POST DEV NOAA 24-hr D 2 YEAR Rainfall=3.42" Prepared by Professional Design Services Printed 12/31/2025 HydroCAD® 10.20-6a s/n 02223 © 2024 HydroCAD Software Solutions LLC Page 6

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>0.00" Flow Length=310' Tc=12.9 min CN=39 Runoff=0.00 cfs 0.000 af

Runoff Area=0.720 ac 100.00% Impervious Runoff Depth>2.91"

Subcatchment2S: IMPERVIOUS

Runoff Area=0.720 ac 100.00% Impervious Runoff Depth>2.91" Flow Length=310' Tc=13.1 min CN=98 Runoff=1.36 cfs 0.175 af

Subcatchment5S: IMPERVIOUS Runoff Area=0.270 ac 100.00% Impervious Runoff Depth>2.92" Flow Length=180' Slope=0.0100'/' Tc=1.6 min CN=98 Runoff=0.93 cfs 0.066 af

Subcatchment6S: POROUS

Subcatchment6S: POROUS Runoff Area=0.190 ac 0.00% Impervious Runoff Depth>0.00"

Flow Length=250' Tc=12.4 min CN=39 Runoff=0.00 cfs 0.000 af

Subcatchment8S: PROP WAREHOUSE Runoff Area=0.460 ac 100.00% Impervious Runoff Depth>2.92" Flow Length=280' Slope=0.0100'/' Tc=2.6 min CN=98 Runoff=1.48 cfs 0.112 af

Runoff Area=0.060 ac 0.00% Impervious Runoff Depth>0.00" Tc=2.0 min CN=39 Runoff=0.00 cfs 0.000 af

Subcatchment10S: BY-PASS POROUS

Runoff Area=0.070 ac 100.00% Impervious Runoff Depth>2.92" Tc=2.0 min CN=98 Runoff=0.24 cfs 0.017 af

Subcatchment11S: BY-PASS

Inflow=0.24 cfs 0.040 af

Outflow=0.24 cfs 0.040 af

Reach 10: COMPOSITE

Pond 3P: SSIB #1 SURFACE BASIN Peak Elevation=111.65' Storage=3,983 cfs Inflow=1.36 cfs 0.175 af Discarded=0.09 cfs 0.081 af Primary=0.19 cfs 0.023 af Outflow=0.28 cfs 0.104 af

Pond 8P: SSIB #2 UNDERGROUND Peak Elev=108.37' Storage=0.025 af Inflow=0.93 cfs 0.066 af

Discarded=0.09 cfs 0.065 af Primary=0.00 cfs 0.000 af Outflow=0.09 cfs 0.065 af

Pond 9P: SSIB #3 UNDERGROUND Peak Elev=111.92' Storage=0.047 af Inflow=1.48 cfs 0.112 af Discarded=0.12 cfs 0.102 af Primary=0.00 cfs 0.000 af Outflow=0.12 cfs 0.102 af

Total Runoff Area = 2.340 ac Runoff Volume = 0.369 af Average Runoff Depth = 1.89" 35.04% Pervious = 0.820 ac 64.96% Impervious = 1.520 ac