2025 08 15 WEH SWM CME Memo

Chairman and Members of the West Orange Township Planning Board August 15, 2025 Re: West Essex Highlands, LLC (PB 24-01) Our File No. 115.WRP0179.V01 Response To Objector’s Stormwater Management System Review Page 3 approximately 120.429 acres. The property is currently vacant and wooded and is traversed by several stream corridors. Development of the property is subject to the terms and conditions in a Settlement of Litigation Agreement between West Essex Highlands, LLC, the Township of West Orange and the West Essex Condominium Association, Inc. The Applicant is seeking Preliminary and Final Site Plan approval to construct a residential development containing 496 residential apartments, 100 of which will be set aside for low and moderate income families. The Applicant proposes to construct six (6) apartment buildings, a clubhouse, a maintenance building, a dog kennel and a dog park. The proposed stormwater management design for the development includes one (1) large scale surface infiltration basin with a manufactured treatment device, three (3) small scale surface infiltration basins, seven (7) porous pavement infiltration systems and one (1) small scale subsurface infiltration basin. The proposed development will result in the disturbance of more than one acre. As a result, it is classified as a Major Development and is subject to the applicable stormwater management requirements set forth in the New Jersey Stormwater Management Rules (N.J.A.C. 7:8) as well as Section 25-29.4 of the Township Ordinance. Our office notes that the proposed development has been reviewed by NJDEP and has received an NJDEP Permit which granted a Flood Hazard Area Individual Permit, Freshwater Wetlands General Permit 10B, Freshwater Wetlands General Permit 11, Freshwater Wetlands General Permit 17, and a Water Quality Certificate, dated November 15, 2024. B. OBJECTOR’S STORMWATER MANAGEMENT SYSTEM REVIEW SUMMARY At the request of the project objectors, We Care NJ Corp., Sean Walsh, PE with Princeton Hydro, LLC completed a technical review of the proposed stormwater management design and prepared a Stormwater Management Review for Municipal Board Approval dated March 10, 2025 to outline the objector’s concerns regarding stormwater management. Based on our review, we have the following to offer for Board consideration. For clarity purposes, review comments taken from the

25 to outline the objector’s concerns regarding stormwater management. Based on our review, we have the following to offer for Board consideration. For clarity purposes, review comments taken from the Stormwater Management Review for Municipal Board Approval prepared by Sean Walsh, PE with Princeton Hydro, LLC, dated March 10, 2025, are shown in italics with comments from our office shown in bold. Stormwater Management Review for Municipal Board Approval prepared by Sean Walsh, PE with Princeton Hydro, LLC, dated March 10, 2025: 1.0 Introduction: Informational/Opinion. No comment needed. 2.0 Stormwater Management: Informational/Opinion. No comment needed. S:\West Orange\Planning Board\VWRP0179.01 - West Essex Highlands, Inc\2025-08-15 - WEH - SWM Memo.docx