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5/7/2021 2019SWMMWW-BMP Maintenance Tables <br /> Results Expected <br /> Maintenance Defect Conditions When Maintenance is Needed When <br /> Component Maintenance is <br /> Performed <br /> See Table V-A.5: See Table V-A.5: <br /> Catch Basins Maintenance See Table V-A.5: Maintenance Standards- Catch Maintenance <br /> Standards - Catch Basins Standards - Catch <br /> Basins Basins <br /> Table V-A.4: Maintenance Standards - Control Structure/Flow Restrictor <br /> Maintenance Condition When Results Expected When <br /> Component Defect Maintenance is Needed Maintenance is Performed <br /> Trash and Debris (Includes Material exceeds 25% of sump Control structure orifice is not <br /> Sediment) depth or 1 foot below orifice blocked. All trash and debris <br /> plate. removed. <br /> Structure is not securely <br /> attached to manhole wall. Structure securely attached to wall <br /> General Structure is not in upright and outlet pipe. <br /> position (allow up to 10%from Structure in correct position. <br /> plumb). <br /> Structural Damage Connections to outlet pipe are <br /> Connections to outlet pipe are water tight; structure repaired or <br /> not watertight and show signs of rust. replaced and works as designed. <br /> Any holes -other than Structure has no holes other than <br /> designed holes- in the designed holes. <br /> structure. <br /> Cleanout gate is not watertight Gate is watertight and works as <br /> or is missing. <br /> designed. <br /> Gate cannot be moved up and Gate moves up and down easily <br /> down by one maintenance <br /> Cleanout and is watertight. <br /> Damaged or Missing person. <br /> Gate Chain is in place and works as <br /> Chain/rod leading to gate is designed. <br /> missing or damaged. <br /> Gate is rusted over 50% of its Gate is repaired or replaced to <br /> surface area. meet design standards. <br /> Control device is not working Plate is in place and works as <br /> Damaged or Missing properly due to missing, out of <br /> Orifice Plate place, or bent orifice plate. designed. <br /> Obstructions Any trash, debris, sediment, or Plate is free of all obstructions and <br /> vegetation blocking the plate. works as designed. <br /> Overflow Any trash or debris blocking (or Pipe is free of all obstructions and <br /> Pipe Obstructions having the potential of works as designed. <br /> blocking)the overflow pipe. <br /> https://fortress.wa.gov/ecy/ershare/wq/Permits/Flare/2019SWMMWW/2019SWMMWW.htm#TopicsNolumeV/App_BMPMaintenanceTables.htm%3FT... 2/6 <br />