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No. 5—Catch Basins <br /> Maintenance Defect Conditions When Maintenance is Needed Results Expected When <br /> Component Maintenance is <br /> performed <br /> Catch Basin Cover Not in Cover is missing or only partially in place. Catch basin cover is <br /> Cover Place Any open catch basin requires maintenance. closed <br /> Locking Mechanism cannot be opened by one Mechanism opens with <br /> Mechanism maintenance person with proper tools. Bolts proper tools. <br /> Not Working into frame have less than 1/2 inch of thread. <br /> Cover Difficult One maintenance person cannot remove lid Cover can be removed by <br /> to Remove after applying normal lifting pressure. one maintenance person. <br /> (Intent is keep cover from sealing off access <br /> to maintenance.) <br /> Ladder Ladder Rungs Ladder is unsafe due to missing rungs, not Ladder meets design <br /> Unsafe securely attached to basin wall, standards and allows <br /> misalignment, rust, cracks,or sharp edges. maintenance person safe <br /> access. <br /> Metal Grates Grate opening Grate with opening wider than 7/8 inch. Grate opening meets <br /> (If Applicable) Unsafe design standards. <br /> Trash and Trash and debris that is blocking more than Grate free of trash and <br /> Debris 20%of grate surface inletting capacity. debris. <br /> Damaged or Grate missing or broken member(s)of the Grate is in place and <br /> Missing. grate. meets design standards. <br /> No. 6—Debris Barriers (e.g., Trash Racks) <br /> Maintenance Defect Condition When Maintenance is Results Expected When <br /> Components Needed Maintenance is Performed <br /> General Trash and Trash or debris that is plugging more Barrier cleared to design flow <br /> Debris than 20%of the openings in the barrier. capacity. <br /> Metal Damaged/ Bars are bent out of shape more than 3 Bars in place with no bends more <br /> Missing inches. than 3/4 inch. <br /> Bars. <br /> Bars are missing or entire barrier Bars in place according to design. <br /> missing. <br /> Bars are loose and rust is causing 50% Barrier replaced or repaired to <br /> deterioration to any part of barrier. design standards. <br /> Inlet/Outlet Debris barrier missing or not attached to Barrier firmly attached to pipe <br /> Pipe pipe <br /> Volume Y'--Runoff Treatment BIIIPs—December 2014 <br /> 4-39 <br />