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�,: , <br /> „ , , , <br /> f: f II I. 0 f f Oclobcr 2007 <br /> GI?NI?RAL Util? I.I�.VI?L DI:tiIGNA7'ION POR PRI?'I'RI?A'T�tl:NT ('I'SS) <br /> Fur <br /> CONTI:CIi titorma�alcr tiolutions Inc. CUS" S�'sicm <br /> Tcnloe��'s Dccision: <br /> 13uscd on Ihc CONTGCII Storma�utcr Solutions Inc. (CONTECH) npplicutiun <br /> suhmissions far lBc CUS� Sy�slcm and recommendulions by thc Technicul Revicw <br /> Coromittcc(TRC), Lcolog}� hcreby issucs t6c follu��ing usc dcsignations for ihc <br /> CDS stormwulcr trcutment systcm: <br /> 1. Cencrui Use Lcvcl Designnfion (GULll) for prclrenlmcnt usc, as defincd in the EcoloRry <br /> Starmrrutcr 111unugemcnt D1anuul for�Vcstcrn Nashington Volumc V, (a) uhcad of <br /> infiltration trcatmcnt, or(b) lo protcct anJ extcnd thc mnintcnancc cycic uf a busic or <br /> enhunccd trcatmcnt Jc��icc(c.g.,sanJ or mcJin filtcr). This CULD npplies to 2400 <br /> micron scrcen CUS� units siicd per lhc tublc bclow ut Ihc�Vutcr Quality dcsign ilow <br /> rulc us dctcrmincJ using thc Westcrn 1Vashington Ilydrulop� Modcl (W�VHM). Thc <br /> followin{; tublc shnws Ilo�rr:�ics axsocinted ��ith��arious CUS madcls: <br /> �Vusliin�tun Stutc S��sicm Sizin� <br /> Dcsign Trcutment Flowrutc <br /> CDti �lndcl IU cfs <br /> I'MI1120-15 0.7 <br /> I'MSU20-15-4 0.7 <br /> VMSU20-IS 0.7 <br /> P�1SU2�20 1.1 <br /> PMSU20•25 1.G <br /> PI�4SU3(1-20 2 <br /> VMSU30-30 3 <br /> I'MSU40-30 4.5 <br /> PA1SUa0-d0 G <br /> PS1UC30-20 2 <br /> P5 W 30-30 3 <br /> PtiNC30-30 3 <br /> I'S��'C40-30 4.5 <br /> 1'S\VC40•a0 � <br /> I'511�50-42 9 <br /> Pti\�'CSG-d0 9 <br /> ) <br />