CME Associates Review 3

—=—_ Che Consulting & Municipal ASSOCIATES ENGINEERS Chairman and Members of the West Orange Township Planning Board June 13, 2025 Re: West Essex Highlands, LLC (PB 24-01) Our File No. 115.WRPO179.V01 Preliminary & Final Site Plan - Review #3 Page 7 General Permit 11, Freshwater Wetlands General Permit 17, and a Water Quality Certificate. 2. Based on our review of the provided soil testing and Chapter 12 of the BMP Manual, we offer the following: a. One (1) additional soil test is required for BMP #4 as TP-10 is located further than 25 feet from the porous pavement system. b. One (1) additional soil test is required for BMP #6. c. Two (2) additional soil tests are required for BMP #7. d. One (1) additional soil test is required for BMP #8. e. One (1) additional soil test is required for BMP #10. Our office defers to NJDEP to confirm compliance with Chapter 12 of the BMP Manual regarding the quantity of soil tests. 3. The plans should be revised to include notation indicating that soil testing during construction and post construction will be performed for all infiltration BMPs in accordance with the NJDEP BMP Manual. 4. The Stormwater Management Report hydrographs indicate that the replacement soil and exfiltration rate used for porous pavement system #3 and porous pavement system #8 are 10 inches per hour. The porous pavement system details on Sheet SP-25 and Sheet SP- 26 indicate replacement soil with a permeability rate of 8 inches per hour should be used. The details must be revised to indicate replacement soil with a permeability rate of 10 inches per hour will be used. 5. Verify the size of pipes connected to outlet structure #6 as they are inconsistent between the outlet control structure label, the pipe labels, and the details. Sheet SP-19 and the details on Sheet SP-25 must be revised accordingly. 6. Verify the size of the pipes associated with outlet control structure #8 as they are inconsistent between the outlet control structure label, pipe labels, and detail. Sheet SP- 22 and the detail on Sheet SP-26 shall be revised accordingly. Further the outlet control structure #8 detail should be revised to show the 15” HDPE pipe from inlet W-9. 7. Revise outlet structure #9 detail on Sheet SP-26 to show both 15” pipes that connect into the structure. Further, verify the sizes and material of the inlet pipes and outlet pipe as they are

W-9. 7. Revise outlet structure #9 detail on Sheet SP-26 to show both 15” pipes that connect into the structure. Further, verify the sizes and material of the inlet pipes and outlet pipe as they are inconsistent between the outlet control structure label, pipe labels, and detail. Sheet SP-23 and the detail on sheet SP-26 must be revised accordingly. S:\West Orange\Pianning Boardi\VWRPO179.01 - West Essex Highlands, Inc\Review #3 - 06-13-25 docx ———