12 2026 02 12 Crestmont CC Stormwater Management Report

control structures within the conveyance system analysis. Detailed design calculations for the stormwater conveyance system are included in Appendix D of this report. 4.0 SOIL EROSION AND SEDIMENT CONTROL Soil erosion and sediment control measures have been designed and located within the project site to minimize the amount of sediment carried by stormwater runoff, both during and after construction of the project. The SESC design was completed in accordance with the New Jersey Standards for Soil Erosion and Sediment Control. 5.0 STORMWATER MAINTENANCE PLAN The stormwater management systems for the proposed development area are intended to collect, convey, and detain the stormwater runoff. Regular maintenance procedures are required to verify the consistent and proper operation of the stormwater management facilities and prevent problems and malfunctions. The maintenance program provides the stormwater maintenance procedures for the site, which can be found under separate cover. 6.0 CONCLUSION The stormwater management systems have been designed so that the post-construction peak runoff rates meet the required peak rate reductions for the 2-, 10-, and 100-year design storm events for each point of analysis. The proposed small-scale bioretention basins and porous asphalt pavement system have been designed in accordance with the BMP Manual in order to achieve the required quantity control for the 2-, 10-, and 100-year design storm events, while simultaneously providing 80% or 90% TSS removal for water quality treatment. The proposed stormwater conveyance systems have been designed to safely and effectively convey the runoff generated from the 25-year design storm event. Therefore, the engineering design of the stormwater management systems has been performed in accordance with and meets the regulations specified under the Township of West Orange Code of Ordinances, NJDOT, and the NJDEP stormwater rules. 7.0 REFERENCES 1. Hydrology Studio. Hydrology Studio 2026 v 3.0.0.39. 2. Hydrology Studio. Stormwater Studio 2026 v 3.0.0.40. 3. Hydrology Studio. Studio Express 2026 v 1.0.0.20. 21