complete drainage report rev 9

dard Offline Filterra HC MTD-22 3,893 5,247 1.30 8'x6' Standard Offline Filterra HC 3,290 Filterra HC Model Size Thank you for the opportunity to present this to you and your client. Please do not hesitate to contact me should you have any additional questions. Sincerely, Taylor Murdock Project Engineer Contech Engineered Solutions, LLC.

VAULT WIDTH VAULT LENGTH INLET SHAPING (NOT BY CONTECH) VAULT LENGTH CLEAN OUT A C B VAULT LENGTH VAULT LENGTH B C VAULT LENGTH A TREE GRATE CURB INLET OPENING CURB (NOT BY CONTECH) SDR 35 OUTLET COUPLING CAST INTO PRECAST VAULT WALL (OUTLET PIPE LOCATION MAY VARY) PLAN VIEW PLAN VIEW ENERGY DISSIPATION ROCKS GALVANIZED ANGLE NOSING CLEAN OUT FRAME AND COVER CAST INTO TOP SLAB STREET 2"Ø IRRIGATION PORT, TYP. 3 PLACES 6" UNDERDRAIN STONE LAYER, TYP. PROVIDED BY CONTECH 3'-4" (3.33') INV. TO TOP TOP SLAB 3" MULCH LAYER, TYP. PROVIDED BY CONTECH 18" FILTERRA MEDIA, TYP. PROVIDED BY CONTECH 6"Ø UNDERDRAIN FLOWKIT PROVIDED BY CONTECH SECTION B-B SECTION A-A SECTION C-C FT-HC LONG SIDE INLET CONFIGURATION DESIGNATION AVAILABILITY FT0604-HC ALL DE, MD, NJ, PA, VA, WV ONLY N/A DE, MD, NJ, PA, VA, WV FT078045-HC FT0804-HC 3'-4" (3.33') INV. TO TOP CURB AND GUTTER (NOT BY CONTECH) SEE FILTERRA STANDARD OFFLINE CURB INLET DETAIL SHEET TREE FRAME AND GRATE CAST INTO TOP SLAB 3'-4" (3.33') INV. TO TOP I:\STORMWATER\COMMOPS\54 FILTERRA\40 STANDARD DRAWINGS\FT-HC - FILTERRA HC (NEW JERSEY ONLY)\FT-HC - FILTERRA OFFLINE CONFIG DTL.DWG 9/8/2022 11:23 AM PLAN VIEW MEDIA BAY SIZE VAULT SIZE (L x W) OUTLET PIPE DIA TREE GRATE QTY & SIZE DESIGNATION AVAILABILITY 6x4 6x4 6" SDR 35 (1) 3' x 3' FT0406-HC 6" SDR 35 (1) 3' x 3' ALL N/A DE, MD, NJ, PA, VA, WV DE, MD, NJ, PA, VA, WV ONLY 7.83 x 4.5 8x4 7.83 x 4.5 FT-HC SQUARE INLET CONFIGURATION FT-HC SHORT SIDE INLET CONFIGURATION FT0408-HC 8x4 6" SDR 35 (1) 3' x 3' FT045078-HC TREE GRATE QTY & SIZE TREE GRATE QTY & SIZE VAULT SIZE (W x L) OUTLET PIPE DIA 4x6 4x6 6" SDR 35 (1) 3' x 3' FT0404-HC ALL 4x4 4x4 6" SDR 35 (1) 3' x 3' 6" SDR 35 (1) 3' x 3' FT0606-HC ALL 6x6 6x6 6" SDR 35 (1) 3' x 3' 4x8 4x8 DESIGNATION AVAILABILITY MEDIA BAY SIZE N/A = NOT AVAILABLE 4.5 x 7.83 4.5 x 7.83 6" SDR 35 (1) 3' x 3' FT0806-HC ALL 8x6 8x6 6" SDR 35 (1) 4' x 4' FT0608-HC ALL 6x8 6x8 6" SDR 35 (1) 4' x 4' FT1006-HC ALL 10 x 6 10 x 6 6" SDR 35 (1) 4' x 4' FT0610-HC ALL 6 x 10 6 x 10 6" SDR 35 (1) 4' x 4' FT1206-HC ALL 12 x 6 12 x 6 6" SDR 35 (2) 4' x 4' FT0612-HC ALL 6 x 12 6 x 12 6" SDR 35 (2) 4' x 4' FT1307-HC ALL 13 x 7 13 x 7 6" SDR 35 (2) 4' x 4' FT0713-HC ALL 7 x 13 7 x 13 6" SDR 35 (2) 4' x

