIG I D OR FL E X I B L E PA V E M E N T (IF PE R EN G I N E E R OF RE C O R D FL E X I B L E PA V E M E N T SH O U L D NO T BE CO U N T E D AS PA R T OF TH E FI L L HE I G H T OV E R TH E CM P . FIN A L BA C K F I L L MA T E R I A L SE L E C T I O N AN D CO M P A C T I O N AP P L I C A B L E ) RE Q U I R E M E N T S SH A L L FO L L O W TH E PR O J E C T PL A N S AN D SP E C I F I C A T I O N S PE R TH E EN G I N E E R OF RE C O R D . OP T I O N A L SID E GE O T E X T I L E NO N E GE O T E X T I L E LA Y E R IS RE C O M M E N D E D ON SID E S OF EX C A V A T I O N TO PR E V E N T SO I L MIG R A T I O N . OP T I O N A L GE C T E X T I L E BE T W E E N NO N E IF SO I L TY P E S DI F F E R AT AN Y PO I N T AB O V E PIP E IN V E R T , A GE O T E X T I L E LA Y E R IS RE C O M M E N D E D TO BE PL A C E D BE T W E E N TH E LA Y E R S TO PR E V E N T SO I L LA Y E R S MI G R A T I O N . NO T E S : e FO R MU L T I P L E BA R R E L IN S T A L L A T I O N S , TH E RE C O M M E N D E D ST A N D A R D SP A C I N G BE T W E E N PA R A L L E L PI P E RU N S SH A L L BE TH E PI P E DIA M E T E R /2 BU T NO LE S S TH A N 12 " FO R DI A M E T E R S <7 2 " . FO R 72 " AN D LA R G E R DIA M E T E R S , TH E MI N I M U M SP A C I N G IS 36 " . CO N T A C T YO U R CO N T E C H RE P R E S E N T A T I V E FO R NO N S T A N D A R D SP A C I N G . * AP P R O V E D RE G I O N A L EQ U I V A L E N T S FO R SE C T I O N 5A IN C L U D E CA - 7 , CO D Q T #6 7 , MID O T 2G , 34 G , OR 21 A A ST O N E OR GR A V E L ; #8 ; #5 7 , MI D O T 8A , 2G , 3G , 34 G . MA N U F A C T U R E R RE C O M M E N D E D BA C K F I L L NO T TO SC A L E 1. WH E N PL A C I N G TH E FI R S T LI F T S OF BA C K F I L L IT IS IM P O R T A N T TO MA K E SU R E TH A T TH E BA C K F I L L IS PR O P E R L Y CO M P A C T E D UN D E R AN D AR O U N D TH E PI P E HA U N C H E S . 2. OT H E R A L T E R N A T E BA C K F I L L MA T E R I A L MA Y BE AL L O W E D DE P E N D I N G ON SI T E SP E C I F I C CO N D I T I O N S , AS AP P R O V E D BY 3. BA C K F I L L US I N G CO N T R O L L E D LO W - S T R E N G T H MA T E R I A L (C L S M , "F L A S H FIL L " OR "F L O W A B L E FIL L " ) MA Y BE US E D WH E N TH E SP A C I N G BE T W E E N TH E PI P E S WIL L NO T AL L O W FO R PL A C E M E N T AN D AD E Q U A T E CO M P A C T I O N OF TH E BA C K F I L L . CO N T A C T CO N T E C H FO R FU R T H E R EV A L U A T I O N . 4. IF SA L T I N G AG E N T S FO R SN O W AN D IC E RE M O V A L AR E US E D ON OR NE A R TH E PR O J E C T , A GE O M E M B R A N E BA R R I E R IS RE C O M M E N D E D OV E R TH E UP P E R HA L F OF TH E PI P E . TH E GE O M E M B R A N E LIN E R IS IN T E N D E D TO HE L P PR O T E C T TH E SY S T E M FR O M TH E PO T E N T I A L AD V E R S E EF F E C T S TH A T MA Y RE S U L T FR O M A CH A N G E IN TH E SU R R O U N D I N G EN V I R O N M E N T OV E R A PE R I O D OF TIM E . PL E A S E RE F E R TO TH E CO R R U G A T E D ME T A L PIP E DE T E N T I O N DE S I G N GU I D E gs pro v e s suc h us e . If dsc r e o a n c es be t w e n the su p p l i e d io r m a i o n up o n wi c h ww w . C o n t e c h E S . c o m a5alt e wo k pro g r e s s e s , ne s e dis c r e p a n c i e s mus t be ro p o r i e d aCo n t e c Ca n t o c h Ww N T E C H EN G I N E E R E D SO L U T I O N S LL C 90 2 5 Ce n t r e Po i n t e Dr , Su i t e 40 0 , We s t Ch e s t e r , OH 45 0 8 9 AS A I T E A L L LE A S I= CM P DE T E N T I O N SY S T E M S DY Q 6 0 4 8 5 Ro s e m e a d Co n d o m i n i u m s Ba s i n B- 1 Ro s e m e a d , CA CO N T E C H DY O D S acc o p s no ablty‘o r dos i g r s ba s e on mis s i n g , IN C O M oear in a c o u a i s DA T E RE V I S I O N DE S C R I P T I O N 80 0 - 3 3 8 - 1 1 2 2 51 3 - 6 4 5 - 7 0 0 0 BY 51 3 - 6 4 5 - 7 9 8 3 FA X DE T E N T I O N SY S T E M DR A W I N G PR O J E C T No . 