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I hc comhincJ dala I�rom Ihc h�o ficid sitcs rcportcd in this 17:I:R (I lcritagc Markctplacc <br /> ;md Lakc Stcvcns) indicalc ihat Ihc performance ofn Storml ilicr sys�ctn configurcd ti�r <br /> inlinc hypass��ith 'l.PG media and n h}draulic loading ratc of I gpm/�l' oftncdia surlacc <br /> area mccts liculogy per!ixmancc goals liir 13asic l rcatmcnt. <br /> 7'cchnicnl Itc�•icw Cammillcc RecomrocnJotions: <br /> I hc 'I'RC, hascd on thc�ccight of�hc cviJcncc and using its bcst prolessional judgmcnt. <br /> tinds�hat: <br /> • titormPihcr, using 7.PG mcdia nnd operating at no mnrc than a h�draulic loading ratc <br /> of I gpm/li' of mcJia surfacc arca. is cspcctcd �n providc cflcctivc stonmvatcr <br /> trcmmcnt achicving licolagy's Ilasic'Ireatincnl'ftiS rcmuval perfi�nnancc goals, as <br /> JcrnunstratcJ hy IicIJ anJ labomtor� tcsting perli�rmcd in accurdancc �cith thc <br /> protocol; unJ. Siorml iltcr' is Jccmcd satisfactoq ��iih respcct to factors othcr than <br /> trcatmcnt perliimiancc(c.g.. maintcnancc: scc lhc pro�ncol's Appcndix I3 lor <br /> cumplcic lisl). <br /> Findin�;s uf Fncl: <br /> • Inllurnt 'I'tiS cnnccntralions anJ parlidc sizc Jislribu�ions wcrc gcncrall� ���ithin Ihe <br /> rangc of�chai �voulJ hc eunsiJcrcJ "typical" fi�r��cstcm \Vashington (sill to silt <br /> I omn). <br /> • 'I hirt�-t�cu�32) storm cvcnis ��cre samplcd at h�u sitcs fiir storms Gom April 2003 io <br /> March 2004. ul'�chich h�cnly-I��o (22) �vcrc dccmcd "yualiticd"and ��cre ihcrcfixc <br /> includcJ in Ihc Jata anal�sis sct. <br /> . titalislical anahsis o(Ihcsc ?2 stunn c�cnls vcrilics thc Jata sct's ndcyuac�. <br /> • Anal�iing all 22 yualilj ing rccnts. thc arcragc inllucn� and ct7lucnt conccntrnlions <br /> anJ aggrcg;uc pi,llutant IuaJ rcJucliun arc I 14 mg/1.. ?5 mg/I., anJ R2%. <br /> respcc�i�cl}. <br /> • :�nahzing all '_'_ qualil)ing crcnts hascJ ou thc��s�in�urrd�n�rrr��;e flo�c ratc Juring <br /> �hc cvcn� Ivcrsu� ihc nu��ccurrd pruk Ilo�v ratc). anJ murc hea�ilp �ecighting thosc <br /> c�rnls ncar �hc�Icsign rnt. �vcrsus cccnts cilhcr lar aho�c or��cll hclo�� thc Jcsign <br /> ralcl Jucs nul signilic�utU) a�7ccl Ihc rcpurtcJ results. <br /> • Por ihr 7 yualilcing c�rnis�cith inllucnt l titi conccntratiuns grca�cr than 100 tng/I.. <br /> thc a�rragc inllucnt anJ clllucm conccntr:uiuns anJ aggrcgalc pollutant luad <br /> rcJuctiun arc ?d I mg%I.. 3d mg/I., anJ R9",b, respcclivcl�. If Ihc 2 of 7 cvcnls thal <br /> ��cceJ thc maxinwm 3oU mp/L spccilicJ in I:col�,g�'s guidclincs arc culuJcJ. thc <br /> a�cragc inllucnt and cillucnt ronccnlrati�ms and a�grcgatc pullulant load reJuction <br /> :�rc I58 mgil.. 35 mgil.. ;mJ 7R"�. respcc�iccl�. <br /> . fur Ihc I S yualilj ing c�cnts ��ith intlucnt 'I SS cunccnlrations Icss than 100 mg/I.. lhc <br /> a�rragc inllucnl anJ clllucnl concrnUatiuns and aggrcgalc pollutanl load reduction <br /> arc S$ nt�'I.. _'ll m�%I.. :md 61°u. respccli�cl�. If lhc 6 of I S cvcnls Iha� fall hclo�ti Ihc <br /> ininimum 11 ing%1_ "I ti5 spccilicd in I.cnlag�'s guiJclincs arc c�cludcJ. Ihc aecragc <br /> inllucnt anJ cillurnl cunccntralii,ns:mJ aEFrcgatc pullut:mt Io:�J rcduc�irni arc 7!t <br /> mg I.. '_6 mg!I.. anJ 67"�,. rcs��cc�i�rlc. <br /> s <br /> ��,,� J f�; <br />