PB 22 10 Altera 769 LLC Filed Application with Exhibits Final Site Plan Phase 2

INLET AREA CALCULATIONS AND STORMWATER COLLECTION SYSTEM CALCULATIONS (PIPE SIZING)

Project: Altera Computed By: SDP Job #: 2530-99-006 Checked By: RJC Location: West Orange, NJ Date: 6/20/2022 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 #300 13398 0.95 2429 0.35 0.86 15827 0.36 Inlet #200 5501 0.95 4462 0.35 0.68 9963 0.23 Inlet #103 9507 0.95 13510 0.35 0.60 23017 0.53 Inlet #105 14495 0.95 4187 0.35 0.82 18682 0.43 Inlet #107 0 0.95 964 0.35 0.35 964 0.02 Inlet #108 0 0.95 1794 0.35 0.35 1794 0.04 Inlet #109 15144 0.95 8681 0.35 0.73 23825 0.55 Inlet #110 0.95 19166 0.35 0.35 19166 0.44 Inlet #111 10468 0.95 470 0.35 0.92 10938 0.25

NOTES: Project: Altera Computed By: SDP 1) Design method used is Rational Method, unless otherwise noted. Job #: 2530-99-006 Checked By: RJC 2) Refer to Weighted Runoff Coefficient table Location: West Orange, NJ Date: 6/20/2022 for calculation of incremental areas and C values Design Storm: 25 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) Inlet #300 Inlet #301 0.36 0.86 0.31 0.31 6.00 0.02 6.00 7.70 2.39 2.39 18 13.0 0.012 0.0200 16.09 9.11 Inlet #200 Manhole #201 0.23 0.68 0.16 0.16 6.00 0.13 6.00 7.70 1.23 1.23 18 49.0 0.012 0.0100 11.38 6.44 Inlet #103 AG

#201 0.23 0.68 0.16 0.16 6.00 0.13 6.00 7.70 1.23 1.23 18 49.0 0.012 0.0100 11.38 6.44 Inlet #103 AG Basin 0.53 0.60 0.32 0.32 13.30 0.02 13.30 6.08 1.95 1.95 18 12.0 0.012 0.0200 16.09 9.11 Inlet #105 AG Basin 0.43 0.82 0.35 1.15 14.70 0.03 19.38 4.88 1.71 5.61 18 14.0 0.012 0.0200 16.09 9.11 Inlet #107 Inlet #105 0.02 0.35 0.01 0.80 6.00 0.08 19.30 4.88 0.05 3.90 18 44.0 0.012 0.0200 16.09 9.11 Inlet #108 Inlet #107 0.04 0.35 0.01 0.79 6.00 0.25 19.05 4.88 0.05 3.86 18 134.0 0.012 0.0200 16.09 9.11 Inlet #109 Inlet #108 0.55 0.73 0.40 0.40 13.30 0.01 13.30 6.08 2.43 2.43 18 7.0 0.012 0.0200 16.09 9.11 Inlet #110 Inlet #108 0.44 0.35 0.15 0.38 18.80 0.25 18.80 4.97 0.75 1.89 18 134.0 0.012 0.0200 16.09 9.11 Inlet #111 Inlet #110 0.25 0.92 0.23 0.23 6.00 0.01 6.00 7.70 1.77 1.77 18 8.0 0.012 0.0200 16.09 9.11

LAND DEVELOPMENT CONSULTING ● PERMITTING GEOTECHNICAL ● ENVIRONMENTAL TRAFFIC● SURVEY● PLANNING & ZONING 245 Main Street, Suite 110 Chester, NJ 07930 T: 908.879.9229 | F: 908.879.0222 Offices conveniently located at: Lake Como, New Jersey ● T: 732.974.0198 Chester, New Jersey ● T: 908.879.9229 Newark, New Jersey ● T: 973.755.7200 Toms River, New Jersey ● T: 732.974.0198 Newtown, Pennsylvania ● T: 267.685.0276 Philadelphia, Pennsylvania ● T: 215.253.4888 Bethlehem, Pennsylvania ● T: 610.598.4400 Allen, Texas ● T: 972.534.2100 Houston, Texas ● T: 281.789.6400 Austin, Texas● T: 512.646.2646 Delray Beach, Florida ●561.921.8570 T: www.dynamicec.com ROBERT J. COLUCCO III JOSEPH C. SPARONE ã

BASIN DRAIN TIME

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