42 6 9 4 DA T E : 10 7 2 1 2 0 2 4 SE Q No 60 4 8 5 DE S I G N E D : DY O DR A W N . DY O CH E C K E D : ov o AP P R O V E D : ov o SH E E T NO . CAEXPORTS\TEMPLATESIGMP_V10.DWG 10/18/2019 10:02 AM TE M P O R A R Y CO V E R FO R CO N S T R U C T I O N LO A D S HE I G H T OF FIN I S H E D CO V E R 14 CO N S T R U C T I O N LO A D S FO R TE M P O R A R Y CO N S T R U C T I O N VE H I C L E LO A D S , AN EX T R A A M O U N T OF CO M P A C T E D CO V E R MA Y BE RE Q U I R E D OV E R TH E TO P OF TH E PIP E . TH E HE I G H T - O F - C O V E R SH A L L ME E T TH E MIN I M U M RE Q U I R E M E N T S SH O W N IN TH E TA B L E BE L O W . TH E US E OF HE A V Y CO N S T R U C T I O N EQ U I P M E N T NE C E S S I T A T E S GR E A T E R PR O T E C T I O N FO R TH E PIP E TH A N FIN I S H E D GR A D E CO V E R MIN I M U M S FO R NO R M A L HIG H W A Y TR A F F I C . PIP E SP A N , AX L E LO A D S (k i p s ) IN C H E S 18 5 0 | 50 - 7 5 | 75 - 1 1 0 | 11 0 - 1 5 0 MI N I M U M CO V E R (F T ) 12 - 4 2 20 25 30 30 48 - 7 2 30 3. 0 35 40 78 - 1 2 0 30 35 40 40 12 6 - 1 4 4 35 40 45 45 *M I N I M U M CO V E R MA Y VA R Y , DE P E N D I N G ON LO C A L CO N D I T I O N S . TH E CO N T R A C T O R MU S T PR O V I D E TH E AD D I T I O N A L CO V E R RE Q U I R E D TO AV O I D DA M A G E TO TH E PI P E . MI N I M U M CO V E R IS ME A S U R E D FR O M TH E TO P OF TH E PIP E TO TH E TQ P OF TH E MA I N T A I N E D CO N S T R U C T I O N RO A D W A Y SU R F A C E . CO N S T R U C T I O N LO A D I N G DI A G R A M SC A L E : N.T . S . SP E C I F I C A T I O N FO R DE S I G N E D DE T E N T I O N SY S T E M SC O P E TH I S SP E C I F I C A T I O N CO V E R S TH E MA N U F A C T U R E AN D IN S T A L L A T I O N OF TH E DE S I G N E D DE T E N T I O N SY S T E M DE T A I L E D IN TH E PR O J E C T PL A N S . PIP E RE Q U I R E M E N T S LIS T E D BE L O W : MA T E R I A L AL U M I N I Z E D TY P E 2: AA S H T O M- 3 6 OR AS T M A-7 6 0 TH E MA T E R I A L SH A L L CO N F O R M TO TH E AP P L I C A B L E RE Q U I R E M E N T S LI S T E D BE L O W : GA L V A N I Z E D : AA S H T O M- 3 6 OR AS T M A- 7 6 0 AL U M I N I Z E D TY P E 2 ST E E L CO I L S SH A L L CO N F O R M TO TH E RE Q U I R E M E N T S OF AA S H T O M- 2 7 4 OR AS T M A- 9 2 . AF R F O L Y A M E R E CO A T E D : AA S H T O M- 2 4 5 OR AS T M A-7 6 2 AL U M I N U M : AA S H T O M- 1 9 6 OR AS T M B- 7 4 5 AP P L I C A B L E HA N D L I N G AN D AS S E M B L Y TH E GA L V A N I Z E D ST E E L CO I L S SH A L L CO N F O R M TO TH E RE Q U I R E M E N T S OF AA S H T O M- 2 1 8 OR AS T M A- 9 2 9 . TH E PI P E SH A L L BE MA N U F A C T U R E D IN AC C O R D A N C E TO TH E AP P L I C A B L E f:GA S K E T MA T E R I A L SU F F I C I E N T TO PR E V E N T SL A B FR O M BE A R I N G ON RIS E R TO BE PR O V I D E D BY CO N T R A C T O R . #4 DIA G O N A L TR I M BA R (T Y P . 4 PL A C E S ) , SE E NO T E 7. A RE I N F O R C I N G TA B L E AC C E S S CA S T I N G TO BE — PR O V I D E D AN D IN S T A L L E D 2 CM P BE A R I N G BY CO N T R A C T O R . A ZB RE I N F O R C I N G PR E S S U R E RI S E R (P S F ) : — : & . oq . #5 @ 12 " OC E W 2. 4 1 0 . : Ta N 2 ax a % #5 @ 12 " OC E W 1. 7 8 0 a, So I. 24 6 " I. #5 @ 12 " OC E W 2, 1 2 0 2 — 4.6 " X 46 " #5 @ 12 " OC E W 1,5 3 0 Je s i #5 @ 10 " OC E W 1, 8 9 0 @ CM P | R I S E R —— — = { 3 % Xs % #5 @ 10 " OC E W 1. 3 5 0 & a " w“ 5- 6 " 5- 6 " " #5 @ 10 " OC E W 1,7 2 0 Ei 42 a ca X 5- 6 " #5 @ 9" OC E W 1. 2 1 0 Lr " TYP de e 2? °8 ny e . & wr | 76 8 oo #5 @ 9" OC E W 1, 6 0 0 = X6 8 #5 @ 8" OC E W 1,1 0 0 SE C T I O N VI E W - ** AS S U M E D SO I L BE A R I N G CA P A C I T Y “a ~ Db , 2A = A | 2% J 2 ba d #4 DIA G O N A L TR I M BA R (T Y P . 4 PL A C E S ) , —| SE E NO T E 7. 