251203_42 ERW_Stormwater Report

250903_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment EDA-1 (PERV): Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.13 0.00 2.00 0.28 0.00 3.00 0.43 0.00 4.00 0.60 0.00 5.00 0.79 0.00 6.00 0.98 0.02 7.00 1.21 0.06 8.00 1.49 0.15 9.00 1.83 0.27 10.00 2.28 0.49 11.00 2.99 0.90 12.00 5.52 2.78 13.00 8.53 5.40 14.00 9.24 6.04 15.00 9.69 6.46 16.00 10.03 6.77 17.00 10.31 7.03 18.00 10.54 7.25 19.00 10.73 7.43 20.00 10.92 7.60 21.00 11.09 7.76 22.00 11.24 7.91 23.00 11.39 8.04 24.00 11.52 8.17 25.00 11.52 8.17 26.00 11.52 8.17 27.00 11.52 8.17 28.00 11.52 8.17 29.00 11.52 8.17 30.00 11.52 8.17 31.00 11.52 8.17 32.00 11.52 8.17 33.00 11.52 8.17 34.00 11.52 8.17 35.00 11.52 8.17 36.00 11.52 8.17 37.00 11.52 8.17 38.00 11.52 8.17 39.00 11.52 8.17 40.00 11.52 8.17 41.00 11.52 8.17 42.00 11.52 8.17 43.00 11.52 8.17 44.00 11.52 8.17 45.00 11.52 8.17 46.00 11.52 8.17 47.00 11.52 8.17 48.00 11.52 8.17 49.00 11.52 8.17 50.00 11.52 8.17 51.00 11.52 8.17 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.01 0.06 0.13 0.22 0.34 0.61 1.24 7.07 2.70 1.27 0.88 0.69 0.59 0.47 0.42 0.40 0.37 0.34 0.31 0.29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 52.00 11.52 8.17 53.00 11.52 8.17 54.00 11.52 8.17 55.00 11.52 8.17 56.00 11.52 8.17 57.00 11.52 8.17 58.00 11.52 8.17 59.00 11.52 8.17 60.00 11.52 8.17 61.00 11.52 8.17 62.00 11.52 8.17 63.00 11.52 8.17 64.00 11.52 8.17 65.00 11.52 8.17 66.00 11.52 8.17 67.00 11.52 8.17 68.00 11.52 8.17 69.00 11.52 8.17 70.00 11.52 8.17 71.00 11.52 8.17 72.00 11.52 8.17 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 11/25/2025 Page 30

NOAA 24-hr D 100-Year Rainfall=11.52" 250903_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 11/25/2025 Page 31 Summary for Subcatchment EDA-2 (PERV.): Runoff = 3.70 cfs @ 12.14 hrs, Volume= Routed to Reach DP2-EX : 0.288 af, Depth= 8.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=11.52" Area (ac) 0.423 0.423 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.1 100 0.0410 0.24 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.1 21 0.1050 5.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 7.2 121 Total Subcatchment EDA-2 (PERV.): Hydrograph Runoff 4 3.70 cfs NOAA 24-hr D 100-Year Rainfall=11.52" Runoff Area=0.423 ac Runoff Volume=0.288 af Runoff Depth=8.17" Flow Length=121' Tc=7.2 min CN=74 Flow (cfs) 3 2 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)

