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WATER QUALITY TREATMENT FACILITIES <br />Water quality �eatment facilities will consist of a deep cell and a wedand treatment cell. <br />The deep cell will be situated underground in a wet vault which is sized to contain 85 <br />percent of the runoff volume for the 6-month, 24hour design storm event for developed <br />conditions. ihe wetland treatment cell is situated above ground and has Seen sized to <br />hold 15 percent of the volume for the 6-month, 24-hour design storm event for developed <br />conditions. The water quatity facilitie at avement runoff only aed to <br />not collect aad treat runo e proposed and firture roo �a3�'1 ��` <br />Two pipe azch tanks aze proposed to provide storage for th� deep cell portion of the water <br />quality �eatment sy,stem. Each cell is l0U feet long and provides a storage pool of less <br />ihan 6'. The deep cells will discharge into the wetlandtreaRnentcell which has a has a <br />permanent pool depth of 2.5 feet: The wetland treatment cell will discharge into the <br />detention tank syscem. <br />The following parameters were used to design the water quality treaRnent facilities (see' / <br />aPPendix): � �+ i <br />Developed impervious azea - pavemen 2 a5 acres/C1V 98 A <br />l�,'L� ��. <br />Developr.dperviousarea—landscape 0.34,acreslCN86 � <br />Rainfall — 6 month 0.99" <br />� ' <br />Deva%ped To 6.3 min (default rri�nimum) <br />Runoff volume — 6 month <br />See n�7- <br />. ��Rgt <br />7185 cf <br />r) 1 <br />J <br />��I <br />0 , <br />u��y�. <br />.. �e� <br />�'� <br />�� <br />a' � '� <br />!� �r , � ,- � <br />I� � � ��y� � �ti�• � <br />�� <br />� �4�a�� �� <br />�� <br />.�'�``�` � <br />� <br />