2" CO V E R ~T (T Y P ) od | \ OP E N I N G IN PR O T E C T I O N SL A B FO R OP E N I N G IN CA S T I N G PR O T E C T I O N _ | SL A B FO R CA S T I N G IN T E R R U P T E D BA R RE P L A C E M E N T , SE E NO T E 6. ST A N D A R D ST A N D A R D RE I N F O R C I N G , ~~ RE I N F O R C I N G , SE E TA B L E SE E TA B L E RO U N D OP T I O N PL A N VI E W Ze TH E PO L Y M E R CO A T E D ST E E L CO I L S SH A L L CO N F O R M TO TH E RE Q U I R E M E N T S OF AA S H T O M- 2 4 6 OR A S T M A- 7 4 2 . TH E AL U M I N U M CO I L S SH A L L CO N F O R M TO TH E AP P L I C A B L E OF AA S H T O M- 1 9 7 OR AS T M B-7 4 4 . CO N S T R U C T I O N LO A D S CO N S T R U C T I O N LO A D S MA Y BE HIG H E R TH A N FIN A L LO A D S . FO L L O W TH E MA N U F A C T U R E R ' S OR NC S P A GU I D E L I N E S . NO T E TH E S E DR A W I N G S AR E FO R CO N C E P T U A L PU R P O S E S AN D DO NO T RE F L E C T AN Y LO C A L PR E F E R E N C E S OR RE G U L A T I O N S . PL E A S E CO N T A C T YO U R LO C A L CO N T E C H RE P FO R MO D I F I C A T I O N S , SH A L L BE IN AC C O R D A N C E WI T H NC S P ' S (N A T I O N A L CO R R U G A T E D ST E E L AR R B I E A S B D C I A T I O N ) FO R AL U M I N I Z E D TY P E 2, GA L V A N I Z E D OR PO L Y M E R CO A T E D ST E E L . SH A L L BE IN A C C O R D A N C E WIT H TH E MA N U F A C T U R E R ' S RE C O M M E N D A T I O N S FO R AL U M I N U M PI P E . RE Q U I R E M E N T S IN S T A L L A T I O N SH A L L BE IN AC C O R D A N C E WI T H AA S H T O ST A N D A R D SP E C I F I C A T I O N S FO R HIG H W A Y BR I D G E S , SE C T I O N 26 , DIV I S I O N II DIV I S I O N Il OR AS T M A-7 9 8 (F O R AL U M I N I Z E D TY P E 2, GA L V A N I Z E D OR PO L Y M E R CO A T E D ST E E L ) OR A S T M B-7 8 8 (F O R AL U M I N U M PIP E ) AN D IN CO N F O R M A N C E WIT H TH E PR O J E C T PL A N S AN D SP E C I F I C A T I O N S . IF TH E R E AR E AN Y IN C O N S I S T E N C I E S OR CO N F L I C T S TH E CO N T R A C T O R SH O U L D DI S C U S S AN D RE S O L V E WI T H TH E SIT E EN G I N E E R . IT IS AL W A Y S TH E RE S P O N S I B I L I T Y OF TH E CO N T R A C T O R TO FO L L O W OS H A GU I D E L I N E S FO R SA F E PR A C T I C E S . NO T E S : . DE S I G N IN AC C O R D A N C E WIT H AA S H T O , 17 t h ED I T I O N DE S I G N LO A D HS 2 5 , nN@ EA R T H CO V E R = 1' MA X . ~. CO N C R E T E ST R E N G T H = 3,5 0 0 ps i 2). RE I N F O R C I N G ST E E L = AS T M A6 1 5 , GR A D E 60 . o. PR O V I D E AD D I T I O N A L RE I N F O R C I N G AR O U N D OP E N I N G S EQ U A L TO TH E BA R S IN T E R R U P T E D , HA L F EA C H SID E . AD D I T I O N A L BA R S TO BE IN TH E SA M E PL A N E . IN T E R R U P T E D BA R RE P L A C E M E N T , SE E NO T E 6. = SQ U A R E OP T I O N PL A N VI E W ~. TR I M OP E N I N G WIT H DIA G O N A L #4 BA R S , EX T E N D BA R S A MI N I M U M OF 12 " BE Y O N D OP E N I N G , BE N D BA R S AS RE Q U I R E D TO MA I N T A I N BA R CO V E R . *® PR O T E C T I O N SL A B AN D AL L MA T E R I A L S TO BE PR O V I D E D AN D IN S T A L L E D BY CO N T R A C T O R . © DE T A I L DE S I G N BY DE L T A EN G I N E E R I N G , BI N G H A M T O N , NY . MA N H O L E CA P DE T A I L SC A L E : N. T . S . gs pro v i o e d Ww N T E C H suc h us e . EN G I N E E R E D SO L U T I O N S LL C ww w . C o n t e c h E S . c o m AS A I T E A L L LE A S I= CM P DE T E N T I O N SY S T E M S Ba s i n B- 1 DY Q 6 0 4 8 5 Ro s e m e a d Co n d o m i n i u m s If dsc r e o a n c es be t w e n the su p p l i e d io r m a i o n up o n wi c h 90 2 5 Ce n t r e Po i n t e Dr, Su i t e 40 0 , We s t Ch e s t e r , OH 45 0 8 9 80 0 - 3 3 8 - 1 1 2 2 51 3 - 6 4 5 - 7 0 0 0 51 3 - 6 4 5 - 7 9 8 3 FA X a5alt e wk pro g r e s s e s , ne s e dis c r e p a n c i e s mus t be ro p o r i e d aCo n t e c Ca n t o c h acc o p s no ablty‘o r dos i g r s ba s e on mis s i n g , IN C O M oear in a c o u a i s DA T E RE V I S I O N DE S C R I P T I O N BY CO N T E C H DY O D S DR A W I N G Ro s e m e a d , CA DE T E N T I O N SY S T E M PR O J E C T No . 