Stormwater Management Operation and Maintenance Manual Feb 2026 resubmissionrcd 2 26

Design Engineer: Rodman R. Ritchie, PE, PP Dynamic Engineering Consultants, PC 5 Greentree Centre, Suite 406 Marlton, NJ 08053 (856) 334-2000 C. Proposed Best Management Practices: Above-ground Bioretention Basin & Underground Detention Basin The stormwater management design utilizes one (1) above-ground bioretention basin and one (1) underground detention basin. The above-ground bioretention basin accepts stormwater runoff from the proposed parking lots, paved areas, and other open space areas which are designed to convey overland flow directly to the basin via a 4’ wide curb cut and riprap swale. The proposed underground detention basin accepts stormwater runoff from the proposed building, collected by roof drains along the rear of the building. Stormwater will be released at a controlled rate through the outlet control structure from the proposed underground detention basin. Stormwater runoff that is detained within the basins shall drain within 72 hours. If significant increases or decreases in this draining time are observed, a qualified licensed Professional Engineer shall be contacted to evaluate possible corrective measures that may be required. INSPECTION AND MAINTENANCE: A. Routine Inspection and Maintenance of the Stormwater Management Facilities: The stormwater management basin has been designed to control stormwater and reduce flooding and degradation of water quality. Without proper routine inspection and maintenance, the basin may lose some or all of its capability to function at its full capacity. Lack of adequate maintenance at these facilities could lead to system failures. A consulting Professional Engineer should perform regularly scheduled maintenance inspections of the stormwater facilities at least four (4) times each year. The primary purpose of these inspections is to ascertain the operational condition and safety of the facilities, particularly the condition of the outlet structures, trash racks, and other safety-related aspects. Inspections will provide information on the effectiveness of regularly scheduled Preventative Maintenance Procedures and help to identify where changes in the extent and schedule of the procedures are warranted. Finally, the

information on the effectiveness of regularly scheduled Preventative Maintenance Procedures and help to identify where changes in the extent and schedule of the procedures are warranted. Finally, the facility inspections should also be used to determine the need for and timing of Corrective Maintenance procedures. Routine maintenance of this facility should be identified as Functional Maintenance. Functional Maintenance is further broken down into two (2) categories: Preventative and Corrective. Listed Mavis Tire Supply, LLC February 2026 DEC# 1956-24-04187 2