2026 05 Operations and Management Manual rcd 5 6 2026

maintenance program, the basins are designed to completely drain within 72 hours after each rain event. This aids in the goal of preventing stagnate pools of water, resulting in the elimination of potential mosquito breeding habits. c) Parking Lot Maintenance: This management measure involves employing pavement cleaning practices, such as parking lot sweeping on a regular basis, to minimize pollutant export to the stormwater conveyance system/basin and downstream of the basin discharge. These cleaning practices are designed to remove sediment, debris, and other pollutants from access drive and parking lot surfaces that are a potential source of pollution impacting urban waterways. Mechanical machines that use vacuum-assisted dry sweeping to remove particulate matter shall be utilized as these have the ability to remove finer sediment particles. Parking lots and access drives shall be swept/vacuumed at least once a month. The disposal of the swept material must be properly hauled off the site and transferred to an approved disposal site. d) Observation After Rainfall: This management measure involves monitoring the amount of time the basin takes to drain to ensure it is working properly. The basin should drain in less than 72 hours after each rain event. If significant increases or decreases are observed in the drawdown time, a qualified licensed Professional Engineer shall be contacted to evaluate the basin’s bottom surface, subsoil, and both groundwater and tailwater elevations to determine what corrective measures may need to be implemented. 2. Corrective Maintenance Procedures: a) Removal of Debris and Sediment: Sediment, debris, and trash that threaten the discharge capacity of the basin should be removed immediately with the use of light-weight equipment to avoid soil compaction and properly disposed of. As noted previously, it is recommended that all water be evacuated from the basin with a pump before any significant amount of sediment, settled debris, or trash is removed from the basin. The lack of an available disposal site should not delay the removal of trash, debris, and sediment. Temporary disposal sites should be utilized if

, or trash is removed from the basin. The lack of an available disposal site should not delay the removal of trash, debris, and sediment. Temporary disposal sites should be utilized if necessary. b) Structural Repairs: Structural damage to outlet and inlet structures, trash racks, access hatches, roadways and walls as a result of vandalism, flood events, settlement, or other causes must be repaired promptly. The urgency of the repairs will depend upon the nature of the damage and its effects on the safety and operation of the facility. The analysis of Mavis Tire Supply, LLC May 2026 DEC# 1956-24-04187 5

structural damage and the design and performance of structural repairs should only be undertaken by the consulting Professional Engineer. c) Extermination of Mosquitoes: If neglected, basins can become an ideal mosquito breeding area. The extermination of mosquitoes will usually require the services of the County Mosquito Commission. If mosquito control in the facility becomes necessary, the preventative maintenance program should be re-evaluated, and more emphasis should be placed on control of mosquito breeding habitats. d) Snow and Ice Removal: Accumulations of snow and ice can threaten the functioning of the inlets and outlets. Provision of the equipment, material, and personnel to monitor and remove snow and ice from critical areas will ensure the function of the facility during the winter months. 3. Recording and Logging of all Maintenance Activities: The recording of all maintenance work and inspections provides valuable data on the facility’s condition. A review of this information will also help to establish more efficient and beneficial maintenance procedures and practices. All recorded information should be directed to the owner of the basin for review and subsequent follow-up on recommendations. Data obtained from informal inspections should be retained; however, this data does not have to be submitted to NJDEP. A detailed inspection and maintenance report must be submitted to the West Orange Engineering Department annually, no later than January 1st. 4. Summary of Maintenance Procedures: Preventative Maintenance a) Removal and Disposal of Trash/Debris and Sediment b) Elimination of Potential Mosquito Breeding Habitats c) Parking Lot Maintenance d) Observation After Rainfall Corrective Maintenance a) Removal of Debris and Sediment b) Structural Repairs c) Extermination of Mosquitoes d) Snow and Ice Removal Mavis Tire Supply, LLC May 2026 DEC# 1956-24-04187 6

B. Maintenance Equipment and Materials: 1. Transportation Equipment a) Trucks for Transportation of Materials b) Trucks for Transportation of Equipment c) Vehicles for Transportation of Personnel 2. Debris, Trash and Sediment Removal Equipment a) Loader b) Backhoe c) Grader d) Dredging equipment e) Portable pump for dewatering with sediment bag 3. Miscellaneous Equipment a) Shovels b) Rakers c) Picks d) Wheel Barrows e) Painting Equipment f) Gloves g) Brooms 4. Standard Mechanics Tools 5. Tools for Maintenance of Equipment 6. Parking Maintenance Equipment a) Sweeping/Vacuuming Equipment b) Snow Plowing Equipment c) Snow Shovels C. Checklist and Logs: The Appendix of this report contains sample checklists and logs regarding various aspects of the basin maintenance and inspection. A brief description of the use of each form is listed below: 1. “Maintenance Work Order and Checklist” – a comprehensive form outlining both required and completed maintenance work. Mavis Tire Supply, LLC May 2026 DEC# 1956-24-04187 7

