1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 10-Year-2020 Rainfall=5.38", 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 = 1.20" for 10-Year-2020 event Inflow = 0.79 cfs @ 12.10 hrs, Volume= 0.037 af Primary = 0.79 cfs @ 12.10 hrs, Volume= 0.037 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 0.79 cfs Primary 0.85 0.79 cfs 0.8 Inflow Area=0.373 ac 0.75 0.7 0.65 0.6 0.55 Flow (cfs) 0.5 0.45 0.4 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) 40

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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=5.62" Flow Length=141' Tc=5.9 min CN=74/98 Runoff=2.10 cfs 0.175 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=6.13" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=1.20 cfs 0.090 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=5.53" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=1.05 cfs 0.077 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=3.80" Flow Length=128' Tc=6.0 min CN=74/0 Runoff=0.13 cfs 0.010 af Pond 3: Pervious Pavers Peak Elev=414.86' Storage=879 cf Inflow=1.20 cfs 0.090 af Discarded=0.11 cfs 0.078 af Primary=0.30 cfs 0.011 af Outflow=0.41 cfs 0.090 af Pond 5: Pipes Peak Elev=411.66' Storage=245 cf Inflow=1.11 cfs 0.088 af Discarded=0.03 cfs 0.037 af Primary=0.96 cfs 0.052 af Outflow=0.99 cfs 0.088 af Link 7: Proposed Inflow=1.09 cfs 0.061 af Primary=1.09 cfs 0.061 af Total Runoff Area = 0.746 ac Runoff Volume = 0.351 af Average Runoff Depth = 5.65" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 41

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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 = 2.10 cfs @ 12.13 hrs, Volume= 0.175 af, Depth= 5.62" 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-2020 Rainfall=6.72", 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 42

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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 Runoff 2.10 cfs 2 NOAA 24-hr D 25-Year-2020 Rainfall=6.72" P2=3.47" Runoff Area=16,242 sf Runoff Volume=0.175 af Flow (cfs) Runoff Depth=5.62" 1 Flow Length=141' Tc=5.9 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) 43

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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 = 1.20 cfs @ 12.06 hrs, Volume= 0.090 af, Depth= 6.13" 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-2020 Rainfall=6.72", 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 44

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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 Runoff 1.20 cfs NOAA 24-hr D 25-Year-2020 Rainfall=6.72" 1 P2=3.47" Runoff Area=7,658 sf Runoff Volume=0.090 af Flow (cfs) Runoff Depth=6.13" Flow Length=92' Tc=1.0 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) 45

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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 = 1.05 cfs @ 12.06 hrs, Volume= 0.077 af, Depth= 5.53" 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-2020 Rainfall=6.72", 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 46

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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 Runoff 1.05 cfs 1 NOAA 24-hr D 25-Year-2020 Rainfall=6.72" P2=3.47" Runoff Area=7,266 sf Runoff Volume=0.077 af Flow (cfs) Runoff Depth=5.53" Flow Length=92' Tc=1.0 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) 47

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2020 Rainfall=6.72", 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 = 0.13 cfs @ 12.13 hrs, Volume= 0.010 af, Depth= 3.80" 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-2020 Rainfall=6.72", 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 Runoff 0.14 0.13 cfs 0.13 NOAA 24-hr D 0.12 25-Year-2020 Rainfall=6.72" 0.11 P2=3.47" 0.1 Runoff Area=1,318 sf

P2=3.47" 0.1 Runoff Area=1,318 sf 0.09 Runoff Volume=0.010 af Flow (cfs) 0.08 0.07 Runoff Depth=3.80" 0.06 Flow Length=128' 0.05 Tc=6.0 min 0.04 CN=74/0 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) 48