Report 4 13 2026

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

pth=3.24" Tc=5.0 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 Time (hours)