250903_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment EDA-2 (PERV.): Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.13 0.00 2.00 0.28 0.00 3.00 0.43 0.00 4.00 0.60 0.00 5.00 0.79 0.00 6.00 0.98 0.02 7.00 1.21 0.06 8.00 1.49 0.15 9.00 1.83 0.27 10.00 2.28 0.49 11.00 2.99 0.90 12.00 5.52 2.78 13.00 8.53 5.40 14.00 9.24 6.04 15.00 9.69 6.46 16.00 10.03 6.77 17.00 10.31 7.03 18.00 10.54 7.25 19.00 10.73 7.43 20.00 10.92 7.60 21.00 11.09 7.76 22.00 11.24 7.91 23.00 11.39 8.04 24.00 11.52 8.17 25.00 11.52 8.17 26.00 11.52 8.17 27.00 11.52 8.17 28.00 11.52 8.17 29.00 11.52 8.17 30.00 11.52 8.17 31.00 11.52 8.17 32.00 11.52 8.17 33.00 11.52 8.17 34.00 11.52 8.17 35.00 11.52 8.17 36.00 11.52 8.17 37.00 11.52 8.17 38.00 11.52 8.17 39.00 11.52 8.17 40.00 11.52 8.17 41.00 11.52 8.17 42.00 11.52 8.17 43.00 11.52 8.17 44.00 11.52 8.17 45.00 11.52 8.17 46.00 11.52 8.17 47.00 11.52 8.17 48.00 11.52 8.17 49.00 11.52 8.17 50.00 11.52 8.17 51.00 11.52 8.17 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.06 0.12 0.24 1.87 0.44 0.22 0.15 0.12 0.10 0.08 0.08 0.07 0.07 0.06 0.06 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 52.00 11.52 8.17 53.00 11.52 8.17 54.00 11.52 8.17 55.00 11.52 8.17 56.00 11.52 8.17 57.00 11.52 8.17 58.00 11.52 8.17 59.00 11.52 8.17 60.00 11.52 8.17 61.00 11.52 8.17 62.00 11.52 8.17 63.00 11.52 8.17 64.00 11.52 8.17 65.00 11.52 8.17 66.00 11.52 8.17 67.00 11.52 8.17 68.00 11.52 8.17 69.00 11.52 8.17 70.00 11.52 8.17 71.00 11.52 8.17 72.00 11.52 8.17 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 11/25/2025 Page 32

250903_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 11/25/2025 Page 33 Summary for Reach DP1-EX: Inflow Area = Inflow = Outflow = 2.669 ac, 11.97% Impervious, Inflow Depth = 8.54" for 100-Year event 18.32 cfs @ 12.20 hrs, Volume= 1.899 af 18.32 cfs @ 12.20 hrs, Volume= 1.899 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach DP1-EX: Flow (cfs) Hydrograph 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Outflow 18.32 cfs 18.32 cfs 0 2 4 Inflow Area=2.669 ac 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)

250903_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Printed 11/25/2025 Page 34 Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Reach DP1-EX: Time (hours) 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00 40.00 41.00 42.00 43.00 44.00 45.00 46.00 47.00 48.00 49.00 50.00 51.00 Inflow Elevation (cfs) (feet) 0.00 0.02 0.04 0.05 0.05 0.07 0.12 0.21 0.32 0.45 0.78 1.55 9.40 3.04 1.44 1.00 0.79 0.67 0.54 0.49 0.45 0.42 0.39 0.36 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Outflow (cfs) 0.00 0.02 0.04 0.05 0.05 0.07 0.12 0.21 0.32 0.45 0.78 1.55 9.40 3.04 1.44 1.00 0.79 0.67 0.54 0.49 0.45 0.42 0.39 0.36 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time (hours) 52.00 53.00 54.00 55.00 56.00 57.00 58.00 59.00 60.00 61.00 62.00 63.00 64.00 65.00 66.00 67.00 68.00 69.00 70.00 71.00 72.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

250903_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 11/25/2025 Page 35 Summary for Reach DP2-EX: Inflow Area = Inflow = Outflow = 0.423 ac, 0.00% Impervious, Inflow Depth = 8.17" for 100-Year event 3.70 cfs @ 12.14 hrs, Volume= 0.288 af 3.70 cfs @ 12.14 hrs, Volume= 0.288 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach DP2-EX: Hydrograph 4 Inflow Outflow 3.70 cfs 3.70 cfs Inflow Area=0.423 ac Flow (cfs) 3 2 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)

250903_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Printed 11/25/2025 Page 36 Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Reach DP2-EX: Time (hours) 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00 40.00 41.00 42.00 43.00 44.00 45.00 46.00 47.00 48.00 49.00 50.00 51.00 Inflow Elevation (cfs) (feet) 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.06 0.12 0.24 1.87 0.44 0.22 0.15 0.12 0.10 0.08 0.08 0.07 0.07 0.06 0.06 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Outflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.06 0.12 0.24 1.87 0.44 0.22 0.15 0.12 0.10 0.08 0.08 0.07 0.07 0.06 0.06 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time (hours) 52.00 53.00 54.00 55.00 56.00 57.00 58.00 59.00 60.00 61.00 62.00 63.00 64.00 65.00 66.00 67.00 68.00 69.00 70.00 71.00 72.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Elevation (feet) Outflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

