1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 10-Year-2050 Rainfall=6.37", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Summary for Link 7: Proposed Inflow Area = 0.373 ac, 69.84% Impervious, Inflow Depth = 1.76" for 10-Year-2050 event Inflow = 1.00 cfs @ 12.10 hrs, Volume= 0.055 af Primary = 1.00 cfs @ 12.10 hrs, Volume= 0.055 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Link 7: Proposed Hydrograph Inflow 1.00 cfs Primary 1.00 cfs 1 Inflow Area=0.373 ac Flow (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) 92

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Exisiting Runoff Area=16,242 sf 67.90% Impervious Runoff Depth=6.93" Flow Length=141' Tc=5.5 min CN=74/98 Runoff=2.59 cfs 0.215 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=7.47" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=1.45 cfs 0.109 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=6.83" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=1.30 cfs 0.095 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=5.00" Flow Length=128' Tc=5.5 min CN=74/0 Runoff=0.17 cfs 0.013 af Pond 3: Pervious Pavers Peak Elev=415.10' Storage=1,034 cf Inflow=1.45 cfs 0.109 af Discarded=0.11 cfs 0.088 af Primary=0.59 cfs 0.021 af Outflow=0.70 cfs 0.109 af Pond 5: Pipes Peak Elev=411.96' Storage=336 cf Inflow=1.68 cfs 0.116 af Discarded=0.03 cfs 0.041 af Primary=1.34 cfs 0.075 af Outflow=1.36 cfs 0.116 af Link 7: Proposed Inflow=1.51 cfs 0.088 af Primary=1.51 cfs 0.088 af Total Runoff Area = 0.746 ac Runoff Volume = 0.432 af Average Runoff Depth = 6.96" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 93

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Summary for Subcatchment 1: Exisiting Runoff = 2.59 cfs @ 12.12 hrs, Volume= 0.215 af, Depth= 6.93" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= 0.05 NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Area (sf) CN Description * 2,708 98 Buildings * 758 98 Walks/Steps & Patio 7,562 98 Paved parking, HSG C 5,214 74 >75% Grass cover, Good, HSG C 16,242 90 Weighted Average 5,214 74 32.10% Pervious Area 11,028 98 67.90% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.8 66 0.0680 0.29 Sheet Flow, 1 Grass: Short n= 0.150 P2= 4.09" 1.3 21 0.0950 0.26 Sheet Flow, 2 Grass: Short n= 0.150 P2= 4.09" 0.2 13 0.0390 1.35 Sheet Flow, 3 Smooth surfaces n= 0.011 P2= 4.09" 0.1 13 0.0390 4.01 Shallow Concentrated Flow, 4 Paved Kv= 20.3 fps 0.1 28 0.0360 3.85 Shallow Concentrated Flow, 5 Paved Kv= 20.3 fps 5.5 141 Total 94

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Subcatchment 1: Exisiting Hydrograph Runoff 2.59 cfs NOAA 24-hr D 25-Year-2050 Rainfall=8.08" P2=4.09" 2 Runoff Area=16,242 sf Runoff Volume=0.215 af Flow (cfs) Runoff Depth=6.93" Flow Length=141' 1 Tc=5.5 min CN=74/98 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) 95

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Summary for Subcatchment 2: Parking Lot Runoff = 1.45 cfs @ 12.06 hrs, Volume= 0.109 af, Depth= 7.47" Routed to Pond 3 : Pervious Pavers Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= 0.05 NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Area (sf) CN Description * 6,578 98 PARKING LOT 1,005 74 >75% Grass cover, Good, HSG C * 75 98 REFUSE AREA 7,658 95 Weighted Average 1,005 74 13.12% Pervious Area 6,653 98 86.88% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.1 8 0.0650 1.50 Sheet Flow, 1 Smooth surfaces n= 0.011 P2= 4.09" 0.1 15 0.0670 1.73 Sheet Flow, 2 Smooth surfaces n= 0.011 P2= 4.09" 0.5 59 0.0500 2.02 Sheet Flow, 3 Smooth surfaces n= 0.011 P2= 4.09" 0.2 10 0.0250 1.07 Sheet Flow, 4 Smooth surfaces n= 0.011 P2= 4.09" 0.9 92 Total 96

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Subcatchment 2: Parking Lot Hydrograph Runoff 1.45 cfs NOAA 24-hr D 25-Year-2050 Rainfall=8.08" P2=4.09" Runoff Area=7,658 sf 1 Runoff Volume=0.109 af Flow (cfs) Runoff Depth=7.47" Flow Length=92' Tc=0.9 min CN=74/98 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) 97

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Summary for Subcatchment 4: Proposed Runoff = 1.30 cfs @ 12.06 hrs, Volume= 0.095 af, Depth= 6.83" Routed to Pond 5 : Pipes Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= 0.05 NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Area (sf) CN Description 3,426 98 Roofs, HSG C 1,265 98 Paved parking, HSG C 2,575 74 >75% Grass cover, Good, HSG C 7,266 89 Weighted Average 2,575 74 35.44% Pervious Area 4,691 98 64.56% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.1 8 0.0650 1.50 Sheet Flow, 1 Smooth surfaces n= 0.011 P2= 4.09" 0.1 15 0.0670 1.73 Sheet Flow, 2 Smooth surfaces n= 0.011 P2= 4.09" 0.5 59 0.0500 2.02 Sheet Flow, 3 Smooth surfaces n= 0.011 P2= 4.09" 0.2 10 0.0250 1.07 Sheet Flow, 4 Smooth surfaces n= 0.011 P2= 4.09" 0.9 92 Total 98

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Subcatchment 4: Proposed Hydrograph Runoff 1.30 cfs NOAA 24-hr D 25-Year-2050 Rainfall=8.08" P2=4.09" 1 Runoff Area=7,266 sf Runoff Volume=0.095 af Flow (cfs) Runoff Depth=6.83" Flow Length=92' Tc=0.9 min CN=74/98 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) 99

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Summary for Subcatchment 6: Bypass Runoff = 0.17 cfs @ 12.12 hrs, Volume= 0.013 af, Depth= 5.00" Routed to Link 7 : Proposed Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= 0.05 NOAA 24-hr D 25-Year-2050 Rainfall=8.08", P2=4.09" Area (sf) CN Description 1,318 74 >75% Grass cover, Good, HSG C 1,318 74 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.4 100 0.0650 0.31 Sheet Flow, 1 Grass: Short n= 0.150 P2= 4.09" 0.1 28 0.0900 4.50 Shallow Concentrated Flow, 2 Grassed Waterway Kv= 15.0 fps 5.5 128 Total Subcatchment 6: Bypass Hydrograph 0.19 Runoff 0.18 0.17 cfs 0.17 NOAA 24-hr D 0.16 0.15 25-Year-2050 Rainfall=8.08" 0.14 P2=4.09" 0.13 0.12 Runoff Area=1,318 sf

P2=4.09" 0.13 0.12 Runoff Area=1,318 sf 0.11 Runoff Volume=0.013 af Flow (cfs) 0.1 0.09 Runoff Depth=5.00" 0.08 Flow Length=128' 0.07 0.06 Tc=5.5 min 0.05 CN=74/0 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) 100