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I I No 5 Catch Basins ' .. a._ . a _ ,}r" . lMatntetnce eDefect ; ConditonsWhenMaI a� ce-tsNeeded ResutsExpect ed When 4Qpone'nt a�'= ac- �=' - x > ? Ma'nenaee Ism < - - �f -y,- - k � n IR1:- 4 4 -3 .t,--- fm., ,1 �s t- _ performed.1 _ -l .-: r - General Trash& Trash or debris which is located immediately No Trash or debris located Debris in front of the catch basin opening or is immediately in front of I blocking inletting capacity of the basin by more than 10%. catch basin or on grate opening. Trash or debris(in the basin)that exceeds 60 No trash or debris in the percent of the sump depth as measured from catch basin. I the bottom of basin to invert of the lowest pipe into or out of the basin,but in no case less than a minimum of six inches clearance from the debris surface to the invert of the I lowest pipe. Trash or debris in any inlet or outlet pipe Inlet and outlet pipes free blocking more than 1/3 of its height. of trash or debris. I Dead animals or vegetation that could No dead animals or generate odors that could cause complaints vegetation present within or dangerous gases(e.g., methane). the catch basin. Sediment Sediment(in the basin)that exceeds 60 No sediment in the catch I percent of the sump depth as measured from basin the bottom of basin to invert of the lowest pipe into or out of the basin, but in no case less than a minimum of 6 inches clearance I from the sediment surface to the invert of the lowest pipe. I Structure Top slab has holes larger than 2 square Top slab is free of holes Damage to inches or cracks wider than 1/4 inch and cracks. Frame and/or Top Slab (Intent is to make sure no material is running into basin).I Frame not sitting flush on top slab,i.e., Frame is sitting flush on separation of more than 3/4 inch of the frame the riser rings or top slab from the top slab. Frame not securely and firmly attached. I attached Fractures or Maintenance person judges that structure is Basin replaced or repaired Cracks in unsound. to design standards. Basin Walls/ I Bottom Grout fillet has separated or cracked wider Pipe is regrouted and than 1/2 inch and longer than 1 foot at the secure at basin wall. joint of any inlet/outlet pipe or any evidence of I soil particles entering catch basin through cracks. Settlement/ If failure of basin has created a safety, Basin replaced or repaired I Misalignment function,or design problem. to design standards. Vegetation Vegetation growing across and blocking more No vegetation blocking than 10%of the basin opening. opening to basin. I Vegetation growing in inlet/outlet pipe joints No vegetation or root that Is more than six inches tall and less than growth present. six inches apart. I 4-36 Volume V—Runoff Treatment BMPs February 2005 I