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No.18 - Catchbasin Inserts <br />r i <br />t <br />ter ' <br />x� <br />General <br />Sediment <br />When sediment forms a cap over the <br />No sediment cap on the insert <br />Accumulation <br />insert media of the insert and/or unit. <br />media and its unit. <br />Trash and <br />Trash and debris accumulates on insert <br />Trash and debris removed <br />Debris <br />unit creating a blockage/restriction. <br />from insert unit. Runoff freely <br />Accumulation <br />flows into catch basin. <br />Media Insert Not <br />Effluent water from media insert has a <br />Effluent water from media <br />Removing Oil <br />visible sheen. <br />insert is free of oils and has no <br />visible sheen. <br />Media Insert <br />Catch basin insert is saturated with water <br />Remove and replace media <br />Water Saturated <br />and no longer has the capacity to <br />insert <br />absorb. <br />Media Insert -Oil <br />Media oil saturated due to petroleum spill <br />Remove and replace media <br />Saturated <br />that drains into catch basin. <br />insert. <br />Media Insert Use <br />Media has been used beyond the typical <br />Remove and replace media at <br />Beyond Normal <br />average life of media insert product. <br />regular intervals, depending on <br />Product Life <br />I <br />I insert product. <br />4-50 Volume V — Runoff Treatment BMPs February 2005 <br />