1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 100-Year-2020 Rainfall=9.18", 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 Link 7: Proposed Inflow Area = 0.373 ac, 69.84% Impervious, Inflow Depth = 3.57" for 100-Year-2020 event Inflow = 1.80 cfs @ 12.12 hrs, Volume= 0.111 af Primary = 1.80 cfs @ 12.12 hrs, Volume= 0.111 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 1.80 cfs Primary 1.80 cfs Inflow Area=0.373 ac 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) 66

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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=3.15" Flow Length=141' Tc=5.5 min CN=74/98 Runoff=1.19 cfs 0.098 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=3.57" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=0.70 cfs 0.052 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=3.08" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=0.59 cfs 0.043 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=1.66" Flow Length=128' Tc=5.5 min CN=74/0 Runoff=0.06 cfs 0.004 af Pond 3: Pervious Pavers Peak Elev=414.28' Storage=503 cf Inflow=0.70 cfs 0.052 af Discarded=0.11 cfs 0.052 af Primary=0.00 cfs 0.000 af Outflow=0.11 cfs 0.052 af Pond 5: Pipes Peak Elev=411.42' Storage=176 cf Inflow=0.59 cfs 0.043 af Discarded=0.03 cfs 0.026 af Primary=0.50 cfs 0.017 af Outflow=0.53 cfs 0.043 af Link 7: Proposed Inflow=0.56 cfs 0.021 af Primary=0.56 cfs 0.021 af Total Runoff Area = 0.746 ac Runoff Volume = 0.197 af Average Runoff Depth = 3.17" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 67

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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 = 1.19 cfs @ 12.12 hrs, Volume= 0.098 af, Depth= 3.15" 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 2-Year-2050 Rainfall=4.09", 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 68

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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 1.19 cfs NOAA 24-hr D 2-Year-2050 Rainfall=4.09" 1 P2=4.09" Runoff Area=16,242 sf Runoff Volume=0.098 af Flow (cfs) Runoff Depth=3.15" Flow Length=141' 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) 69

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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 = 0.70 cfs @ 12.06 hrs, Volume= 0.052 af, Depth= 3.57" 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 2-Year-2050 Rainfall=4.09", 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 70

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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 0.75 0.70 cfs 0.7 NOAA 24-hr D 0.65 2-Year-2050 Rainfall=4.09" 0.6 0.55 P2=4.09" 0.5 Runoff Area=7,658 sf 0.45 Runoff Volume=0.052 af Flow (cfs) 0.4 Runoff Depth=3.57" 0.35 0.3 Flow Length=92' 0.25 Tc=0.9 min 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) 71

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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 = 0.59 cfs @ 12.06 hrs, Volume= 0.043 af, Depth= 3.08" 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 2-Year-2050 Rainfall=4.09", 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 72

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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 0.65 Runoff 0.59 cfs 0.6 NOAA 24-hr D 0.55 2-Year-2050 Rainfall=4.09" 0.5 0.45 P2=4.09" 0.4 Runoff Area=7,266 sf Runoff Volume=0.043 af Flow (cfs) 0.35 0.3 Runoff Depth=3.08" 0.25 Flow Length=92' 0.2 Tc=0.9 min 0.15 CN=74/98 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) 73

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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 = 0.06 cfs @ 12.13 hrs, Volume= 0.004 af, Depth= 1.66" 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 2-Year-2050 Rainfall=4.09", 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 Runoff 0.06 cfs 0.06 0.055 NOAA 24-hr D 0.05 2-Year-2050 Rainfall=4.09" 0.045 P2=4.09" 0.04

l=4.09" 0.045 P2=4.09" 0.04 Runoff Area=1,318 sf Runoff Volume=0.004 af Flow (cfs) 0.035 0.03 Runoff Depth=1.66" 0.025 Flow Length=128' 0.02 Tc=5.5 min 0.015 CN=74/0 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) 74