42 6 9 4 SE Q No 60 4 8 5 DA T E : 10 7 2 1 2 0 2 4 DE S I G N E D : DY O DR A W N . DY O CH E C K E D : ov o AP P R O V E D : ov o SH E E T NO . CAEXPORTS\TEMPLATESIGMP_V10.DWG 10/18/2019 10:02 AM CM P DE T E N T I O N IN S T A L L A T I O N GU I D E PR O P E R IN S T A L L A T I O N OF A FL E X I B L E UN D E R G R O U N D DE T E N T I O N SY S T E M WIL L EN S U R E LO N G - T E R M PE R F O R M A N C E . TH E CO N F I G U R A T I O N OF TH E S E SY S T E M S OF T E N RE Q U I R E S SP E C I A L CO N S T R U C T I O N PR A C T I C E S TH A T DIF F E R FR O M CO N V E N T I O N A L FL E X I B L E PIP E CO N S T R U C T I O N . CO N T E C H EN G I N E E R E D SO L U T I O N S ST R O N G L Y SU G G E S T S SC H E D U L I N G A PR E - C O N S T R U C T I O N ME E T I N G WIT H YO U R LO C A L SA L E S EN G I N E E R TO DE T E R M I N E IF AD D I T I O N A L ME A S U R E S , NO T CO V E R E D IN TH I S GU I D E , AR E AP P R O P R I A T E FO R YO U R SIT E . FO U N D A T I O N CO N S T R U C T A FO U N D A T I O N TH A T CA N SU P P O R T TH E DE S I G N LO A D I N G AP P L I E D BY TH E PI P E AN D AD J A C E N T BA C K F I L L WE I G H T AS WE L L AS MA I N T A I N IT S IN T E G R I T Y DU R I N G CO N S T R U C T I O N . IF SO F T OR UN S U I T A B L E SO I L S AR E EN C O U N T E R E D , RE M O V E TH E PO O R SO I L S DO W N TO A SU I T A B L E DE P T H AN D TH E N BU I L D UP TO TH E AP P R O P R I A T E EL E V A T I O N WI T H A CO M P E T E N T BA C K F I L L MA T E R I A L . TH E ST R U C T U R A L FI L L MA T E R I A L GR A D A T I O N SH O U L D NO T AL L O W TH E MIG R A T I O N OF FIN E S , WH I C H CA N CA U S E SE T T L E M E N T OF TH E DE T E N T I O N SY S T E M OR PA V E M E N T AB O V E . IF TH E ST R U C T U R A L FIL L MA T E R I A L IS NO T CO M P A T I B L E WIT H TH E UN D E R L Y I N G SO I L S AN EN G I N E E R I N G FA B R I C SH O U L D BE US E D AS A SE P A R A T O R . IN SO M E CA S E S , US I N G A ST I F F RE I N F O R C I N G GE O G R I D RE D U C E S OV E R EX C A V A T I O N AN D RE P L A C E M E N T FI L L QU A N T I T I E S . BE D D I N G - WE L L GR A D E D GR A N U L A R AN D SM A L L E R IN - S I T U TR E N C H WA L L IF EX C A V A T I O N IS RE Q U I R E D , TH E TR E N C H WA L L NE E D S TO BE CA P A B L E OF SU P P O R T I N G TH E LO A D TH A T TH E PIP E SH E D S AS TH E SY S T E M IS LO A D E D . IF SO I L S AR E NO T CA P A B L E OF SU P P O R T I N G TH E S E LO A D S , TH E PIP E CA N DE F L E C T . PE R F O R M A SIM P L E SO I L PR E S S U R E CH E C K US I N G TH E AP P L I E D LO A D S TO DE T E R M I N E TH E LIM I T S OF EX C A V A T I O N BE Y O N D TH E SP R I N G LIN E OF TH E OU T E R MO S T PI P E S . IN MO S T CA S E S TH E RE Q U I R E M E N T S FO R A SA F E WO R K EN V I R O N M E N T AN D PR O P E R BA C K F I L L PL A C E M E N T AN D CO M P A C T I O N TA K E CA R E OF TH I S CO N C E R N . BA C K F I L L PL A C E M E N T EM B A N K M E N T GE O T E X T I L E SE P A R A T I O N (A B O V E AN D BE L O W BE D D I N G ) WIT H UN I F O R M L Y GR A D E D BE D D I N G LA Y E R . CM P DE T E N T I O N SY S T E M IN S P E C T I O N AN D MA I N T E N A N C E WH E N FL O W A B L E FI L L IS US E D , YO U MU S T PR E V E N T PIP E FL O A T A T I O N . BA C K F I L L -WE L L GR A D E D $ GR A N U L A R AN D SM A L L E R TY P I C A L L Y , SM A L L LI F T S AR E PL A C E D BE T W E E N TH E PIP E S AN D TH E N AL L O W E D TO SE T - U P PR I O R TO TH E PL A C E M E N T OF TH E NE X T LIF T . TH E AL L O W A B L E TH I C K N E S S OF TH E CL S M LIF T IS AFU N C T I O N OF APR O P E R BA L A N C E BE T W E E N TH E UP L I F T FO R C E OF TH E CL S M , TH E OP P Q S I N G WE I G H T OF TH E PIP E , AN D TH E EF F E C T OF OT H E R RE S T R A I N I N G ME A S U R E S . TH E PIP E CA N CA R R Y LI M I T E D FL U I D PR E S S U R E WIT H O U T PIP E DIS T O R T I O N OR DI S P L A C E M E N T , WH I C H AL S O AF F E C T S TH E CL S M LI F T TH I C K N E S S . YO U R LO C A L CO N T E C H SA L E S EN G I N E E R CA N HE L P DE T E R M I N E TH E PR O P E R LIF T TH I C K N E S S IN S P E C