Stormwater Agreement_07.24.2023 - Laserfiche WebLink

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III. Stormwater Treatment Maintenance Information: The following stormwater treatment maintenance information is provided for the treatment measures listed above: Bio-Retention Areas Defect Maintenance Is Needed If: Maintenance to be Performed Sediment Sediment depth exceeds 2 inches. Remove sediment. There should be no Accumulation on areas of standing water once inflow has Vegetation ceased. Standing Water Water stands in the treatment area or Remove sediment, trash blockages. Remove swale between storms and does not drain blockage from sub -drain lines as required. freely. Poor Vegetation Planted vegetation is sparse or bare or Replant so more than 90% of the bottom is Coverage eroded patches occur in more than 10% of covered with vegetation. Determine why the bottom of the treatment area or swale. growth of planted vegetation is poor and correct that condition. Overgrown Planted vegetation becomes excessively Mow Vegetation per maintenance plan. Vegetation tall, Nuisance weeds and other vegetation Remove nuisance vegetation so that flow is start to take over. not impeded. Remove clippings from the treatment area or swale and dispose of appropriately. Excessive Vegetation is not thriving because Trim back over -hanging limbs and remove Shading sunlight does not reach the treatment area brushy vegetation on adjacent slopes. or Swale. Inlet/Outlet Inlet/outlet areas are clogged with Remove material that is clogging inlet and sediment and/or debris. outlet areas. Trash and Debris Trash and debris have accumulated in the Remove trash and debris. Accumulation treatment area or Swale. Overflow Drains and Storm Drain Lines Defect Maintenance Is Needed If: Maintenance to be Performed Sediment Accumulation Sediment depth exceeds 2 inches. Remove sediment. Dispose of sediment properly. Trash and Debris Accumulation Trash and debris have accumulated in the drains. Remove trash and debris. Standing Water Water stands in the area around a drain. Remove blockage from storm drain line. Sub -drain Lines Defect Maintenance Is Needed If: Maintenance to be Performed Standing Water Water stands in the pervious paver patio area. Remove blockage from sub -drain line.