1240815StormWaterManagementReportrcd 3 12 2026

2 1 Parking Lot 3 Exisiting 4 Pervious Pavers Proposed 5 6 Pipes Bypass 7 Proposed Subcat Reach Pond Link Routing Diagram for 1240815-pipes3-C Prepared by Casey & Keller, Inc, Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC 14

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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=2.59" Flow Length=141' Tc=5.9 min CN=74/98 Runoff=0.97 cfs 0.080 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=2.97" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.59 cfs 0.044 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=2.52" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.48 cfs 0.035 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=1.22" Flow Length=128' Tc=6.0 min CN=74/0 Runoff=0.04 cfs 0.003 af Pond 3: Pervious Pavers Peak Elev=414.07' Storage=369 cf Inflow=0.59 cfs 0.044 af Discarded=0.11 cfs 0.044 af Primary=0.00 cfs 0.000 af Outflow=0.11 cfs 0.044 af Pond 5: Pipes Peak Elev=411.37' Storage=163 cf Inflow=0.48 cfs 0.035 af Discarded=0.03 cfs 0.023 af Primary=0.41 cfs 0.012 af Outflow=0.43 cfs 0.035 af Link 7: Proposed Inflow=0.44 cfs 0.015 af Primary=0.44 cfs 0.015 af Total Runoff Area = 0.746 ac Runoff Volume = 0.162 af Average Runoff Depth = 2.61" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 15

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 = 0.97 cfs @ 12.13 hrs, Volume= 0.080 af, Depth= 2.59" 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-2020 Rainfall=3.47", 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 16

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 0.97 cfs 1 NOAA 24-hr D 2-Year-2020 Rainfall=3.47" P2=3.47" Runoff Area=16,242 sf Runoff Volume=0.080 af Flow (cfs) Runoff Depth=2.59" 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) 17

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 = 0.59 cfs @ 12.06 hrs, Volume= 0.044 af, Depth= 2.97" 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-2020 Rainfall=3.47", 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 18

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 0.65 Runoff 0.59 cfs 0.6 NOAA 24-hr D 0.55 2-Year-2020 Rainfall=3.47" 0.5 P2=3.47" 0.45 0.4 Runoff Area=7,658 sf Runoff Volume=0.044 af Flow (cfs) 0.35 0.3 Runoff Depth=2.97" 0.25 Flow Length=92' 0.2 Tc=1.0 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) 19

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 = 0.48 cfs @ 12.06 hrs, Volume= 0.035 af, Depth= 2.52" 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-2020 Rainfall=3.47", 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 20

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 0.48 cfs 0.5 NOAA 24-hr D 0.45 2-Year-2020 Rainfall=3.47" 0.4 P2=3.47" 0.35 Runoff Area=7,266 sf Runoff Volume=0.035 af Flow (cfs) 0.3 0.25 Runoff Depth=2.52" 0.2 Flow Length=92' Tc=1.0 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) 21

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 = 0.04 cfs @ 12.14 hrs, Volume= 0.003 af, Depth= 1.22" 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-2020 Rainfall=3.47", 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 0.046 Runoff 0.044 0.04 cfs 0.042 0.04 NOAA 24-hr D 0.038 0.036 2-Year-2020 Rainfall=3.47" 0.034 0.032 P2=3.47" 0.03 0.028

P2=3.47" 0.03 0.028 Runoff Area=1,318 sf Runoff Volume=0.003 af Flow (cfs) 0.026 0.024 0.022 Runoff Depth=1.22" 0.02 0.018 Flow Length=128' 0.016 0.014 Tc=6.0 min 0.012 0.01 CN=74/0 0.008 0.006 0.004 0.002 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) 22