2. “Maintenance Log” – a summary table for recording all maintenance work at the site. 3. “Inspection Log” – a summary table for recording the results of all inspections of the basin. 4. “Inspection Checklist” – a comprehensive form outlining required inspection work. D. Estimated Maintenance Costs and Tasks: The following is a summary of the required maintenance tasks and associated costs in written and tabular form: - Inspections to be performed by a consulting engineer on an annual basis. - $4,000.00. - Inspections to be performed by the property owner and/or a maintenance designee on a monthly basis and/or after a storm event exceeding 1 inch of rainfall – Minimal cost associated – Owner’s responsibility - $500.00. - Stormwater conveyance system and outlet control structure access for debris removal to be performed on an annual basis and/or as inspection routine dictates - $2,000.00. - Surface debris removal including garbage and organic matter to be performed in conjunction with grounds maintenance, including leaf removal in the Fall and removal of excessive amounts of snow, if necessary, in the Winter. These tasks are encouraged as necessary to maintain safe operating conditions (twice a month from Spring through Winter recommended or on a needed basis) - $1,000.00. Maintenance Schedule Summary: Task Identification Task Frequency Task Estimated Cost Inspection by licensed professional Four (4) times per year $1,000.00/Each consulting engineer Inspection by property owner and/or Once (1) per month (or $500.00/Each maintenance designee after a storm event exceeding 1 inch of rainfall) Debris removal from stormwater Once (1) per year $2,000.00 conveyance system (inlets, pipes, manholes, and outlet control structure) Surface debris removal (garbage & Twice (2) per month $1,000.00/Each organic matter) including leaves in (or on needed

ipes, manholes, and outlet control structure) Surface debris removal (garbage & Twice (2) per month $1,000.00/Each organic matter) including leaves in (or on needed basis) the Fall and snow in the Winter Mavis Tire Supply, LLC May 2026 DEC# 1956-24-04187 8

APPENDIX

MAINTENANCE WORK ORDER & CHECKLIST

TENANCE WORK ORDER AND CHECKLIST FOR STORMWATER MANAGEMENT FACILITIES NAME OF FACILITY: LOCATION: DATE: WEATHER: WORK STARTED: MAINTENANCE PERFORMED BY: WORK COMPLETED: 1. GRASS CUTTING A. BOTTOMS B. EMBANKMENTS AND SIDE SLOPES C. PERIMETER AREAS: D. ACCESS AREAS AND ROADS E, OTHERS 2. GRASS MAINTENANCE A. FERTILIZING B. RE-SEEDING C. DE-THATCHING D. PEST CONTROL E. OTHERS 3. VEGETATIVE COVER, A. FERTILIZING B. PRUNING C. PEST CONTROL D, POISONOUS PLANTS E. OTHERS 4. TRASH AND DEBRIS REMOVAL A. BOTTOMS B. EMBANKMENTS AND SIDE SLOPES C. PERIMETER AREAS D. ACCESS AREAS AND ROADS E. INLETS F, OUTLETS AND TRASH RACKS, G. OTHERS: 5. SEDIMENT REMOVAL A. INLETS B. OUTLETS AND TRASH RACKS C. LOW FLOW CHANNELS D. BOTTOMS E. OTHERS 6. PEST CONTROL A. GEESE B. MOSQUITO BREEDING C. RODENTS / RODENT HOLES D. OTHERS 7. STRUCTURAL REPAIRS A. VALVES: B. SLUICE GATES C. PUMPS D. FENCE GATES E. LOCKS F. ACCESS HATCHES. G, OTHER: 18. POND MAINTENANCE A. AERATION EQUIPMENT B. DEBRIS AND TRASH REMOVAL C. WEED REMOVAL ‘A. PARKING LOT SWEEPING B. EMPTYING TRASH RECEPTACLES C. PUMPS AND VALVES D. ELECTRICAL PANEL AND WIRING E. DEWATERING F_ GRAFFITI REMOVAL E. OTHER:

1. REMOVAL OF DEBRIS AND SEDIMENT _ | | I 2. STRUCTURAL REPAIRS I l I 3, EMBANKMENTS AND SIDE SLOPES I l [ 4. DEWATERING I I I 5. BASIN MAINTENANCE [ l I (6. CONTROL OF MOSQUITOES: I T [ 7. EROSION REPAIR [ I I 8. FENCE REPAIR [ I I 19. SNOW AND ICE REMOVAL. I [ [ 10. SAND LAYER REPLACEMENT I [ [ U1, OTHER I I l [ETIC MAINTENANCE T, GRAFFITI REMOVAL [ I I 2. GRASS TRIMMING l I I 3. WEEDING I I I 4, OTHERS I I ] WORK ORDER PREPARED BY: WORK COMPLETED BY: