Letter from Engineer to Board Secretary 01292026 4913 0296 5901 v1

Preliminary and Final Major Site Plan 575 Northfield Ave., LLC Block 159.01, Lot 1.01 January 29, 2026 Page 7 of 9 RESPONES-Not applicable, we have a reduction in impervious coverage and we comply with 25-29.4(s)3(b) as we will not be increasing runoff rate or volume at our design points 14. The Applicant proposes to address the stormwater runoff quantity standards by reducing the peak flow rates from the current and projected 2-, 10-, and 100-year storm events. The Stormwater Management Report notes an increase in volume for the post-development condition and states that this will not cause any flood damage downstream. The Applicant has not provided enough information to demonstrate that the site complies with the stormwater runoff quantity standards set forth in §25-29.4s3 of the Land Use Regulations. Respones-The stormwater report has been revised to include compliance with 25-29.4(s)3(b), as we will not be increasing runoff rate or volume at our design points 15. Within the Stormwater Management Report, the time of concentration calculation within the “Summary for Subcatchment E1A-B: E1A & E1B Disturbed” and “Summary for Subcatchment E3: E3” must be revised to have the first 100 feet be calculated as sheet flow. RESPONES-Revised 16. Within the Stormwater Management Report, the time of concentration of 5 minutes for the roof was provided without calculations. The Applicant must provide calculations for this time of concentration. RESPONES-Revised 17. The routing in the Stormwater Management Report must be revised to analyze impervious and pervious areas separately. RESPONES-Revised 18. The Storm Sewer Tabulation within Appendix C of the Stormwater Management Report is not legible and must be revised for review. RESPONES-Revised 19. The drainage area maps need to be revised to extend the drainage areas from the front lot lines to the limits of disturbance within the Northfield Avenue and Sheridan Avenue Rights-Of-Way. RESPONES-Revised 20. The drainage area maps need to be revised to correctly draw the time of concentration path. The paths currently shown are not drawn perpendicular with each of the contour lines. RESPONES-Updated 21. The drainage area maps need to be revised to show all of the time of concentration paths referenced in the routing analysis. In addition, the path must be labeled showing the sheet flow, shallow concentrated flows, and open

need to be revised to show all of the time of concentration paths referenced in the routing analysis. In addition, the path must be labeled showing the sheet flow, shallow concentrated flows, and open channel flows. RESPONES-Revised