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OPERATION & MAINTENANCE MANUAL <br /> CATCH BASINS/MANHOLES <br /> Maintenance Defect Conditions When Maintenance is Desired Conditions <br /> Component Needed <br /> General Trash&debris(includes Trash or debris of more than'/2 ft3 which is No trash or debris located <br /> sediment) located immediately in front of the catch immediately in front of catch <br /> basin opening or is blocking capacity of the basin opening. <br /> basin by more than 10%. <br /> Trash or debris(in the basin)that exceeds 1/3 Inlet and outlet pipes free of <br /> of its height. trash or debris. <br /> Dead animals or vegetation that could No dead animals or vegetation <br /> generate odors that could cause complaints or present within the catch basin. <br /> dangerous gases(i.e.methane). <br /> Deposits of garbage exceeding 1 ft3 in No condition present which <br /> volume. would attract or support the <br /> breeding of insects or rodents. <br /> Trash,debris,or sediment in the basin that No trash,debris or sediment <br /> exceeds 60% of the sump depth,or trash, within the catch basin <br /> debris,or sediment that is within 6"of the <br /> invert of the lowest pipe <br /> Structure Damage to Corner of frame extends more than 34"past Frame is even with curb. <br /> Frame and/or top slab curb face into the street(if applicable). <br /> Top slab has holes larger that 2 in2 or cracks Top slab is free of holes& <br /> wider than'/"(intent is to make sure all cracks. <br /> material is running into basin). <br /> Frame not sitting flush on top slab;i.e. Frame is sitting flush on top <br /> separation of more than 3/4"of the frame from slab. <br /> the top slab. <br /> Cracks in Basin Maintenance person judges that structure is Basin replaced or repaired to <br /> Walls/Bottom unsound. design standards. <br /> Cracks wider than 'A"and longer than 1 ft at No cracks more than '/"wide at <br /> the joint of any inlet/outlet pipe or any the joint of inlet/outlet pipe. <br /> evidence of soil particles entering catch basin <br /> through cracks. <br /> Settlement/Misalignment Basin has settled more than 1"or has rotated Basin replaced or repaired to <br /> more than 2"out of alignment. design standards. <br /> Fire Hazard Presence of chemicals such as natural gas,oil, No flammable chemicals <br /> and/or gasoline. present. <br /> Vegetation Vegetation growing across&blocking more No Vegetation blocking opening <br /> than 10%of the basin opening. to basin. <br /> Vegetation growing in inlet/outlet pipe joints No vegetation or root growth <br /> that is more than 6"tall and less than 6"apart. present. <br /> Pollution Non-flammable chemicals of more than`/2 ft3 No pollution present other than <br /> per 3 ft of basin length. surface film. <br /> /IF/ <br /> 6s: <br /> II <br /> .,+Fq <br />