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Pa¢c 17of•11 <br />Pcrmit Na 1VA-003197-6 <br />�fodificatian I)atc: \q:i�- I 2007 <br />ti7. RECF.R'fNG ��'A'I'ER AND F:FFI.,UENI' S"fUDI' <br />l�he Permittce shall collect recciving water infomiation neccssap• to determine if thc <br />clllucnt has a rcason;ible potcntial to causc a viola�ion of thc �va�cr quality standards. If <br />rcasonable potential exisis, the Uepartmcnt �� ill use this inform�tion to calculatc efllucnt <br />limits. All sampiing and analysis shall bc conductcd in xcorJancc �eith thc guidclincs <br />gi��cn in Gnid�•lina.r anrl.S�,rrificnrioris fin• Prcpnrin,� �)unlih .l.c.cernnce Nroj��c� Plnn.c, <br />Ecology Publication 91-1G. 'I hc Pcrmiuce shall subrnit a Samplinc and Qualitp Assurancc <br />Plan for Dcpartmrnt revic�v and apprm�al by Aueust I, 2004. <br />A. f:flluenl AnalYsis <br />Thc Pcrmiucc shall analyzc thc ��asicwatcr Jischarec lor ihc samc paramctcn as, <br />and in accordancc with, S2. btonitorin� Requircmcnts. Onc of �hc samplc timcs <br />shall coincide �eith dtc recciving �aater stuJ}. All anal} sis lor mctals must use the <br />mcthods ci��cn in 40 CFR part 13ti and he rcportcd as total rccovcrablc. "I hc <br />f'crmittcc shoulJ usc �hc cican sampling guidancc for colicction of mctals �amples. <br />B. Kcccivin� 1��alcr An,ihsis <br />I�hc PcnniUcc shall cnnduci a rccci� ing ��'atcr anal�sis study that considc. ; thc <br />paramctcrs spccilicd in S2. Monitorine Rcquircmcnts. �\'hcn conducting thc <br />stud}, thr Pcrmiucc may samplc and anal�ze thc recci��ing ��atcr for thc S2 <br />parameters, and in accordance ��i�h SZ. `1onitoring Requirements, or it mac use <br />Depanment-approved d;i�a a� specilicJ belo�v. In addi�iun �o the parameters lisled <br />in S2, thc Permittee shall ci[her s:unple anJ anah�c thc reccicing «�ater Ibr <br />salinih. us'ing an approecd FPA or S�1 mcthnd. or usc Dcp�rtmcnt-approved data <br />as specified below. r\II of the meials s�mpled Irom the rccei��ine �vater sh�ll bc <br />analtzcd for to�al rccu�crablc anJ Jissulved conccntrations. 'l hc timc of <br />sampling shali be as close as possiblr to the time of critical condilion. "I he <br />Pcrmiucc shall �i�llow thc cle;m sampling Icduiiyucs (,llcdiod f GG9: .tiumpin{� <br />.4�rihient li'nler Ji�r 7rucc hlcluls u! F.�P:! IYafi•r Qtrulilr Criterin L��rels. F.PA <br />Publicaiion �'o. 821-R')i-O±a. April 1995). I'hc sampiin4 stalion accurac}' <br />rcyuiremcnts are � 20 meters. 'I�hc recei�•ing ��ater sampling lucation should hc <br />iw�sidc thc zonc of inllucncc of thc elllurnt. 'I'hc Dcpartmcnt consiJcn tcn <br />rccci�-ing �vatcr samplcs to hc thc optimal data set and ti�ur to hc thc minimum. <br />�i�r Jctcrmining rcasonablc potcnti�l to causc a��iol;uion uf thc �catcr yuality <br />siandards. All chemical anal��sis shall hc conducicd according to mcthods givcn <br />in 40 CPR 13G. <br />Any subscyuent sampling and anail'sis shall also mccl thcsc rcyuircmcnic 1'hc <br />Permittee may conduc� a cooper;uive receiving w;iter study ���iih other NI'UI:S <br />Pcrmiuccs disrharging in thc samc vicinity. 'I hc Pcrmittcc sh�ll submit thc results <br />nf ihc study in a�eriUcn rcport to thc Dcpartmcnt hy Novcmbcr L 2005. <br />As approved by Ihc Ucpanmcnt, �hc Pcnnittcc may usc a�:�ilahlc Stcamboal Slough <br />nr lower Snohomish River w�tcr qualiq� information decclopcd hy ihe Departmcnt <br />uf Gcology or othcr NPDI:S permitted dischargers �o address �vhclher thc ctlluent <br />h:is a rcason;iblc potcntial to causc a violation of watcr yuality standards. <br />