POST DEV NOAA 24-hr D 25 year Rainfall=6.68" Prepared by Professional Design Services Printed 12/31/2025 HydroCAD® 10.20-6a s/n 02223 © 2024 HydroCAD Software Solutions LLC Page 52

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>0.53" Flow Length=310' Tc=12.9 min CN=39 Runoff=0.11 cfs 0.025 af

Subcatchment2S: IMPERVIOUS

Subcatchment2S: IMPERVIOUS Runoff Area=0.720 ac 100.00% Impervious Runoff Depth>5.81" Flow Length=310' Tc=13.1 min CN=98 Runoff=2.68 cfs 0.349 af

Subcatchment5S: IMPERVIOUS Runoff Area=0.270 ac 100.00% Impervious Runoff Depth>5.82" Flow Length=180' Slope=0.0100'/' Tc=1.6 min CN=98 Runoff=1.84 cfs 0.131 af

Runoff Area=0.190 ac 0.00% Impervious Runoff Depth>0.53"

Subcatchment6S: POROUS

Flow Length=250' Tc=12.4 min CN=39 Runoff=0.04 cfs 0.008 af

Subcatchment8S: PROP WAREHOUSE Runoff Area=0.460 ac 100.00% Impervious Runoff Depth>5.82" Flow Length=280' Slope=0.0100'/' Tc=2.6 min CN=98 Runoff=2.92 cfs 0.223 af

Subcatchment10S: BY-PASS POROUS Runoff Area=0.060 ac 0.00% Impervious Runoff Depth>0.54" Tc=2.0 min CN=39 Runoff=0.02 cfs 0.003 af

Subcatchment11S: BY-PASS Runoff Area=0.070 ac 100.00% Impervious Runoff Depth>5.82" Tc=2.0 min CN=98 Runoff=0.46 cfs 0.034 af

Inflow=1.47 cfs 0.252 af

Outflow=1.47 cfs 0.252 af

Reach 10: COMPOSITE

Pond 3P: SSIB #1 SURFACE BASIN Peak Elev= $ 112.33' $ Storage= $ 6,132 $ cf Inflow= $ 2.75 $ cfs 0.374 af Discarded= $ 0.11 $ cfs 0.093 af Primary= $ 1.30 $ cfs 0.199 af Outflow= $ 1.41 $ cfs 0.291 af

Pond 8P: SSIB #2 UNDERGROUND Peak Elev=109.14' Storage=0.059 af Inflow=1.84 cfs 0.139 af

Discarded=0.11 cfs 0.096 af Primary=0.12 cfs 0.012 af Outflow=0.22 cfs 0.108 af

Pond 9P: SSIB #3 UNDERGROUND Peak Elev=113.06' Storage=0.114 af Inflow=2.92 cfs 0.223 af Discarded=0.15 cfs 0.141 af Primary=0.05 cfs 0.004 af Outflow=0.21 cfs 0.146 af

Total Runoff Area = 2.340 ac Runoff Volume = 0.773 af Average Runoff Depth = 3.97" 35.04% Pervious = 0.820 ac 64.96% Impervious = 1.520 ac