Report 4 13 2026

Runoff Area=384 sf Runoff Volume=0.004 af Flow (cfs) 0.028 0.026 0.024 Runoff Depth=5.14" 0.022 0.02 Flow Length=65' 0.018 0.016 Slope=0.0600 '/' 0.014 0.012 Tc=6.3 min 0.01 0.008 CN=98 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 Time (hours)

29906 15 Ridgeway West Orange Fina NOAA 24-hr D 100-Year-2020 Rainfall=9.18", P2=3.47" Prepared by Ensurplan Inc Printed 4/20/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 27 Summary for Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Runoff = 0.08 cfs @ 12.13 hrs, Volume= 0.007 af, Depth= 8.94" Routed to Reach 12R : Study Point At Inlet Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-Year-2020 Rainfall=9.18", P2=3.47" Area (sf) CN Description * 384 98 Misc Impervious To Rear Property 384 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 65 0.0600 0.17 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Hydrograph 0.085 0.08 0.08 cfs Runoff 0.075 0.07 NOAA 24-hr D 0.065 100-Year-2020 Rainfall=9.18" 0.06 P2=3.47" 0.055 Runoff Area=384 sf 0.05 Runoff Volume=0.007 af Flow (cfs) 0.045

Runoff Volume=0.007 af Flow (cfs) 0.045 Runoff Depth=8.94" 0.04 0.035 Flow Length=65' 0.03 Slope=0.0600 '/' 0.025 Tc=6.3 min 0.02 CN=98 0.015 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 Time (hours)

29906 15 Ridgeway West Orange Final NOAA 24-hr D 2-Year-2050 Rainfall=4.09", P2=4.09" Prepared by Ensurplan Inc Printed 4/20/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 28 Summary for Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Runoff = 0.03 cfs @ 12.13 hrs, Volume= 0.003 af, Depth= 3.85" Routed to Reach 12R : Study Point At Inlet Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-Year-2050 Rainfall=4.09", P2=4.09" Area (sf) CN Description * 384 98 Misc Impervious To Rear Property 384 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.8 65 0.0600 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 4.09" Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Hydrograph 0.038 0.036 0.03 cfs Runoff 0.034 0.032 NOAA 24-hr D 0.03 2-Year-2050 Rainfall=4.09" 0.028 0.026 P2=4.09" 0.024 Runoff Area=384 sf 0.022 Flow (cfs) 0.02 Runoff Volume=0.003 af

Runoff Area=384 sf 0.022 Flow (cfs) 0.02 Runoff Volume=0.003 af 0.018 Runoff Depth=3.85" 0.016 0.014 Flow Length=65' 0.012 Slope=0.0600 '/' 0.01 0.008 Tc=5.8 min 0.006 CN=98 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 Time (hours)

29906 15 Ridgeway West Orange Final NOAA 24-hr D 10-Year-2050 Rainfall=6.37", P2=4.09" Prepared by Ensurplan Inc Printed 4/20/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 29 Summary for Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Runoff = 0.05 cfs @ 12.13 hrs, Volume= 0.005 af, Depth= 6.13" Routed to Reach 12R : Study Point At Inlet Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-Year-2050 Rainfall=6.37", P2=4.09" Area (sf) CN Description * 384 98 Misc Impervious To Rear Property 384 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.8 65 0.0600 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 4.09" Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Hydrograph 0.06 0.05 cfs Runoff 0.055 0.05 NOAA 24-hr D 0.045 10-Year-2050 Rainfall=6.37" P2=4.09" 0.04 Runoff Area=384 sf 0.035 Runoff Volume=0.005 af Flow (cfs) 0.03

Runoff Volume=0.005 af Flow (cfs) 0.03 Runoff Depth=6.13" 0.025 Flow Length=65' 0.02 Slope=0.0600 '/' 0.015 Tc=5.8 min 0.01 CN=98 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 Time (hours)

29906 15 Ridgeway West Orange Fin NOAA 24-hr D 100-Year-2050 Rainfall=11.52", P2=4.09" Prepared by Ensurplan Inc Printed 4/20/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 30 Summary for Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Runoff = 0.10 cfs @ 12.13 hrs, Volume= 0.008 af, Depth=11.28" Routed to Reach 12R : Study Point At Inlet Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-Year-2050 Rainfall=11.52", P2=4.09" Area (sf) CN Description * 384 98 Misc Impervious To Rear Property 384 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.8 65 0.0600 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 4.09" Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Hydrograph 0.105 0.1 0.10 cfs Runoff 0.095 0.09 NOAA 24-hr D 0.085 100-Year-2050 Rainfall=11.52" 0.08 0.075 P2=4.09" 0.07 Runoff Area=384 sf 0.065 Runoff Volume=0.008 af Flow

Runoff Area=384 sf 0.065 Runoff Volume=0.008 af Flow (cfs) 0.06 0.055 Runoff Depth=11.28" 0.05 0.045 Flow Length=65' 0.04 Slope=0.0600 '/' 0.035 0.03 Tc=5.8 min 0.025 CN=98 0.02 0.015 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 Time (hours)

29906 15 Ridgeway West Orange Final NOAA 24-hr D 2-Year-2020 Rainfall=3.47", P2=3.47" Prepared by Ensurplan Inc Printed 4/20/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 31 Summary for Subcatchment 12S: Proposed Condition To Infiltration System Runoff = 1.30 cfs @ 12.12 hrs, Volume= 0.103 af, Depth= 3.24" Routed to Pond 12P : Infiltration basin Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-Year-2020 Rainfall=3.47", P2=3.47" Area (sf) CN Description * 16,609 98 Impervious to Permeable Pavement 16,609 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 12S: Proposed Condition To Infiltration System Hydrograph 1.30 cfs Runoff NOAA 24-hr D 2-Year-2020 Rainfall=3.47" 1 P2=3.47" Runoff Area=16,609 sf Flow (cfs) Runoff Volume=0.103 af Runoff Depth=3.24" Tc=5.0 min