T I O N UN D E R G R O U N D ST O R M W A T E R DE T E N T I O N AN D IN F I L T R A T I O N SY S T E M S MU S T BE IN S P E C T E D AN D MA I N T A I N E D AT RE G U L A R IN T E R V A L S FO R PU R P O S E S OF PE R F O R M A N C E AN D LO N G E V I T Y . IN S P E C T I O N IS TH E KE Y TO EF F E C T I V E MA I N T E N A N C E OF CM P DE T E N T I O N SY S T E M S AN D IS EA S I L Y PE R F O R M E D . CO N T E C H RE C O M M E N D S ON G O I N G , AN N U A L IN S P E C T I O N S . SI T E S WI T H HI G H TR A S H LO A D OR SM A L L CU T L E T CO N T R O L OR I F I C E S MA Y NE E D MO R E FR E Q U E N T IN S P E C T I O N S . TH E RA T E AT WH I C H TH E SY S T E M CO L L E C T S PO L L U T A N T S WIL L DE P E N D MO R E ON SIT E SP E C I F I C AC T I V I T I E S RA T H E R TH A N TH E SI Z E OR CO N F I G U R A T I O N OF TH E ST A G E PO U R S AS RE Q U I R E D TO — CO N T R O L FL O A T A T I O N AN D PI P E DIS T O R T I O N / D I S P L A G E M E N T SY S T E M . cL S M MA T E R I A L SH A L L BE WO R K E D IN T O TH E PIP E HA U N C H E S BY ME A N S OF SH O V E L - S L I C I N G , RO D D I N G , AI R TA M P E R , VIB R A T O R Y RO D , OR OT H E R EF F E C T I V E ME T H O D S . MA X I M U M UN B A L A N C E LI M I T E D TO 2 LIF T S (A P P R O X . 16 7 ) CO V E R GE O G R I D WA S N ' T US E D GE Q G R I D US E D TO RE D U C E TH E AM O L I N T OF LI N D E R C U T RA L A\ ¢ BA C K F I L L UN D E R C U T AN D RE P L A C E UN S U I T A B L E SO I L S GR A D E TH E FO U N D A T I O N SU B G R A D E TO A UN I F O R M OR SL I G H T L Y SL O P I N G GR A D E . IF TH E SU B G R A D E IS CL A Y OR RE L A T I V E L Y NO N - P O R Q U S AN D TH E CO N S T R U C T I O N SE Q U E N C E WIL L LA S T FO R AN EX T E N D E D PE R I O D OF TI M E , IT 1S BE S T TO SL O P E TH E GR A D E TO ON E EN D OF TH E SY S T E M . TH I S WIL L AL L O W EX C E S S WA T E R TO DR A I N QU I C K L Y , PR E V E N T I N G SA T U R A T I O N OF TH E SU B G R A D E . GE O M E M B R A N E BA R R I E R TH E RE S I S T I V I T Y OF A PR O J E C T SIT E MA Y CH A N G E OV E R TIM E DU E TO TH E US E OF VA R I O U S SA L T I N G , DE - I C I N G , AN D AG R I C U L T U R A L AG E N T S AP P L I E D ON OR NE A R TH E AR E A . TO MI T I G A T E TH E PO T E N T I A L IM P A C T OF TH E S E AG E N T S , AN HD P E ME M B R A N E LI N E R WIL L BE IN S T A L L E D ON TH E CR O W N OF EA C H PIP E , CR E A T I N G AN IM P E R M E A B L E BA R R I E R . TH I S ME A S U R E IS DE S I G N E D TO PR O T E C T TH E SY S T E M FR O M EN V I R O N M E N T A L CH A N G E S TH A T CO U L D LE A D TO PR E M A T U R E CO R R O S I O N AN D RE D U C E TH E OV E R A L L SE R V I C E LIF E . 20M I L P E IM P E R K E R S L E (2 Fo R 12 - 0 8 % ) 8 OR ae AN D ) SI S SR S NO N RR R 8" LO O S E LIF T S BE D D I N G CO N S T R U C T I O N LO A D I N G TY P I C A L L Y , TH E MI N I M U M CO V E R SP E C I F I E D FO R A PR O J E C T AS S U M E S H-2 0 LI V E LO A D . BE C A U S E CO N S T R U C T I O N LO A D S OF T E N EX C E E D DE S I G N LI V E LO A D S , IN C R E A S E D TE M P O R A R Y MI N I M U M CO V E R RE Q U I R E M E N T S AR E NE C E S S A R Y . SIN C E CO N S T R U C T I O N EQ U I P M E N T VA R I E S FR O M JO B TG JO B , IT IS BE S T TO AD D R E S S EQ U I P M E N T SP E C I F I C MIN I M U M CO V E R RE Q U I R E M E N T S WI T H YO U R LO C A L CO N T E C H SA L E S EN G I N E E R DU R I N G YO U R PR E - C O N S T R U C T I O N ME E T I N G IF AA S H T O T8 9 PR O C E D U R E S AR E DE T E R M I N E D IN F E A S I B L E BY TH E GE O T E C H N I C A L EN G I N E E R OF RE C O R D , CO M P A C T I O N 1S CO N S I D E R E D AD E Q U A T E WH E N NO FU R T H E R YIE L D I N G OF TH E MA T E R I A L IS OB S E R V E D UN D E R TH E CO M P A C T O R , OR UN D E R FO O T , AN D TH E GE O T E C H N I C A L EN G I N E E R OF RE C O R D (O R RE P R E S E N T A T I V E TH E R E O F ) IS SA T I S F I E D WI