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�lshbcrn "I'o��nhomcs <br />7. WATER QUALITY DESIGN CRITERIA <br />Por a multi-residencc projcct with grcatcr than 10,000 sf of proposcd <br />pavcmcnt, thc watcr quality BMI' may bc addressccl �vith the nc�vly approvcd `Storm <br />riltcr devica According to tlic calculatcd dcsign runoff of 0.05 cls, a 2-cartridgc <br />unit offcrs thc rcquired throughput of stonn waicr runoff volume. <br />It is not practical for rcasons of lopography. �illowed dcnsity, soil conditions, ctc. to <br />disposc of thc dcsign volinnc of runoff by infiltration. For lhc instani pmjcct, <br />conditions arc as follows: <br />For the Ashbyrn Tm��nhomes ��,����s:,i, ihe total dcvcloped 6-month volumc is <br />853 CF. <br />A Vortccnics Ayua-S�� irl will pro��iJc thc prc-trr.iUncnt fiir thc drivcway runotT, l�hc <br />D.O.1�.. has approvcd this typc of trcatmcnt ���ith thc "gcncra! usc dcsignalion" nf <br />storm �vater pre-trcatmcnt. <br />�� 2-caru•idgc 'Storm Piltcr' �iro��idcs thc final ���atcr quality bclore entcring thc <br />tIC(CO1i017 5\'StCilt. <br />����:� O�-1'} � -�� � � <br />