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No. 15—StormfilterTM (leaf compost filter) <br /> Maintenance Defect Condition When Maintenance is Results Expected When <br /> Component Needed Maintenance is Performed <br /> Below Ground Sediment Sediment depth exceeds 0.25-inches. No sediment deposits which <br /> Vault Accumulation on would impede permeability of <br /> Media. the compost media. <br /> Sediment Sediment depth exceeds 6-inches in first No sediment deposits in vault <br /> Accumulation in chamber. bottom of first chamber. <br /> Vault <br /> Trash/Debris Trash and debris accumulated on Trash and debris removed from <br /> Accumulation compost filter bed. the compost filter bed. <br /> Sedimenti n When drain pipes,clean-outs, become Sediment and debris removed. <br /> Drain full with sediment and/or debris. <br /> Pipes/Clean- <br /> Outs <br /> Damaged Pipes Any part of the pipes that are crushed or Pipe repaired and/or replaced. <br /> damaged due to corrosion and/or <br /> settlement. <br /> Access Cover Cover cannot be opened; one person Cover repaired to proper <br /> Damaged/Not cannot open the cover using normal working specifications or <br /> Working lifting pressure, corrosion/deformation of replaced. <br /> cover. <br /> Vault Structure Cracks wider than 1/2-inch or evidence Vault replaced or repairs made <br /> Includes Cracks of soil particles entering the structure so that vault meets design <br /> in Wall, Bottom, through the cracks, or specifications and is structurally <br /> Damage to maintenance/inspection personnel sound. <br /> Frame and/or determine that the vault is not structurally <br /> Top Slab sound. <br /> Cracks wider than 1/2-inch at the joint of Vault repaired so that no cracks <br /> any inlet/outlet pipe or evidence of soil exist wider than 1/4-inch at the <br /> particles entering through the cracks. joint of the inlet/outlet pipe. <br /> Baffles Baffles corroding, cracking warping, Baffles repaired or replaced to <br /> and/or showing signs of failure as specifications. <br /> determined by maintenance/inspection <br /> person. <br /> Access Ladder Ladder is corroded or deteriorated, not Ladder replaced or repaired and <br /> Damaged functioning properly, not securely meets specifications, and is <br /> attached to structure wall, missing rungs, safe to use as determined by <br /> cracks, and misaligned. inspection personnel. <br /> Below Ground Compost Media Drawdown of water through the media Media cartridges replaced. <br /> Cartridge Type takes longer than 1 hour, and/or overflow <br /> occurs frequently. <br /> Short Circuiting Flows do not properly enter filter Filter cartridges replaced. <br /> cartridges. <br /> February 2005 Volume V—Runoff Treatment BMPs 4-47 <br />