T H TH E LE V E L OF CO M P A C T I O N . FO R LA R G E SY S T E M S , CO N V E Y O R SY S T E M S , BA C K H O E S WI T H LO N G RE A C H E S OR DR A G L I N E S WIT H ST O N E BU C K E T S MA Y BE US E D TO PL A C E BA C K F I L L . ON C E MIN I M U M CO V E R FO R CO N S T R U C T I O N LO A D I N G AC R O S S TH E EN T I R E WI D T H OF TH E SY S T E M IS RE A C H E D , AD V A N C E TH E EQ U I P M E N T TO TH E EN D OF TH E RE C E N T L Y PL A C E D FIL L , AN D BE G I N TH E SE Q U E N C E AG A I N UN T I L TH E SY S T E M IS CO M P L E T E L Y BA C K F I L L E D . TH I S TY P E OF CO N S T R U C T I O N SE Q U E N C E PR O V I D E S RO O M FO R ST O C K P I L E D BA C K F I L L DIR E C T L Y BE H I N D TH E BA C K H O E , AS WE L L AS TH E MO V E M E N T OF CO N S T R U C T I O N TR A F F I C . MA T E R I A L ST O C K P I L E S ON TO P OF TH E IN L E T BA C K F I L L E D DE T E N T I O N SY S T E M SH O U L D BE LIM I T E D TO 8- TO 10 - F E E T HIG H AN D MU S T PR O V I D E BA L A N C E D LO A D I N G AC R O S S AL L BA R R E L S . TO DE T E R M I N E TH E PR O P E R CO V E R OV E R TH E PIP E S TO AL L O W TH E MO V E M E N T OF CO N S T R U C T I O N EQ U I P M E N T SE E TA B L E 1, OR CO N T A C T YO U R LO C A L CO N T E C H SA L E S EN G I N E E R . TY P I C A L BA C K F I L L SE Q U E N C E AD D I T I O N A L CO N S I D E R A T I O N S BE C A U S E MO S T SY S T E M S AR E CO N S T R U C T E D BE L O W - G R A D E , RA I N F A L L CA N RA P I D L Y FI L L TH E EX C A V A T I O N ; PO T E N T I A L L Y CA U S I N G FL O A T A T I O N AN D MO V E M E N T OF TH E PR E V I O U S L Y PL A C E D PI P E S . TO HE L P MIT I G A T E PO T E N T I A L PR O B L E M S , IT IS BE S T TO ST A R T TH E IN S T A L L A T I O N AT TH E DO W N S T R E A M EN D WI T H TH E OU T L E T AL R E A D Y CO N S T R U C T E D TO AL L O W A RO U T E FO R TH E WA T E R TO ES C A P E . TE M P O R A R Y DI V E R S I O N ME A S U R E S MA Y BE RE Q U I R E D FO R HIG H FL O W S DU E TO TH E RE S T R I C T E D NA T U R E OF TH E OU T L E T PI P E . CA T C H BA S I N WA T E R —_ WE I G H T E D PIP E WIT H MO B I L E CO N C R E T E BA R R I E R S (O R OT H E R RE M O V A B L E WE I G H T S ) MA I N T E N A N C E IN S P E C T I O N S SH O U L D BE PE R F O R M E D MO R E OF T E N IN EQ U I P M E N T WA S H D O W N AR E A S , IN CL I M A T E S WH E R E SA N D I N G AN D / O R SA L T I N G OP E R A T I O N S TA K E PL A C E , AN D IN OT H E R VA R I O U S IN S T A N C E S IN WH I C H ON E WO U L D EX P E C T HIG H E R AC C U M U L A T I O N S OF SE D I M E N T OR AB R A S I V E ! CO R R O S I V E CO N D I T I O N S . A RE C O R D OF EA C H IN S P E C T I O N IS TO BE MA I N T A I N E D FO R TH E LI F E OF TH E SY S T E M CM P DE T E N T I O N SY S T E M S SH O U L D BE CL E A N E D WH E N AN IN S P E C T I O N RE V E A L S AC C U M U L A T E D SE D I M E N T OR TR A S H |S CL O G G I N G TH E DIS C H A R G E OR I F I C E . AC C U M U L A T E D SE D I M E N T AN D TR A S H CA N TY P I C A L L Y BE EV A C U A T E D TH R O U G H TH E MA N H O L E OV E R TH E OU T L E T OR I F I C E . IF MA I N T E N A N C E IS NO T PE R F O R M E D AS RE C O M M E N D E D , SE D I M E N T AN D TR A S H MA Y AC C U M U L A T E IN FR O N T OF TH E OU T L E T OR I F I C E . MA N H O L E CO V E R S SH O U L D BE SE C U R E L Y SE A T E D FO L L O W I N G CL E A N I N G AC T I V I T I E S . CO N T E C H SU G G E S T S TH A T AL L SY S T E M S BE DE S I G N E D WIT H AN AC C E S S / I N S P E C T I O N MA N H O L E SI T U A T E D AT OR NE A R TH E IN L E T AN D TH E OU T L E T OR I F I C E . SH O U L D IT BE NE C E S S A R Y TO GE T IN S I D E TH E SY S T E M TO PE R F O R M MA I N T E N A N C E AC T I V I T I E S , AL L AP P R O P R I A T E PR E C A U T I O N S RE G A R D I N G CO N F I N E D SP A C E EN T R Y AN D OS H A RE G U L A T I O N S SH O U L D BE FO L L O W E D . AN N U A L IN S P E C T I O N S AR E BE S T PR A C T I C E FO R AL L UN D E R G R O U N D SY S T E M S . DU R I N G TH I S IN S P E C T I O N , IF EV I D E N C E OF SA L T I N G / D E - I C I N G AG E N T S IS OB S E R V E D WIT H I N TH E SY S T E M , IT IS BE S T PR A C T I C E FO R TH E SY S T E M TO BE RIN S E D , IN C L U D I N G AB O V E TH E SP R I N G LIN E SO O N AF T E R TH E SP R I N G TH A W AS PA R T OF TH E MA I N T E N A N C E PR O G R A M FO R TH E SY S T E M . MA I N T A I N I N G AN UN D E R G R O U N D DE T E N T I O N OR IN F I L T R A T I O N SY S T E M IS EA S I E S T WH E N TH E R E IS NO FL O W EN T E R I N G TH E SY S T E M . FO R TH I S WE A T H E R . RE A S O N , IT IS A GO O D ID E A TO SC H E D U L E TH E CL E A N O U T DU R I N G DR Y TH E FO R E G O I N G IN S P E C T I O N AN D MA I N T E N A N C E EF F O R T S HE L P EN S U R E UN D E R G R O U N D PI P E SY S T E M S US E D FO R ST O R M W A T E R ST O R A G E CO N T I N U E TO FU N C T I O N AS IN T E N D E D BY ID E N T I F Y I N G RE C O M M E N D E D RE G U L A R IN S P E C T I O N AN D MA I N T E N A N C E PR A C T I C E S . IN S P E C T I O N AN D MA I N T E N A N C E RE L A T E D TO TH E ST R U C T U R A L IN T E G R I T Y OF TH E PI P E OR TH E SC U N D N E S S PA V E D PA R K I N G LO T WA T E R EL E V A T I O N IN DE T E N T I O N SY S T E M FIN I S H E D FU N C T I O N I N G SY S T E M L_ ou m e r c o n r o OF PIP E JO I N T CO N N E C T I O N S IS BE Y O N D TH E SC O P E OF TH I S GU I D E suc h us e . If dsc r e o a n c es be t w e n the su p p l i e d io r m a i o n up o n wi c h a5alt e wo k pro g r e s s e s , ne s e dis c r e p a n c i e s mus t be ro p o r i e d aCo n t e c Ca n t o c h Ww N T E C H EN G I N E E R E D SO L U T I O N S LL C ww w . C o n t e c h E S . c o m 90 2 5 Ce n t r e Po i n t e Dr, Su i t e 40 0 , We s t Ch e s t e r , OH 45 0 6 9 co p s ro ablyor ds r bas s on sin g in c o m e | DA T E RE V I S I O N DE S C R I P T I O N BY 80 0 - 3 3 8 - 1 1 2 2 51 3 - 6 4 5 - 7 0 0 0 51 3 - 6 4 5 - 7 9 8 3 FA X AS A I T E A L L LE A S I= CM P DE T E N T I O N SY S T E M S CO N T E C H DY O D S DR A W I N G DY Q 6 0 4 8 5 Ro s e m e a d Co n d o m i n i u m s Ba s i n B- 1 Ro s e m e a d , CA DE T E N T I O N SY S T E M PR O J E C T No . 42 6 9 4 SE Q No . |D A T E : 60 4 8 5 10 7 2 1 2 0 2 4 DE S I G N E D : DY O DR A W N . DY O CH E C K E D : ov o AP P R O V E D : ov o SH E E T NO . SI T E SP E C I F I C DA T A PR O J E C T NU M B E R 19 4 0 5 3 0 1 6 PR O J E C T NA M E Ro s e m e a d Co n d o s PR O J E C T LO C A T I O N Ro s e m e a d , CA ST R U C T U R E ID TR E A T M E N T RE Q U I R E D TR E A T M E N T FL O W (C F S ) PR E T R E A T M E N T LO A D I N G RA T E (G P M / S F ) 2. 1 GP M / S F WE T L A N D ME D I A LO A D I N G RA T E (G P M / S F ) 1. 0 PE A K BY P A S S RE Q U I R E D (C F S ) — IF AP P L I C A B L E | __ _ _ (C F S ) PIP E DA T A LE . MA T E R I A L DIA M E T E R IN L E T PI P E 1 IN L E T PI P E 2 OU T L E T PI P E PR E T R E A T M E N T | B I O F I L T R A T I O N DIS C H A R G E RI M EL E V A T I O N SU R F A C E LO A D | PE D E S T R I A N NO T E S : * PR E L I M I N A R Y ON L Y - NO T FO R CO N S T R U C T I O N IN S T A L L A T I O N NO T E S 1. 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GR A P H I C SG A L E IN FE E T 0 15 30 7 IN or 60 j= == SC A L E 1" = 30 WH E N PR I N T E D FU L L SI Z E 30 ° x 42 ° RE V I S I O N S Ki m l e y » H o r n © 20 2 5 KIM L E Y - H O R N AN D AS S O C I A T E S , IN C , 41 5 0 W TO W N AN D CO U N T R Y RO A D , S U I T E 70 0 , OR A N G E , CA 28 8 8 PH O N E : 71 4 - 9 3 0 - 1 0 3 0 FA X ; 71 RH A PR O J E C T 19 4 0 5 3 0 1 6 . DE S I N E D BY DR A W N 5Y WH W . K I M L E Y -HO R N CO M cre c k e n av RO S E M E A D RO S E M E A D CO N D O S 16 1 5 WA L N U T GR O V E AV E PR E P A R E D FO R LE W I S MA N A G E M E N T CO R P . PR E L I M I N A R Y UT I L I T Y PL A N SH E E T NU M B E R ATTACHMENT 4 