22 O and M Manual NJA23013900 August 2025

The pervious pavement system should be evaluated regularly to determine whether excessive invasive plant growth is evident. If it occurs, this situation can be corrected by appropriate application of fertilizers and weed killers. Weeds which have become a problem can be cleared through manual removal by professional pond maintenance technicians, in the case of the small wet pond. b) Maintenance of Adjacent Areas: Grass areas, trees, and shrubs adjacent to the pervious pavement system and conveyance swales require periodic routine maintenance to include fertilizing, dethatching and soil conditioning in order to maintain healthy growth and to provide bank stabilization. The application of fertilizers should follow manufacturer’s instructions to reduce run-off of these compounds into the pervious pavement system. Additionally, provisions should be made to re-seed and re-establish grass cover in areas damaged by sediment accumulation, stormwater flow, or other causes. These tasks should be performed, or at least evaluated, on a quarterly basis. Lawn areas should be mowed at least once a month during the growing season. Vegetated areas must be inspected at least annually for erosion and scour as well as unwanted growth, which should be removed with minimum disruption to the remaining vegetation. Note: All use of fertilizers, mechanical treatments, pesticides and other means to ensure optimum vegetation health must not compromise the intended purpose of the stormwater management facility. All vegetation deficiencies should be addressed without the use of fertilizers and pesticides whenever possible and if necessary, the minimum amount practical. c) Removal and Disposal of Trash/Debris and Sediment: All stormwater management components expected to receive and/or trap debris and sediment must be inspected for clogging and excessive debris and sediment accumulation at least four times annually as well as after every storm exceeding one inch of rainfall in 24 hours. Such components should include pervious pavement system bottom and inspection ports. Removal of trash and debris will prevent possible damage to vegetated areas and minimize potential mosquito breeding habitats. Debris and trash must be properly hauled off the site and transferred to an approved disposal site. Accumulated sediment should be removed before it threatens the storage volume of the pervious

itats. Debris and trash must be properly hauled off the site and transferred to an approved disposal site. Accumulated sediment should be removed before it threatens the storage volume of the pervious pavement system. Before de-sedimentation activities are performed, consideration should be given to evacuating all standing water from the pervious pavement system. Disposal of discharged water and sediment must comply with all local, county, state and federal regulations. Only suitable disposal sites should be utilized. If stable soil conditions exist around the pervious pavement system, sediment deposition should not be an excessive maintenance issue. 5