250903_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC NJ DEP 2-hr WQ Rainfall=1.25" Printed 11/25/2025 Page 37 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment EDA-1 (IMPERV): Runoff Area=13,913 sf 100.00% Impervious Runoff Depth=1.03" Flow Length=275' Tc=2.8 min CN=98 Runoff=0.96 cfs 0.028 af Subcatchment EDA-1 (PERV): Runoff Area=102,351 sf 0.00% Impervious Runoff Depth=0.07" Flow Length=501' Tc=13.1 min CN=74 Runoff=0.28 cfs 0.014 af Subcatchment EDA-2 (PERV.): Runoff Area=0.423 ac 0.00% Impervious Runoff Depth=0.07" Flow Length=121' Tc=7.2 min CN=74 Runoff=0.06 cfs 0.003 af Reach DP1-EX: Inflow=0.96 cfs 0.042 af Outflow=0.96 cfs 0.042 af Reach DP2-EX: Inflow=0.06 cfs 0.003 af Outflow=0.06 cfs 0.003 af Total Runoff Area = 3.092 ac Runoff Volume = 0.045 af Average Runoff Depth = 0.17" 89.67% Pervious = 2.773 ac 10.33% Impervious = 0.319 ac

NJ DEP 2-hr WQ Rainfall=1.25" 250903_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 11/25/2025 Page 38 Summary for Subcatchment EDA-1 (IMPERV): Runoff = 0.96 cfs @ Routed to Reach DP1-EX : 1.05 hrs, Volume= 0.028 af, Depth= 1.03" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 8,137 5,776 13,913 13,913 CN 98 98 98 Description Paved parking, HSG C Roofs, HSG C Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.1 78 0.0150 1.21 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.44" 1.0 12 0.0800 0.20 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.7 185 0.0830 4.64 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 2.8 275 Total Subcatchment EDA-1 (IMPERV): Hydrograph Runoff 1 0.96 cfs Flow (cfs) NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=13,913 sf Runoff Volume=0.028 af Runoff Depth=1.03" Flow Length=275' Tc=2.8 min CN=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)

NJ DEP 2-hr WQ Rainfall=1.25" 250903_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment EDA-1 (IMPERV): Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.63 0.43 2.00 1.25 1.03 3.00 1.25 1.03 4.00 1.25 1.03 5.00 1.25 1.03 6.00 1.25 1.03 7.00 1.25 1.03 8.00 1.25 1.03 9.00 1.25 1.03 10.00 1.25 1.03 11.00 1.25 1.03 12.00 1.25 1.03 13.00 1.25 1.03 14.00 1.25 1.03 15.00 1.25 1.03 16.00 1.25 1.03 17.00 1.25 1.03 18.00 1.25 1.03 19.00 1.25 1.03 20.00 1.25 1.03 21.00 1.25 1.03 22.00 1.25 1.03 23.00 1.25 1.03 24.00 1.25 1.03 25.00 1.25 1.03 26.00 1.25 1.03 27.00 1.25 1.03 28.00 1.25 1.03 29.00 1.25 1.03 30.00 1.25 1.03 31.00 1.25 1.03 32.00 1.25 1.03 33.00 1.25 1.03 34.00 1.25 1.03 35.00 1.25 1.03 36.00 1.25 1.03 37.00 1.25 1.03 38.00 1.25 1.03 39.00 1.25 1.03 40.00 1.25 1.03 41.00 1.25 1.03 42.00 1.25 1.03 43.00 1.25 1.03 44.00 1.25 1.03 45.00 1.25 1.03 46.00 1.25 1.03 47.00 1.25 1.03 48.00 1.25 1.03 49.00 1.25 1.03 50.00 1.25 1.03 51.00 1.25 1.03 Runoff (cfs) 0.00 0.89 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 52.00 1.25 1.03 53.00 1.25 1.03 54.00 1.25 1.03 55.00 1.25 1.03 56.00 1.25 1.03 57.00 1.25 1.03 58.00 1.25 1.03 59.00 1.25 1.03 60.00 1.25 1.03 61.00 1.25 1.03 62.00 1.25 1.03 63.00 1.25 1.03 64.00 1.25 1.03 65.00 1.25 1.03 66.00 1.25 1.03 67.00 1.25 1.03 68.00 1.25 1.03 69.00 1.25 1.03 70.00 1.25 1.03 71.00 1.25 1.03 72.00 1.25 1.03 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 11/25/2025 Page 39