OPERATION, MAINTENANCE, AND INSPECTION. The Property Owner agrees to and shall, to the extent practicable, maintain and operate the GMPs for the purpose of achieving MSD’s defined infiltration and other water quality benefits, which maintenance and operation activities shall include, at a minimum, the following (as noted applicable): ❑ ❑
OPERATION, MAINTENANCE, AND INSPECTION. Costs and expenses (e.g., transportation, etc.) associated with performing operations, maintenance and inspection functions including the cost of materials.
OPERATION, MAINTENANCE, AND INSPECTION. The Property Owner agrees to and shall, to the extent practicable, maintain and operate the GMPs/BMPs for the purpose of achieving MSD’s defined infiltration and other water quality benefits, which maintenance and operation activities shall include, at a minimum, the following (as noted applicable): Checked as: Applicable Not Applicable ❑ ❑ Consistent and routine observations of infiltration rates. This is for all GMPs/BMPs that infiltrate and can be found in Chapter 18 of the MSD Design Manual or alternative GMPs/BMPs that MSD approved. ❑ ❑ Annual maintenance of GMPs/BMPs to remove excess sediment, leaf or other vegetative debris, etc. to keep inflow points free of clogging and to confirm infiltration rates of approximately 0.5 inches per hour as estimated through observation or basic on-site testing. ❑ ❑ Annual inspections of vegetated areas of GMPs/BMPs for trimming, pruning, and dividing perennials to prevent overcrowding and to address stress indicators. ❑ ❑ Monthly inspections in spring (April – June) and fall (September – October) of vegetated areas of GMPs/BMPs to determine the need for and maintain removal of excess sediment, debris, etc. to keep inflow points free of clogging, as well as consistent and routine pruning, trimming, and weeding, removal of fallen, clipped, and trimmed plant material, removal and replacement of dead or damaged plants, and removal of trash and debris. ❑ ❑ Inspect media, soil, and/or mulch every 2 to 3 years to determine necessity to re-aerate or replace media, soil, and/or mulch layers to achieve infiltration rates of approximately 0.5 inches per hour as estimated through observation or basic on-site testing. ❑ ❑ Quarterly inspections of pre-treatment and post- treatment systems including, but not limited to: filters, swirl separators, oil-water separators, grit controllers, absorbents, adsorbents, etc. to determine the need for media replacement and/ or maintain removal of sediment, trash, leaf or other vegetative debris, etc. to keep inflow and emergency overflow points free of clogging or re-suspension of collected materials. ❑ ❑ The Property Owner or third party entity, such as a Management Group or Homeowners Association, is responsible for notifying MSD when potential structural maintenance is required at the outlet structure, overflow bypasses, culverts, pipes, observation well, and/or other structural elements. The responsible entity will be responsible for the following activities for GMPs/ BMPs: mowing; debri...
