2025 02 Drainage Statement Signed

2025-01 HydroCAD NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Primary Comparison Link 5L 3.22 3.17 cfs cfs Link 6L 3 Primary (cfs) 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

2025-01 HydroCAD NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Primary Comparison

2025-01 HydroCAD NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Primary Comparison 5.16 Link 5L 5.12 cfs cfs Link 6L 5 4 Primary (cfs) 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

2025-01 HydroCAD NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Primary Comparison

2025-01 HydroCAD NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Primary Comparison 10 9.01 cfs Link 5L 8.97 Link 6L 9 8 7 6 Primary (cfs) 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

2025-01 HydroCAD NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a s/n 08640 © 2024 HydroCAD Software Solutions LLC Primary Comparison

STORMWATER COLLECTION SYSTEM CLACULATIONS (PIPE SIZING)

Project: Proposed Popeyes & IHOP Restaurant Computed By: DG Job #: 1021-99-025 Checked By: MJB Location: West Orange, NJ Date: 2/21/2025 Drainage Area Impervious Coefficient Open Space Coefficient Average Coefficient Total Area (SF) Total Area Area (sf) (C) Used (SF) (C) Used (C) Used (acres) Inlet Area #2 1,354 0.95 950 0.35 0.70 2304 0.05 Inlet Area #3 2,016 0.95 352 0.35 0.86 2368 0.05 Inlet Area #4 2,778 0.95 1,635 0.35 0.73 4413 0.10 Inlet Area #5 1,546 0.95 1,218 0.35 0.69 2764 0.06 Inlet Area #6 6,972 0.95 105 0.35 0.94 7077 0.16 Inlet Area #9 500 0.95 176 0.35 0.79 676 0.02 Inlet Area #10 2,863 0.95 260 0.35 0.90 3123 0.07 Inlet Area #11 1,552 0.95 768 0.35 0.75 2320 0.05 Inlet Area #12 6,545 0.95 1,326 0.35 0.85 7871 0.18 Inlet Area #13 872 0.95 65 0.35 0.91 937 0.02 Roof Rear 3,358 0.95 - 0.35 0.95 3358 0.08 Roof Front 2,830 0.95 - 0.35 0.95 2830 0.06

NOTES: Project: Proposed Popeyes & IHOP Restaurant Computed By: DG 1) Design method used is Rational Method, unless otherwise noted. Job #: 1021-99-025 Checked By: MJB 2) Refer to Weighted Runoff Coefficient table Location: West Orange, NJ Date: 2/21/2025 for calculation of incremental areas and C values Design Storm: 25 Year SUBCATCHMENT TIME OF PIPE SECTION INCREMENTAL CUMULATIVE I PEAK RUNOFF PIPING INPUT PIPING DATA AREA CONCENTRATION Tc to Tc in Final Q to Q cum. Pipe Pipe Dia. Length Man. Slope FROM TO Area (Acres) "C" A x C Ac A x C (acres) Inlet Pipe Tc (In/Hr) Inlet for Pipe Capacity Velocity (In) (Ft) "n" (ft/ft) (min) (min.) (min) (CFS) (CFS) (cfs) (fps) Roof Rear Inlet #2 0.08 0.95 0.08 0.08 10.00 0.03 10.00 6.80 0.54 0.54 6 6.0 0.010 0.0100 0.73 3.72 Inlet #2 Inlet #3 0.05 0.70 0.04 0.12 10.00 0.03 10.03 6.80 0.27 0.82 12 15.0 0.013 0.0300 6.17 7.86 Inlet #3 Inlet #4 0.05 0.86 0.04 0.16 10.00 0.14 10.06 6.80

0.27 0.82 12 15.0 0.013 0.0300 6.17 7.86 Inlet #3 Inlet #4 0.05 0.86 0.04 0.16 10.00 0.14 10.06 6.80 0.27 1.09 12 64.0 0.013 0.0300 6.17 7.86 Inlet #4 Inlet #5 0.10 0.73 0.07 0.23 10.00 0.21 10.20 6.80 0.48 1.56 12 81.0 0.013 0.0200 5.04 6.42 Inlet #5 Inlet #6 0.06 0.69 0.04 0.27 10.00 0.37 10.41 6.80 0.27 1.84 12 144.0 0.013 0.0200 5.04 6.42 Roof Front Inlet #9 0.06 0.95 0.06 0.06 10.00 0.03 10.00 6.80 0.41 0.41 6 6.0 0.010 0.0092 0.70 3.57 Inlet #9 Inlet #10 0.02 0.79 0.02 0.08 10.00 0.04 10.03 6.80 0.14 0.54 12 18.0 0.013 0.0250 5.63 7.17 Inlet #10 Inlet #11 0.07 0.90 0.06 0.14 10.00 0.14 10.07 6.80 0.41 0.95 12 59.0 0.013 0.0252 5.65 7.20 Inlet #11 Inlet #12 0.05 0.75 0.04 0.18 10.00 0.24 10.21 6.80 0.27 1.22 12 111.0 0.013 0.0300 6.17 7.86 Inlet #12 Inlet #13 0.18 0.85 0.15 0.33 10.00 0.12 10.45 6.80 1.02 2.24 12 48.0 0.013 0.0200 5.04 6.42 Inlet #13 Inlet #6 0.02 0.91 0.02 0.35 10.00 0.07 10.57 6.68 0.13 2.34 12 26.0 0.013 0.0200 5.04 6.42 Inlet #6 Ex. Inlet 0.16 0.94 0.15 0.77 10.00 0.05 10.78 6.68 1.00 5.14 15 27.0 0.013 0.0300 11.18 9.11