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= i .. <br /> CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> Date <br /> Drainage <br /> System Maintenance Activities and Conditions <br /> Frequency Feature ✓ ✓ ✓ ✓ Problem Conditions to Check For That Should 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-fourthinch 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 person judges that structure is Basin replaced or repaired to design <br /> in Basin Walls/ unsound. standards. <br /> Bottom <br /> A General Fractures or Grout fillet has separated or cracked wider than Pipe is re-grouted and secure at basin wall. <br /> Cracks in Basin one-half-inch and longer than 1 foot:at the:joint <br /> Walls/Bottom of any inlet/outlet pipe or anyevidence of soil <br /> particles entering catch basin through cracks. <br /> A General Settlement/ 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 inlet/outlet pipe joints that No vegetation or root growth 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 and/or DOE Spill Response$00- <br /> 424-8802.) <br /> A Catch Cover Not in Place Cover is missing or only partially in place. Any open catch.'basin requires maintenance. <br /> Basin Catch basin cover is closed <br /> Cover <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 Working frame have less than one-half-inch of thread. <br /> Appendices <br /> Everett Mall Plaza Parcel III Retail Expansion Stormwater Site Plan Page 80 <br />