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C1TY OF EVERETT STORMWATER MANAGEMENT MANUAL <br />Date <br />Drainage <br />System Maintenance Activities and Conditions <br />Freyuency Feature ✓✓✓ ✓ Problem Conditions to Check For That Shou�d Exist <br />A General Structure Damage Frame not sitting flush on top slab, i.e., Frame is sitting flush on the riser rings or top <br />to Frame and/or separation of more than three-fourth inch of the slab and firmly attached. <br />Top Slab frame from the top slab. Frame not securely <br />attached. <br />A General Fractures or Cracks Maintenance persan judges khat structure is Basin replaced or repaired to design <br />in Basin Wallsl unsound. standards. <br />Bottom <br />A General Fractures or Grout filEet has separated or crdcked wider than Pipe is re-grauted and secure at basin wall. <br />Cracics in Basin one-half-inch and fonger than 1 foot at the joint <br />Walls/ Bottom of any inleUoutlet pipe or any evidence of soil <br />particles entering catch basin through cracks. <br />A Genera( SettlemenU If failure of basin has created a safety, function, Basin replaced or repaired to design <br />Misalignment or design problem. standards. <br />M General Vegetation Vegetation growing across and blocking more No vegetation blocking opening to basin. <br />than 10 percent of the basin opening. <br />M General Vegetation Vegetation growing in inleUoutfet pipe joints that No vegetation or root growtE� present. <br />is more than 6 inches tall and less than 6 inches <br />apart. <br />M General Contamination and Any evidence of oil, gasoline, contaminants or No contaminants or pollutants present. <br />Pollution other pollutants. (Coordinate removal/cleanup with the City of <br />Everett Surface Water Management 425- <br />257-8885 andlor DOE Spill Response 800- <br />424-8802.) <br />A Catch Cover Not in Place Cover is missing or only partiaily in place. Any open catch basin requires maintenance. <br />Basin Catch basin cover is closed <br />Gover <br />A Catch Locking Mechanism cannot be opened by one Mechanism opens with proper tools. <br />Basin Mechanism Not maintenance person with proper tools. Bolts into <br />Cover Woricing frame have less than one-half-inch of thread. <br />Appendices <br />F-i5 <br />