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1 <br /> NO.4-CONTROL STRUCTURE/FLOW RESTRICTOR <br /> Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When <br /> Component Maintenance is Performed <br /> Structure Trash and debns Trash or debris of more than%cubic foot which No Trash or debris blocking or <br /> is located immediately in front of the structure potentially blocking entrance to <br /> opening or is blocking capacity of the structure by structure. <br /> more than 10%. <br /> Trash or debris in the structure that exceeds'/, No trash or debris in the structure. <br /> the depth from the bottom of basin to invert the <br /> lowest pipe into or out of the basin. <br /> Deposits of garbage exceeding 1 cubic foot in No condition present which would <br /> volume. attract or support the breeding of <br /> insects or rodents <br /> Sediment Sediment exceeds 60%of the depth from the Sump of structure contains no <br /> bottom of the structure to the invert of the lowest sediment. <br /> pipe into or out of the structure or the bottom of <br /> the FROP-T section or is within 6 inches of the <br /> invert of the lowest pipe into or out of the <br /> structure or the bottom of the FROP-T section. <br /> Damage to frame Comer of frame extends more than%inch past Frame is even with curb. <br /> and/or top slab curb face into the street(If applicable) <br /> Top slab has holes larger than 2 square inches or Top slab is free of holes and cracks. <br /> cracks wider than' inch. <br /> Frame not sitting flush on top slab.i.e., Frame is sitting flush on top slab. <br /> separation of more than' inch of the frame from <br /> the top slab. <br /> Cracks in walls or Cracks wider than'/,inch and longer than 3 feet Structure is sealed and structurally <br /> bottom any evidence of soil particles entenng structure sound. <br /> through cracks,or maintenance person judges <br /> that structure is unsound <br /> Cracks wider than%inch and longer than 1 foot No cracks more than'!,inch wide at <br /> at the joint of any inlet/outlet pipe or any evidence the joint of inlet/outlet pipe. <br /> of soil particles entering structure through cracks. <br /> Settlement/ Structure has settled more than 1 inch or has Basin replaced or repaired to design <br /> misalignment rotated more than 2 inches out of alignment. standards. <br /> Damaged pipe joints Cracks wider than 7,-inch at the joint of the No cracks more than''h-inch wide at <br /> inlet/outlet pipes or any evidence of soil entering the joint of inlet/outlet pipes. <br /> the structure at the joint of the inleVoutlet pipes. <br /> Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of <br /> pollution as oil,gasoline.concrete slurries or paint. according to applicable regulations. <br /> Source control BMPs implemented if <br /> appropriate. No contaminants <br /> present other than a surface oil film. <br /> Ladder rungs missing Ladder is unsafe due to missing rungs. Ladder meets design standards and <br /> or unsafe misalignment,rust.cracks,or sharp edges. allows maintenance person safe <br /> access. <br /> FROP-T Section Damage T section is not securely attached to structure T section securely attached to wall <br /> wall and outlet pipe structure should support at and outlet pipe <br /> least 1.000 lbs of up or down pressure <br /> Structure is not in upright position(allow up to Structure in correct position. <br /> 10%from plumb) <br /> Connections to outlet pipe are not watertight or Connections to outlet pipe are water <br /> show signs of deteriorated grout. tight structure repaired or replaced <br /> and works as designed. <br /> Any holes—other than designed holes—in the Structure has no holes other than <br /> structure designed holes <br /> Cleanout Gate Damaged or missing Cleanout gate is missmq Replace cleanout gate <br /> I <br /> I <br /> 1 <br />