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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 Manhole/ Settlement/ If failure of basin has created a safety, function, Basin replaced or repaired to design <br /> Chamber Misalignment or design problem. standards. <br /> M Manhole/ Contamination and Any evidence of oil, gasoline, contaminants or No contaminants or pollutants present. <br /> Chamber Pollution other pollutants. (Coordinate removal/cleanup with the City of <br /> Everett Surface Water Management 425- <br /> 257-8885 and/or DOE Spill Response 800- <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 /> A Catch Cover Difficult to One maintenance person cannot remove lid Cover can be removed by one maintenance <br /> Basin Remove after applying normal lifting pressure. person. <br /> Cover (Intent is keep cover from sealing off access to <br /> maintenance.) <br /> If you are unsure whether a problem exists, please contact a professional engineer. <br /> Key: <br /> (M) Monthly from October through April. <br /> (A) Once in late summer(preferably September) <br /> (S) After any major storm (use 1 inch in 24 hours as a guideline). <br /> Appendices <br /> F-20 <br />