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i <br /> � <br /> � <br /> No. 4—Control StructurelFlow Restrictor <br /> �� Maintenance Defect Condition When Maintenance is Needed ResW4s Expected <br /> Component When Malntenance <br /> is Perfortned <br /> General Trash and Debris Matenal exceeds 259b of sump deplh or 7 Control structure <br /> fincludes Sedimeni) foot below orifice plate. orifce is not blocked. <br /> All tresh and debris <br /> I removed. <br /> Structural Damage Slructure is nol securely atlached to Structure securely <br /> manhole wall. attached to wall and <br /> I oullel pipe. <br /> SirucWre is no�in upnghl position(allow up SirucWre in correct <br /> to 10%from plumb). posilion. <br /> I Conneclions to outlet pipe are not watertighl Connections to outlel <br /> and show signs of rust. pipe are waler tight; <br /> structure repaired or <br /> replaced and works <br /> � as designed. ' <br /> Any holes--olher�han designed holes--in the StrucWre has no <br /> strucWre. holes olher Ihan <br /> designed holes. <br /> � Cleanout Gale Damayed or Misslny Cleanout yate Is nut wateAigh� x is missiny. Gate is watertight <br /> and works as <br /> designed. <br /> I Gale cannot be moved up and down by or� Gate moves up and <br /> f maintenance person. down easily and is <br /> walertight. <br /> I ChaiNrod leading to gale is missing or Chain is in place and <br /> damaged. works as designed. <br /> Gate is rusled over 50"0 of its sudace area. Gale is repaired or <br /> replaced to meet <br /> design standards. <br /> Orifice Plate Damaged or Missing Control devirn is not working properly due to Plale is in place and <br /> missing,oul o(place,or bent orifice plate. works as designed. <br /> Obstiuctions Any trash,debris,sediment,or vegetalion Plate is�ree of all <br /> blocking lhe plate. obstructions and <br /> works as designed. <br /> Gveriiow Pipe Obslructions Any Irash or debris blocking(or having the Pipe is iree o(all <br /> poten!ial of blocking)the overtlow pipe. obstructions and <br /> works as designed. <br /> Manhole See'Closed See'Closed Delention Systems'(No.3). See"Closed <br /> Delention Syslems" Detention Systems' <br /> (No.3). (No. 3). <br /> Catch Basin See'Catch Basins" See'Catch Basins'(No.5). See"Calch Basins" <br /> (No. 5). (No. 5). <br /> h1 <br /> A�igust 2001 Volume V—RunoN Treatment BMPs 4-35 <br />