Drainage Statement 07 2025 submission

PIPE SIZING

NOTES: Project: Mavis Tire Supply, LLC Computed By: KED 1) Design method used is Rational Method, unless otherwise noted. Job #: 1956-24-04187 Checked By: CAM 2) Refer to Weighted Runoff Coefficient table Location: West Orange Township Date: 7/3/2025 for calculation of incremental areas and C values Design Storm: 25 yr SUBCATCHMENT TIME OF PIPE SECTION INCREMENTAL CUMULATIVE I PEAK RUNOFF PIPING INPUT PIPING DATA AREA CONCENTRATION Tc to Tc in Q cum. Pipe Pipe Final Tc Q to Inlet Dia. Length Man. Slope FROM TO Area (Acres) "C" A x C Ac A x C (acres) Inlet Pipe (In/Hr) for Pipe Capacity Velocity (min) (CFS) (In) (Ft) "n" (ft/ft) (min) (min.) (CFS) (cfs) (fps) Storm Str. 6 Prop. MH 1 0.12 0.81 0.10 0.23 6.00 0.09 6.12 7.70 0.77 1.77 12 38.0 0.013 0.0250

6 Prop. MH 1 0.12 0.81 0.10 0.23 6.00 0.09 6.12 7.70 0.77 1.77 12 38.0 0.013 0.0250 5.63 7.17 Storm Str. 5 Prop. MH 1 0.11 0.92 0.10 0.10 6.00 0.25 6.00 7.70 0.77 0.77 15 60.0 0.012 0.0050 4.95 4.04 Storm Str. 7 Prop. MH 1 0.06 0.68 0.04 0.04 6.00 0.14 6.00 7.70 0.31 0.31 15 35.0 0.012 0.0050 4.95 4.04 Prop. MH 1 Storm Str. 2 0.00 0.00 0.00 0.37 6.00 0.52 6.25 7.70 0.00 2.85 12 108.0 0.012 0.0050 2.73 3.48 Storm Str. 2 Storm Str. 3 0.01 0.95 0.01 0.38 6.00 0.10 6.77 7.59 0.08 2.88 15 15.0 0.012 0.0020 3.13 2.55 Stm Str. 1 & DA1 Storm Str. 3 0.18 0.69 0.12 0.12 6.00 0.26 6.00 7.70 0.92 0.92 15 63.0 0.012 0.0050 4.95 4.04 Storm Str. 3 Existing MH 0.00 0.35 0.00 0.51 6.00 0.26 6.87 7.59 0.00 3.87 15 97.0 0.013 0.0140 7.64 6.23 Roof Area Existing MH 0.16 0.95 0.15 0.15 6.00 0.45 6.00 7.70 1.16 1.16 12 93.0 0.012 0.0050 2.73 3.48 Prop. MH 2 End* 0.00 0.00 0.00 0.00 6.00 0.05 6.00 7.70 0.00 0.00 15 20.0 0.013 0.0140 7.64 6.23 Offsite Q** Storm Str. 6 0.16 0.80 0.13 0.13 6.00 0.12 6.00 7.70 1.00 1.00 6 30.0 0.014 0.0250 0.82 4.18 *This pipe sizing calculation assumes downstream pipe capacity is limited to the capacity of the

00 6 30.0 0.014 0.0250 0.82 4.18 *This pipe sizing calculation assumes downstream pipe capacity is limited to the capacity of the prior segment under existing conditions. **This flow has been calculated to provide the conservate flow generated from off-site conditons. (1.0 CFS)

EXISTING INLET DRAINAGE AREA MAP

INLET AREA STORM STRUCTURE #2 AREA: 2,690 SF (0.06 Ac) INLET AREA STORM STRUCTURE #3 AREA: 4,450 SF (0.1 Ac) INLET AREA STORM STRUCTURE #1 AREA: 11,925 SF (0.27 Ac) ROOF AREA AREA: 3,334 SF (0.08 Ac) INLET AREA STORM STRUCTURE #4 AREA: 6,015 SF (0.14 Ac) INLET AREA STORM STRUCTURE #5 AREA: 2,920 SF (0.07 Ac) 5 Greentree Centre, Suite 406 Marlton, NJ 08053 T: 856.334.2000 F: 732.974.3521 www.dynamicec.com ● PERMITTING ● LAND DEVELOPMENT CONSULTING GEOTECHNICAL ● ENVIRONMENTAL ● SURVEY ● PLANNING & ZONING Offices conveniently located throughout the

VEY ● PLANNING & ZONING Offices conveniently located throughout the United States: New Jersey | Delaware | Florida | Maryland | Pennsylvania | Texas RODMAN R. RITCHIEROBERT P. FREUD ã

PROPOSED INLET DRAINAGE AREA MAP

INLET AREA STORM STRUCTURE #4 AREA: 685 SF (0.02 Ac) EXISTING MH INLET AREA STORM STRUCTURE #3 AREA: 210 SF INLET AREA STORM STRUCTURE #2 AREA: 515 SF (0.01 Ac) INLET AREA STORM STRUCTURE #1 AREA: 2,525 SF (0.06 Ac) ROOF AREA AREA: 6,952 SF (0.16 Ac) DRAINAGE AREA 1 (OFFSITE) AREA: 5,485 SF (0.13 Ac) PROP. MH #1 INLET AREA STORM STRUCTURE #5 AREA: 4,940 SF (0.11 Ac) INLET AREA STORM STRUCTURE #7 AREA: 2,700 SF (0.06 Ac) INLET AREA STORM STRUCTURE #6 AREA: 5,405 SF (0.12 Ac) 5 Greentree Centre, Suite 406 Marlton, NJ 08053 T: 856.334.2000

T: 856.334.2000 F: 732.974.3521 www.dynamicec.com ● PERMITTING ● LAND DEVELOPMENT CONSULTING GEOTECHNICAL ● ENVIRONMENTAL ● SURVEY ● PLANNING & ZONING Offices conveniently located throughout the United States: New Jersey | Delaware | Florida | Maryland | Pennsylvania | Texas RODMAN R. RITCHIEROBERT P. FREUD ã