complete drainage report rev 9

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 8 Summary for Subcatchment 4i: Imp Runoff = 0.51 cfs @ 1.08 hrs, Volume= Routed to Pond 4FT : 12x6 FT 621 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) 7,201 7,201 Tc (min) 1.2 Length (feet) 100 0.3 90 1.5 190 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0170 1.34 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0510 4.58 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 4i: Imp Hydrograph Runoff 0.55 0.51 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=7,201 sf Runoff Volume=621 cf Runoff Depth=1.03" Flow Length=190' Tc=1.5 min CN=98 0.5 0.45 0.4 Flow (cfs) 0.35 0.3 0.25 0.2 0.15 0.1 0.05 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 9 Summary for Subcatchment 4p: Perv Runoff = 0.15 cfs @ 1.09 hrs, Volume= Routed to Pond 4FT : 12x6 FT 133 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) 9,187 9,187 Tc (min) 1.2 Length (feet) 100 0.3 90 1.5 190 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0170 1.34 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0510 4.58 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 4p: Perv Hydrograph 0.16 Runoff 0.15 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=9,187 sf Runoff Volume=133 cf Runoff Depth=0.17" Flow Length=190' Tc=1.5 min CN=80 0.15 0.14 0.13 0.12 Flow (cfs) 0.11 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 10 Summary for Subcatchment 9i: Imp Runoff = 0.15 cfs @ 1.08 hrs, Volume= Routed to Pond 9FT : 6x4 FT 177 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) 2,050 2,050 Tc (min) 1.2 Length (feet) 100 0.3 77 1.5 177 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0510 4.58 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 9i: Imp Hydrograph 0.16 Runoff 0.15 0.15 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=2,050 sf Runoff Volume=177 cf Runoff Depth=1.03" Flow Length=177' Tc=1.5 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 11 Summary for Subcatchment 9p: Perv Runoff = 0.00 cfs @ 1.09 hrs, Volume= Routed to Pond 9FT : 6x4 FT 4 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) 270 270 Tc (min) 1.2 Length (feet) 100 0.3 77 1.5 177 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0510 4.58 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 9p: Perv Flow (cfs) Hydrograph 0.005 0.005 0.00 cfs 0.004 0.004 0.004 0.004 0.004 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 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=270 sf Runoff Volume=4 cf Runoff Depth=0.17" Flow Length=177' Tc=1.5 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 12 Summary for Subcatchment 10i: Imp Runoff = 0.28 cfs @ 1.08 hrs, Volume= Routed to Pond 10FT : 8x6 FT 336 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) 3,893 3,893 Tc (min) 1.2 Length (feet) 100 0.3 85 1.5 185 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0460 4.35 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 10i: Imp Hydrograph Runoff 0.3 0.28 0.28 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=3,893 sf Runoff Volume=336 cf Runoff Depth=1.03" Flow Length=185' Tc=1.5 min CN=98 0.26 0.24 0.22 Flow (cfs) 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 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 13 Summary for Subcatchment 10p: Perv Runoff = 0.09 cfs @ 1.09 hrs, Volume= Routed to Pond 10FT : 8x6 FT 76 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) 5,247 5,247 Tc (min) 1.2 Length (feet) 100 0.3 85 1.5 185 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0460 4.35 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 10p: Perv Hydrograph 0.095 Runoff 0.09 0.09 cfs 0.085 0.08 0.075 0.07 0.065 Flow (cfs) 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=5,247 sf Runoff Volume=76 cf Runoff Depth=0.17" Flow Length=185' Tc=1.5 min CN=80 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 14 Summary for Subcatchment 11i: Imp Runoff = 0.47 cfs @ 1.08 hrs, Volume= Routed to Pond 11FT : 12x6 FT 576 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) 6,684 6,684 Tc (min) 1.2 Length (feet) 100 0.6 170 1.8 270 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0560 4.80 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 11i: Imp Flow (cfs) Hydrograph 0.52 0.5 0.47 cfs 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 2 4 6 Runoff NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=6,684 sf Runoff Volume=576 cf Runoff Depth=1.03" Flow Length=270' Tc=1.8 min CN=98 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 15 Summary for Subcatchment 11p: Perv Runoff = 0.13 cfs @ 1.09 hrs, Volume= Routed to Pond 11FT : 12x6 FT 117 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) 8,130 8,130 Tc (min) 1.2 Length (feet) 100 0.6 170 1.8 270 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0560 4.80 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 11p: Perv Hydrograph Runoff 0.14 0.13 0.13 cfs NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=8,130 sf Runoff Volume=117 cf Runoff Depth=0.17" Flow Length=270' Tc=1.8 min CN=80 0.12 0.11 0.1 Flow (cfs) 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 16 Summary for Subcatchment 12i: Imp Runoff = 0.19 cfs @ 1.08 hrs, Volume= Routed to Pond 12FT : 6x4 FT 232 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) 2,694 2,694 Tc (min) 1.2 Length (feet) 100 0.6 167 1.8 267 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0580 4.89 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 12i: Imp Flow (cfs) Hydrograph 0.21 0.2 0.19 cfs 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 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 Runoff NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=2,694 sf Runoff Volume=232 cf Runoff Depth=1.03" Flow Length=267' Tc=1.8 min CN=98 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 17 Summary for Subcatchment 12p: Perv Runoff = 0.00 cfs @ 0.00 hrs, Volume= Routed to Pond 12FT : 6x4 FT 0 cf, Depth= 0.00" 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) 0 Tc (min) 1.2 Length (feet) 100 0.6 167 1.8 267 CN 80 Description >75% Grass cover, Good, HSG D Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0580 4.89 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 12p: Perv Hydrograph 1 Runoff Flow (cfs) NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=0 sf Runoff Volume=0 cf Runoff Depth=0.00" Flow Length=267' Tc=1.8 min CN=0 0.00 cfs 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)