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• <br /> No. 18—Catchbasin Inserts <br /> Maintenance Defect Conditions When Maintenance is Results Expected When <br /> Component Needed Maintenance is Performed <br /> General Sediment When sediment forms a cap over the No sediment cap on the insert <br /> Accumulation insert media of the insert and/or unit. media and its unit. <br /> Trash and Trash and debris accumulates on insert Trash and debris removed <br /> Debris unit creating a blockage/restriction. from insert unit. Runoff freely <br /> Accumulation flows into catch basin. <br /> Media Insert Not Effluent water from media insert has a Effluent water from media <br /> Removing Oil visible sheen. insert is free of oils and has no <br /> visible sheen. <br /> Media Insert Catch basin insert is saturated with water Remove and replace media <br /> Water Saturated and no longer has the capacity to insert <br /> absorb. <br /> Media Insert-Oil Media oil saturated due to petroleum spill Remove and replace media <br /> Saturated that drains into catch basin. insert. <br /> Media Insert Use Media has been used beyond the typical Remove and replace media at <br /> Beyond Normal average life of media insert product. regular intervals,depending on <br /> Product Life insert product. <br /> Volume V—Runoff Treatment BMPs—December 2014 <br /> 4-51 <br /> ♦i.... s_.a.L:_ nnr c-_� __ ___i:__.:__ •L._a:_ __a I: .4 i_ _-:_a a_ __.._nnr __:_a_- /Lai....ii......... __..__.ar__.,.., <br />