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'r-ki- v-e 14. M�infnnnne^ Standaarde - citncpd Detention Systems (Tanks/Vaults) (continued) <br />Maintenance <br />Defect <br />Conditions When Maintenance is Needed <br />Results Expected When Maintenance Is Per - <br />formed <br />Component <br />Cover Not in Place <br />Cover is missing or only partially in place. Any open manhole requires maintenance. <br />Manhole is closed. <br />Manhole <br />Mechanism cannot be opened by one maintenance person with proper tools. Bolts into frame have less than 1f2 inch of <br />Mechanism opus with proper tools. <br />Locking Mechanism Not Working <br />thread (may not apply to self-locking lids). <br />One maintenance person cannot remove lid after applying normal lifting pressure. Intent is to keep coverfrom sealing off <br />Cover can be removed and reinstalled by one <br />Cover Difficult to Remove <br />access to maintenance. <br />maintenance person. <br />Ladder meets design standards. Allows main - <br />Ladder Rungs Unsafe <br />Ladder is unsafe due to missing rungs, misalignment, not securely attached to structure wall, rust, or cracks. <br />Ladder <br />personsafe access. <br />Catch Basins ` <br />See Table V-A.5: Maintenance Standards - Catch <br />See Table V-A.S: Maintenance Standards -Catch Basins <br />See Table V-A.5: Maintenance Standards - <br />Catch Basins <br />Basins <br />r.. a.r.. ai_w A. rra..r.s....—.... Q4—A—A� - Cnn4rnt C4■..r•4urofFlnw Rsaetrir-tnr <br />Maintenance Com- <br />Defect <br />Condition When Maintenance Is Needed <br />Results Expected When Maintenance is Performed <br />ponent <br />Trash and Debris (Includes Sediment) <br />Material exceeds 25% of sump depth or 1 foot below orifice plate. <br />Control structure orifice is not blocked. Ali trash and debris removed. <br />Structure securely attached to wall and outlet pipe. <br />Structure is not securely attached to manhole wall. <br />General <br />Structure is not in upright position (allow up to 1b% from plumb). <br />Structure in correct position. <br />Structural Damage <br />Connections to outlet pipe are not watertight and show signs of rust. <br />Connections to outlet pipe are watertight; structure repaired or replaced and <br />works as designed. <br />Any holes -other than designed holes - in the structure. <br />Structure has no holes other than designed holes. <br />Cleanout gate is not watertight or is missing. <br />Gate is watertight and works as designed. <br />Gate cannot be moved up and down by one maintenance person. <br />Gate moves up and down easily and is watertight. <br />Cleanout Gate <br />Damaged or Missing - - <br />ChaiNrod leading to gate is missing or damaged. ., _ <br />Chain is in place and works as designed. <br />Gate is rusted over 501/6 of its surface area. <br />Gate is repaired or replaced to meet design standards. <br />Orifice Plate <br />Damaged or Missing <br />Control device is not working properly due to missing, out of place, or <br />Plate is in place and works as designed. <br />. <br />bent orifice plate. <br />Obstructions <br />Any trash, debris, sediment, or vegetation blocking the plate. <br />Plate is free of all obstructions and works as designed. <br />Overflow Pipe <br />Obstructions <br />Any trash or debris blocking (or having the potential of blocking) the <br />pipe is free of all obstructions and works as designed. <br />overflow pipe. <br />See Table V-A.3: Maintenance Standards - Closed Detention Systems <br />See Table V-A.3: Maintenance Standards - Closed Detention Systems <br />See Table V-A.3: Maintenance Standards - Closed Detention Systems (rank-. <br />s lts <br />Manhole <br />(Tanks/Vaults) <br />YfanksNaults) <br />Catch Basin <br />See TableV-A.5:MaintenanceStandards-Catch Basins <br />See TableV-A.S:MaintenanceStandards-CatchBasins <br />See Table V-A.5: Maintenance Standards - Catch Basins <br />