Stormwater Management Report Revised as of 01282026 4936 0314 8685 v2

Storm 2-year 10-year 100-year Current-Year-2020 3.47 in 5.38 in 9.18 in Future-Year-2050 4.09 in 6.37 in 11.52 in. The project’s approach for compliance with the regulatory requirements for “quantity control” are set forth at Township Code 25-29.4(s) and Subpart 5.6(b)(2) of the Stormwater Management Regulations (NJAC 7:8), specifically “Demonstrate through hydrologic and hydraulic analysis that there is no increase, as compared to the pre-construction condition, in the peak runoff rates of stormwater leaving the site for the current and projected two-, ten-, and 100-year storm events, as defined and determined pursuant to § 25-29.5c and d, respectively, of this section, and that the increased volume or change in timing of stormwater runoff will not increase flood damage at or downstream of the site. This analysis shall include the analysis of impacts of existing land uses and projected land uses assuming full development under existing zoning and land use ordinances in the drainage area;” As the project is divided into two primary drainage areas with two design points, quantity control considerations are evaluated for each design point. The TR-55 calculations provided in Appendix No. A and Appendix No. B indicate the total peak runoff and total runoff volumes from the subject drainage areas under pre-project and post- project conditions respectively. Tables below provide a summary of the peak runoff rates and total runoff volumes for the regulated storms under existing and proposed conditions for both design points and the overall site, respectively. The following data verifies the project’s compliance with the standards pertaining to “quantity control” as the peak runoff rates for post- project conditions never exceed the pre-project conditions. There is no increase in volume for post-conditions because we were able to maintain drainage areas with the use of roof drains, therefore, we will not increase flood damage at or downstream of the site. Our site currently connects to an existing 72” culvert pipe and a storm sewer system on Sheridan Avenue which will safely convey the runoff and minimize erosion. 6