2024 12 27 Maintenance Manual 1

General maintenance for all stormwater management measures include: a. Inspection of inlets (in parking lot areas) and riprap aprons for clogging and excessive debris and sediment accumulations at least 4 times annually as well as after every storm exceeding 1 inch of rainfall. b. Disposal of debris, trash, sediment and other waste material must be done at suitable disposal/recycling sites and in compliance with all applicable local, state and federal waste regulations. c. Parking lot and lawn areas within the site to be kept free of trash/debris and maintained to the greatest extent possible to prevent clogging of stormwater systems. d. All structural components must be inspected for cracking, subsidence, spalling erosion and deterioration at least annually and repaired as required to restore components to their original condition. e. Inspection of all underground systems shall be in strict accordance with OSHA recommendations for confined space entry and shall be performed during periods of dry weather. f. In no instance shall inspection of an underground system be performed less than 72 hours after the end of a rainfall event to allow proper drain time of the systems. II. MAINTENANCE COST ESTIMATE Storm Sewers and Inlets….…….…………………………...………....$2,000 per year Maintenance cost estimate includes all maintenance tasks, including inspection, sediment, trash and debris removal. Maintenance cost estimates are based on engineering assumptions, manufacturer’s recommendations as well as the relative frequency of maintenance. Actual costs may differ from estimate. III. APPENDIX HDPE PIPE REPAIR OPTIONS 4