x 6 12 x 6 6" SDR 35 (2) 4' x 4' FT0612-HC ALL 6 x 12 6 x 12 6" SDR 35 (2) 4' x 4' FT1307-HC ALL 13 x 7 13 x 7 6" SDR 35 (2) 4' x 4' FT0713-HC ALL 7 x 13 7 x 13 6" SDR 35 (2) 4' x 4' FT1408-HC CALL CONTECH 14 x 8 14 x 8 6" SDR 35 (2) 4' x 4' N/A = NOT AVAILABLE FT1509-HC CALL CONTECH 15 x 9 15 x 9 6" SDR 35 (2) 4' x 4' FT1608-HC CALL CONTECH 16 x 8 16 x 8 6" SDR 35 (2) 4' x 4' FT1808-HC CALL CONTECH 18 x 8 18 x 8 6" SDR 35 (2) 4' x 4' FT2008-HC CALL CONTECH 20 x 8 20 x 8 6" SDR 35 (3) 4' x 4' FT2208-HC CALL CONTECH 22 x 8 22 x 8 6" SDR 35 (3) 4' x 4' The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions LLC or one of its affiliated companies ("Contech"). Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done at the user's own risk and Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field conditions are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no liability for designs based on missing, incomplete or inaccurate information supplied by others. N/A = NOT AVAILABLE www.ContechES.com THIS PRODUCT MAY BE PROTECTED BY ONE OR MORE OF THE FOLLOWING U.S. PATENTS: 6,277,274; 6,569,321; 7,625,485; 7,425,261; 7,833,412; RELATED FOREIGN PATENTS. INTERNAL PIPE CONFIGURATION MAY VARY DEPENDING UPON OUTLET LOCATION. VAULT OUTLET SIZE PIPE (W x L) DIA MEDIA BAY SIZE 800-338-1122 513-645-7000 513-645-7993 FAX FILTERRA HC OFFLINE (FT-HC) CONFIGURATION DETAIL

1i Imp 1FT 1p 2i Perv Imp 4x4 FT 3i Imp 3FT Imp 9FT 3p 4i Perv Imp Imp 12FT 9p 10i Perv Imp Imp 15FT 12p 13i Perv Imp Imp 18FT 15p 16i Perv Imp Reach Perv 10FT 10p 11i Perv Imp 13FT 16FT 18p 21i Perv Imp 21FT 6x4 FT Pond Link 11p 11FT Perv 12x6 FT 13p 14i Perv Imp 14p 14FT Perv 7.83x4.5 FT 16p 17i Perv Imp 4x4 FT 8x6 FT Subcat 4FT 10x6 FT 4x4 FT 18i 4p 8x6 FT 6x4 FT 15i Perv 12x6 FT 6x4 FT 12i 2FT 4x4 FT 6x4 FT 9i 2p 17p 17FT Perv 8x6 FT 21p 22i Perv Imp 22p 22FT Perv 8x6 FT Routing Diagram for Combined FT (8-22-24) Prepared by Contech Engineered Solutions, Printed 8/26/2024 HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 2 Summary for Subcatchment 1i: Imp Runoff = 0.07 cfs @ 1.10 hrs, Volume= Routed to Pond 1FT : 4x4 FT 83 cf, Depth= 1.03" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 963 963 Tc (min) 5.3 Length (feet) 100 0.1 29 5.4 129 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0850 0.32 Sheet Flow, Grass: Short n= 0.150 P2= 3.47" 0.1000 5.09 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps Total Subcatchment 1i: Imp Hydrograph 0.07 Runoff 0.07 cfs 0.065 0.06 0.055 0.05 Flow (cfs) 0.045 0.04 0.035 0.03 0.025 0.02 0.015 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=963 sf Runoff Volume=83 cf Runoff Depth=1.03" Flow Length=129' Tc=5.4 min CN=98 0.01 0.005 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 3 Summary for Subcatchment 1p: Perv Runoff = 0.04 cfs @ 1.13 hrs, Volume= Routed to Pond 1FT : 4x4 FT 47 cf, Depth= 0.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 3,241 3,241 Tc (min) 5.3 Length (feet) 100 0.1 29 5.4 129 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0850 0.32 Sheet Flow, Grass: Short n= 0.150 P2= 3.47" 0.1000 5.09 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps Total Subcatchment 1p: Perv Flow (cfs) Hydrograph 0.042 0.04 0.04 cfs 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=3,241 sf Runoff Volume=47 cf Runoff Depth=0.17" Flow Length=129' Tc=5.4 min CN=80 Runoff

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 4 Summary for Subcatchment 2i: Imp Runoff = 0.09 cfs @ 1.10 hrs, Volume= Routed to Pond 2FT : 4x4 FT 114 cf, Depth= 1.03" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 1,325 1,325 Tc (min) 5.3 Length (feet) 100 0.1 35 5.4 135 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0850 0.32 Sheet Flow, Grass: Short n= 0.150 P2= 3.47" 0.0860 4.72 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps Total Subcatchment 2i: Imp Hydrograph 0.1 Runoff 0.095 0.09 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=1,325 sf Runoff Volume=114 cf Runoff Depth=1.03" Flow Length=135' Tc=5.4 min CN=98 0.09 0.085 0.08 0.075 Flow (cfs) 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 5 Summary for Subcatchment 2p: Perv Runoff = 0.02 cfs @ 1.13 hrs, Volume= Routed to Pond 2FT : 4x4 FT 22 cf, Depth= 0.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 1,537 1,537 Tc (min) 5.3 Length (feet) 100 0.1 35 5.4 135 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0850 0.32 Sheet Flow, Grass: Short n= 0.150 P2= 3.47" 0.0860 4.72 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps Total Subcatchment 2p: Perv Hydrograph 0.02 Runoff 0.019 0.02 cfs 0.018 0.017 0.016 0.015 Flow (cfs) 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=1,537 sf Runoff Volume=22 cf Runoff Depth=0.17" Flow Length=135' Tc=5.4 min CN=80 0.003 0.002 0.001 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 6 Summary for Subcatchment 3i: Imp Runoff = 0.14 cfs @ 1.08 hrs, Volume= Routed to Pond 3FT : 6x4 FT 173 cf, Depth= 1.03" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 2,008 2,008 Tc (min) 0.7 Length (feet) 100 0.0 15 0.7 115 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0680 2.34 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.1170 6.94 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 3i: Imp Hydrograph Runoff 0.15 0.14 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=2,008 sf Runoff Volume=173 cf Runoff Depth=1.03" Flow Length=115' Tc=0.7 min CN=98 0.14 0.13 0.12 0.11 Flow (cfs) 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 7 Summary for Subcatchment 3p: Perv Runoff = 0.02 cfs @ 1.08 hrs, Volume= Routed to Pond 3FT : 6x4 FT 20 cf, Depth= 0.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 1,368 1,368 Tc (min) 0.7 Length (feet) 100 0.0 15 0.7 115 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0680 2.34 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.1170 6.94 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 3p: Perv Flow (cfs) Hydrograph 0.025 0.024 0.02 cfs 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=1,368 sf Runoff Volume=20 cf Runoff Depth=0.17" Flow Length=115' Tc=0.7 min CN=80 Runoff