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1 <br /> Table V-4.5.2 5 Maintenance Standards - Catch Basins (continued) 1 <br /> Results <br /> Maintenance Conditions When Maintenance is Expected <br /> Defect When Main- <br /> Component Needed' <br /> tenance is <br /> performed I <br /> Working frame have less than 1/2 inch of thread. proper tools. <br /> One maintenance person cannot remove lid Cover can be <br /> Cover Difficult after applying normal lifting pressure. removed by <br /> one main- <br /> to Remove <br /> (Intent is keep cover from sealing off access tenance per- I <br /> to maintenance.) son. <br /> Ladder meets <br /> design stand- <br /> Ladder Rungs Ladder is unsafe due to missing rungs, not ards and <br /> Ladder securely attached to basin wall, mis- allows main- <br /> Unsafe alignment, rust, cracks, or sharp edges. tenance per- <br /> son safe <br /> access. <br /> Grate open- <br /> Grate opening ing meets <br /> Unsafe Grate with opening wider than 7/8 inch. design stand- <br /> ards. <br /> Metal Grates Trash and Trash and debris that is blocking more than Grate free of <br /> (If Applic- trash and <br /> Debris 20% of grate surface inletting capacity. <br /> able) debris. <br /> Grate is in <br /> Damaged or Grate missing or broken member(s)of the place and <br /> Missing. grate. meets design <br /> standards. <br /> 11 <br /> I <br /> I <br /> I <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume V- Chapter 4-Page 840 I <br />