GEOTECHNICAL INVESTIGATION Rosemead Condos | Hydrology & Hydraulics Report Pr o j e c t : 14 0 3 0 0 0 1 En g / G e o l : CC K / M K D Sc a l e Da t e : Ap r i l 20 2 4 Ex p l o r a t i o n Lo c a t i o n Ma p Ho l l o w St e m Au g e r Dr i l l i n g an d In f i l t r a t i o n 15 1 5 Wa l n u t Gr o v e Av e . , Ro s e m e a d CA AR @ Le g e n d N © Ap p r o x i m a t e lo c a t i o n of ho l l o w - s t e m au g e r bo r i n g sh o w i n g to t a l de p t h (T . D . ) @ Ap p r o x i m a t e lo c a t i o n of pe r c o l a t i o n te s t bo r i n g sh o w i n g to t a l de p t h an d de p t h of pe r c o l a t i o n te s t in fe e t be l o w ex i s t i n g gr o u n d su r f a c e (b g s ) Fi g u r e YL ei g h t o n Project Number: Project Name: Earth Description: Liquid Description: Tested By: Time Interval Standard Start Time for Pre-Soak: Start Time for Standard: Standard Time Interval Between Readings, mins: Boring Percolation Test Data Sheet 14030.0010000000 Lewis Rosemead Condos Alluvium Tap water MKD 4/22/2024 4/23/2024 30 9:30 Test Hole Number: Date Excavated: Date Tested: Depth of boring (ft): Radius of boring (in): Radius of casing (in): LB-1 4/22/2024 4/23/2024 30 1 1 Length of slotted of casing (ft): Porosity of Annulus Material, nn: Bentonite Plug at Bottom: Field Percolation Data - Falling Head Test Initial/Final Initial/Final Read - Tine Ink | At (min) ~ "l iy Water Height, | Total Water Infiltrationeading ime ime Interval, min. epth to Ho/H, Drop, Ad (in) | Rate (in /hr.) Water (ft.) :(in.) 1 9:43 12 20.00 120.0 312 1.15 9:55 22.60 88.8 2 9:55 10 22.60 88.8 18.1 1.04 10:05 24.11 70.7 3 10:05 10 24.11 70.7 15.4 1.11 10:15 25.39 55.3 a 10:23 30 20.01 119.9 62.9 1.09 10:53 25.25 57.0 5 10:57 30 20.01 119.9 64.4 1.12 11:27 25.38 55.4 6 11:44 30 20.01 119.9 61.3 1.05 12:14 25.12 58.6 7 12:22 30 20.01 119.9 61.3 1.05 12:52 25.12 58.6 3 1:00 30 20.02 119.8 635 1.10 1:30 25.31 56.3 Reduction Factor for Long Term Siltation, Plugging and Maintenance, RF, = Reduction Factor, RF = RF, + RF, + RF, = Design Infiltration Rate = Measured Infiltration Rate / Reduction Factor (RF) = 0.35 No Measured Infiltration Rate, | (Average of Last 3 Readings) = in./hr. Design Infiltration Rate Reduction Factor from Test Procedure, RF, = Reduction Factor for Site Variability, # of Tests and Investigation, RF, = 1 2 1 1 in./hr. Project Number: Project Name: Earth Description: Liquid Description: Tested By: Time Interval Standard Start Time for Pre-Soak: Start Time for Standard: Standard Time Interval Between Readings, mins: Boring Percolation Test Data Sheet 14030.0010000000 Lewis Rosemead Condos Alluvium Tap water MKD 4/22/2024 4/23/2024 30 8:00 Test Hole Number: Date Excavated: Date Tested: Depth of boring (ft): Radius of boring (in): Radius of casing (in): Length of slotted of casing (ft): Porosity of Annulus Material, nn: Bentonite Plug at Bottom: Field Percolation Data - Falling Head Test LB-2 4/22/2024 4/23/2024 30 1 1 Initial/Final Initial/Final Read - Tine Ink | At (min) ~ "l iy Water Height, | Total Water Infiltrationeading ime ime Interval, min. epth to Ho/H, Drop, Ad (in) | Rate (in /hr.) Water (ft.) :(in.) 1 8:14 30 21.00 108.0 10.8 0.16 8:44 21.90 97.2 2 8:47 30 20.90 109.2 35 0.12 9:17 21.61 100.7 3 9:19 30 20.05 119.4 13.9 0.19 9:49 21.21 105.5 a 9:54 30 20.09 118.9 19.9 0.28 10:24 21.75 99.0 5 10:29 30 20.02 119.8 10.7 0.14 10:59 20.91 109.1 6 11:02 30 20.01 119.9 12.0 0.16 11:32 21.01 107.9 7 11:41 30 20.01 119.9 12.0 0.16 11:11 21.01 107.9 Reduction Factor for Long Term Siltation, Plugging and Maintenance, RF, = Reduction Factor, RF = RF, + RF, + RF, = 0.35 Measured Infiltration Rate, | (Average of Last 3 Readings) = in./hr. Design Infiltration Rate Reduction Factor from Test Procedure, RF, = Reduction Factor for Site Variability, # of Tests and Investigation, RF, = Design Infiltration Rate = Measured Infiltration Rate / Reduction Factor (RF) = 1 2 1 4 in./hr.