1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 100-Year-2050 Rainfall=11.52", 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 = 5.23" for 100-Year-2050 event Inflow = 2.35 cfs @ 12.12 hrs, Volume= 0.162 af Primary = 2.35 cfs @ 12.12 hrs, Volume= 0.162 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 2.35 cfs Primary 2.35 cfs Inflow Area=0.373 ac 2 Flow (cfs) 1 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) 118

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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=0.73" Flow Length=141' Tc=5.9 min CN=74/98 Runoff=0.72 cfs 0.023 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=0.91" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.46 cfs 0.013 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=0.69" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.33 cfs 0.010 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=0.07" Flow Length=128' Tc=6.0 min CN=74/0 Runoff=0.00 cfs 0.000 af Pond 3: Pervious Pavers Peak Elev=413.90' Storage=256 cf Inflow=0.46 cfs 0.013 af Discarded=0.11 cfs 0.013 af Primary=0.00 cfs 0.000 af Outflow=0.11 cfs 0.013 af Pond 5: Pipes Peak Elev=411.28' Storage=140 cf Inflow=0.33 cfs 0.010 af Discarded=0.03 cfs 0.005 af Primary=0.24 cfs 0.005 af Outflow=0.27 cfs 0.010 af Link 7: Proposed Inflow=0.24 cfs 0.005 af Primary=0.24 cfs 0.005 af Total Runoff Area = 0.746 ac Runoff Volume = 0.046 af Average Runoff Depth = 0.74" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 119

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 = 0.72 cfs @ 1.14 hrs, Volume= 0.023 af, Depth= 0.73" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= 0.05 Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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) 4.1 66 0.0680 0.27 Sheet Flow, 1 Grass: Short n= 0.150 P2= 3.47" 1.4 21 0.0950 0.24 Sheet Flow, 2 Grass: Short n= 0.150 P2= 3.47" 0.2 13 0.0390 1.24 Sheet Flow, 3 Smooth surfaces n= 0.011 P2= 3.47" 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 5.9 141 Total 120

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 0.8 Runoff 0.72 cfs 0.75 0.7 Water Quality Storm 0.65 Water Quality Rainfall=1.25" 0.6 P2=3.47" 0.55 0.5 Runoff Area=16,242 sf Runoff Volume=0.023 af Flow (cfs) 0.45 0.4 Runoff Depth=0.73" 0.35 Flow Length=141' 0.3 Tc=5.9 min 0.25 0.2 CN=74/98 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) 121

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 = 0.46 cfs @ 1.07 hrs, Volume= 0.013 af, Depth= 0.91" 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 Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 1.38 Sheet Flow, 1 Smooth surfaces n= 0.011 P2= 3.47" 0.2 15 0.0670 1.59 Sheet Flow, 2 Smooth surfaces n= 0.011 P2= 3.47" 0.5 59 0.0500 1.86 Sheet Flow, 3 Smooth surfaces n= 0.011 P2= 3.47" 0.2 10 0.0250 0.99 Sheet Flow, 4 Smooth surfaces n= 0.011 P2= 3.47" 1.0 92 Total 122

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 0.52 Runoff 0.50.46 cfs 0.48 0.46 0.44 Water Quality Storm 0.42 Water Quality Rainfall=1.25" 0.4 0.38 P2=3.47" 0.36 0.34 Runoff Area=7,658 sf 0.32 0.3 Runoff Volume=0.013 af Flow (cfs) 0.28 0.26 Runoff Depth=0.91" 0.24 0.22 Flow Length=92' 0.2 0.18 Tc=1.0 min 0.16 0.14 CN=74/98 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) 123

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 = 0.33 cfs @ 1.07 hrs, Volume= 0.010 af, Depth= 0.69" 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 Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 1.38 Sheet Flow, 1 Smooth surfaces n= 0.011 P2= 3.47" 0.2 15 0.0670 1.59 Sheet Flow, 2 Smooth surfaces n= 0.011 P2= 3.47" 0.5 59 0.0500 1.86 Sheet Flow, 3 Smooth surfaces n= 0.011 P2= 3.47" 0.2 10 0.0250 0.99 Sheet Flow, 4 Smooth surfaces n= 0.011 P2= 3.47" 1.0 92 Total 124

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 0.36 Runoff 0.33 cfs 0.34 0.32 Water Quality Storm 0.3 Water Quality Rainfall=1.25" 0.28 0.26 P2=3.47" 0.24 Runoff Area=7,266 sf 0.22 Runoff Volume=0.010 af Flow (cfs) 0.2 0.18 Runoff Depth=0.69" 0.16 Flow Length=92' 0.14 0.12 Tc=1.0 min 0.1 CN=74/98 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) 125

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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 = 0.00 cfs @ 1.25 hrs, Volume= 0.000 af, Depth= 0.07" 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 Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" 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) 5.9 100 0.0650 0.28 Sheet Flow, 1 Grass: Short n= 0.150 P2= 3.47" 0.1 28 0.0900 4.50 Shallow Concentrated Flow, 2 Grassed Waterway Kv= 15.0 fps 6.0 128 Total Subcatchment 6: Bypass Hydrograph 0.0050.00 cfs Runoff 0.005 0.005 0.004 Water Quality Storm 0.004 Water Quality Rainfall=1.25" 0.004 0.004 P2=3.47" 0.004 0.003 Runoff Area=1,318 sf 0.003 0.003

P2=3.47" 0.004 0.003 Runoff Area=1,318 sf 0.003 0.003 Runoff Volume=0.000 af Flow (cfs) 0.003 0.003 Runoff Depth=0.07" 0.002 0.002 Flow Length=128' 0.002 Tc=6.0 min 0.002 0.002 CN=74/0 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) 126