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No.4-Control Structure/Flow Restrictor <br /> Maintenance Defect Condition When Maintenance is Needed Results Expected <br /> Component When Maintenance <br /> is Performed <br /> General Trash and Debris Material exceeds 25%of sump depth or 1 Control structure <br /> (Includes Sediment) foot below orifice plate. orifice is not blocked. <br /> All trash and debris <br /> removed. <br /> Structural Damage Structure is not securely attached to Structure securely <br /> manhole wall. attached to wall and <br /> outlet pipe. <br /> Structure is not in upright position (allow up Structure in correct <br /> to 10%from plumb). position. <br /> Coections to t pt watertignc to outle <br /> and show signs of rust. pipe are watertions tight; <br /> structure repaired or t <br /> replaced and works <br /> as designed. <br /> Anynn holes--other thanoutle designedipeare no holes--in theht Structure has no <br /> structure. holesCo other than <br /> designedne holes. <br /> Cleanout Gate Damaged or Missing Cleanout gate is not watertight or is missing. Gate is watertight <br /> and works as <br /> designed. <br /> Gate cannot be moved up and down by one Gate moves up and <br /> maintenance person. down easily and is <br /> watertight. <br /> Chain/rod leading to gate is missing or Chain is in place and <br /> damaged. works as designed. <br /> Gate is rusted over 50%of its surface area. Gate is repaired or <br /> replaced to meet <br /> design standards. <br /> Orifice Plate Damaged or Missing Control device is not working properly due to Plate is in place and <br /> missing, out of place, or bent orifice plate. works as designed. <br /> Obstructions Any trash, debris,sediment, or vegetation Plate is free of all <br /> blocking the plate. obstructions and <br /> works as designed. <br /> Overflow Pipe Obstructions Any trash or debris blocking(or having the Pipe is free of all <br /> potential of blocking)the overflow pipe. obstructions and <br /> works as designed. <br /> Manhole See"Closed See"Closed Detention Systems"(No. 3). See"Closed <br /> Detention Systems" Detention Systems" <br /> (No. 3). (No. 3). <br /> Catch Basin See"Catch Basins" See"Catch Basins"(No.5). See"Catch Basins" <br /> (No. 5). (No. 5). <br /> Volume V—Runoff Treatment BMPs—December 2014 <br /> 4-37 <br /> You created this PDF from an application that is not licensed to print to novaPDF printer(http://www.novapdf.com) <br />