05 Stormwater Statementrcd 10 14 24

Stormwater Management Statement Proposed Site Improvements Township of West Orange, New Jersey October 8, 2024 TABLE 3: STORMWATER PEAK DISCHARGE Storm Event Pre-Development Peak Discharge Post-Development Peak Discharge Rate of Reduction 2-Year 0.68 CFS 0.68 CFS 0.00% 10-Year 1.07 CFS 1.06 CFS 0.94% 100-Year 1.83 CFS 1.82 CFS 0.55% TABLE 4: STORMWATER DISCHARGE VOLUME Storm Event Pre-Development Volume Post-Development Volume Volume Reduction 2-Year 2,425 CF 2,396 CF 29 CF 10-Year 3,852 CF 3,816 CF 36 CF 100-Year 6,660 CF 6,617 CF 43 CF No adverse impacts to the municipal drainage system or adjacent properties are anticipated as a result of the project. Detailed hydrologic calculations and mapping can be found in the Appendix of this Statement. Prepared by: Afton Savitz, PE NJ PE License No. 57674 Stonefield Engineering and Design, LLC