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No. 1 -Closed Detention Systems (TanksNaults) <br /> Maintenance Defect f4, Cond:4 I.04, <br /> When Ma041 Mn Results`Expected When'i€ Dat Inspected <br /> Corti. nent �� is.neededh �� ;', �.�_ '. Maintenance is"Performed>;� Inspected: By, <br /> Storage Area Plugged Air One-half of the cross section Vents open and funtioning. <br /> Vents of a vent is blocked at any <br /> point or the vent is damaged. <br /> Debris and Accumulated sediment depth All sediment and debris <br /> Sediment exceeds 10%of the diameter removed from storage area. <br /> of the storage area for 1/2 <br /> length of storage vault or any <br /> ' point depth exceeds 15%of <br /> diameter. <br /> (Example: 72-inch storage <br /> tank would require cleaning <br /> when sediment reaches <br /> depth of 7 inches for more <br /> ' Joints than 1/2 length of tank.) <br /> Any openings or voids All joint between tank/pipe <br /> Between allowing material to be sections are sealed. <br /> ' Tank/Pipe transported into facility. <br /> Section <br /> (Will require engineering <br /> analysis to determine <br /> structural stability.) <br /> Tank Pipe Any part of tank/pipe is bent Tank/pipe repaired or <br /> Bent Out of out of shape more than 10% replaced to design. <br /> t Shape of its design shape. (Review <br /> required by engineer to <br /> determine structural stability). <br /> ' Vault Structure Cracks wider than 1/2-inch and Vault replaced or repaired <br /> Includes any evidence of soil particles to design specifications <br /> Cracks in Wall, entering the structure through and is structurally sound. <br /> ' Bottom, the cracks, or maintenance/ <br /> Damage to inspection personnel No cracks more than <br /> Frame and/or determines that the vault is 1/4-inch wide at the joint <br /> Top Slab not structurally sound. of the inlet/outlet pipe. <br /> Cracks wider than 1/2-inch at <br /> the joint of any inlet/outlet pipe <br /> ' or any evidence of soil particles <br /> entering the vault through the <br /> walls. <br /> t Manhole Cover Not Cover is missing or only Manhole is closed. <br /> in Place partially in place. Any open <br /> manhole requires maintenance <br /> 1 <br /> 1 <br />