2023 07 10 Twp Resubmission Letter

Township of West Orange July 7, 2023 Page 6 of 12 Stormwater Management Comments: 1. The proposed development will result in the disturbance of more than 1 acre. As a result, it is classified as a Major Development and is subject to the stormwater management requirements set forth in §25-29.4 of the Ordinance. Information. 2. As stipulated in §25-29.3.a.2 of the Ordinance, the minimum standards for groundwater recharge, stormwater quality and stormwater runoff quantity shall be met by incorporating green infrastructure. Therefore, the Applicant must demonstrate compliance with this requirement. The enclosed Drainage Statement has been revised to demonstrate compliance with the referenced Township Ordinance and NJAC 7:8. 3. The time of concentration path from Point A to Point B shown on the Proposed Drainage Area Map in the Drainage Statement does not follow the proposed contours shown on the Grading Plan (sheet 6). This discrepancy must be resolved. The Proposed Drainage Area Map has been revised to have the time of concentration path follow the proposed contours. 4. The Stormwater Collection System Calculations table in the Drainage Statement must be revised to show each of the proposed 6" pipes. At present, only the 6" pipe from the Sonic Roof is shown. The Stormwater Collection System Calculations in the enclosed Drainage Statement have been revised accordingly. 5. Our office has reviewed the Stormwater Management Operation and Maintenance Manual and finds that Section II must be revised to include the telephone number of the property/system owner. The Stormwater Management Operation and Maintenance Manual has been revised to provide the telephone number of the property/system owner. 6. The Stormwater Management Operation and Maintenance Manual and any future revisions must be recorded upon the deed of record for the property. Prior to recording, the form of the deed must be approved by the Board Attorney and our office. Acknowledged. 7. It shows on sheet 4 that a Type 'A' inlet currently exists behind the existing building. The Applicant should clarify how this inlet is piped offsite. The location of the discharge from this inlet could affect the Existing Drainage Area Map in the Drainage Statement. Our office conducted an additional site visit to the property and were unable to locate the discharge from the existing inlet due to it being filled with

g Drainage Area Map in the Drainage Statement. Our office conducted an additional site visit to the property and were unable to locate the discharge from the existing inlet due to it being filled with debris. The Demolition and Tree Removal Plan (Sheet 4 of 20) has been revised to note the “Contractor to confirm discharge point of inlet and report back to engineer of record”.