POST DEV NOAA 24-hr D 10 YEAR Rainfall=5.38" Prepared by Professional Design Services Printed 12/31/2025 HydroCAD® 10.20-6a s/n 02223 © 2024 HydroCAD Software Solutions LLC Page 29

Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=Delmarva, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method

Subcatchment1S: POROUS

Subcatchment1S: POROUS Runoff Area=0.570 ac 0.00% Impervious Runoff Depth>0.21" Flow Length=310' Tc=12.9 min CN=39 Runoff=0.03 cfs 0.010 af

Subcatchment2S: IMPERVIOUS

Subcatchment2S: IMPERVIOUS Runoff Area=0.720 ac 100.00% Impervious Runoff Depth>4.66" Flow Length=310' Tc=13.1 min CN=98 Runoff=2.16 cfs 0.280 af

Subcatchment5S: IMPERVIOUS Runoff Area=0.270 ac 100.00% Impervious Runoff Depth>4.66" Flow Length=180' Slope=0.0100'/' Tc=1.6 min CN=98 Runoff=1.48 cfs 0.105 af

Runoff Area=0.190 ac 0.00% Impervious Runoff Depth>0.22" Flow Length=250' Tc=12.4 min CN=39 Runoff=0.01 cfs 0.003 af

Subcatchment6S: POROUS

Subcatchment8S: PROP WAREHOUSE Runoff Area=0.460 ac 100.00% Impervious Runoff Depth>4.66" Flow Length=280' Slope=0.0100'/' Tc=2.6 min CN=98 Runoff=2.35 cfs 0.179 af

Subcatchment10S: BY-PASSPOROUS Runoff Area=0.060 ac 0.00% Impervious Runoff Depth>0.22" Tc=2.0 min CN=39 Runoff=0.00 cfs 0.001 af

Runoff Area=0.070 ac 100.00% Impervious Runoff Depth>4.66" Tc=2.0 min CN=98 Runoff=0.37 cfs 0.027 af

Subcatchment11S: BY-PASS

Inflow=1.00 cfs 0.149 af Outflow=1.00 cfs 0.149 af

Reach 10: COMPOSITE

Pond 3P: SSIB #1 SURFACE BASIN Peak Elev= $ 112.02' $ Storage=5,118 cf Inflow= $ 2.16 $ cfs 0.290 af Discarded=0.10 cfs 0.089 af Primary=0.95 cfs 0.120 af Outflow=1.05 cfs 0.209 af

Pond 8P: SSIB #2 UNDERGROUND Peak Elev=108.89' Storage=0.047 af Inflow=1.48 cfs 0.108 af

Discarded=0.10 cfs 0.088 af Primary=0.00 cfs 0.000 af Outflow=0.10 cfs 0.088 af

Pond 9P: SSIB #3 UNDERGROUND Peak Elev=112.59' Storage=0.087 af Inflow=2.35 cfs 0.179 af Discarded=0.14 cfs 0.127 af Primary=0.00 cfs 0.000 af Outflow=0.14 cfs 0.127 af

Total Runoff Area = 2.340 ac Runoff Volume = 0.605 af Average Runoff Depth = 3.10" 35.04% Pervious = 0.820 ac 64.96% Impervious = 1.520 ac