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• July 15, 200R <br /> . iIWAI'rojcctNo.2008-080-22 <br /> Notoe: <br /> Bold—Analyte detected <br /> BoIdlHfghllghted—Sample concentratlon greater than MTCA Melhod A soil cleanup level <br /> <—Not detected al glven reporting Ilmits <br /> MTCA A—Ecology Chepter 173-340 WAC MTCA Melhod A soil cleanup levels, shown for <br /> roference only <br /> Conccntrations of dicscl ai�d/or oil-rnngc pelrolcum hydrocarbuns wero delcctcd in iiie <br /> majority of thc slockpilc soil sampled. Most results were beluw MTCA Mcthod A <br /> ? cle�nup Icvcls foc petrolcum hydrocEirbons cxcept snmple Sl'-I3-3,which contflined dicscl <br /> r,mge pctroleum at thc clennup lo•�cl of 2,000 mg/kg. Gnsolinc range peU•olcnm was <br /> dctccted iu two stockpilc samples,bul nt conccutrntions Uelow the MTCA cicanup level. <br /> Arscnic wns dctccicd in 35 snmples,and Iced wes detected in all 38 samples. Arsenic <br /> wns dclected nbovc cicnnup Icvcls in tlu•cc samples(SP-B-1, SP-�-4,and SP-r-7),nitd <br /> Icud wns detected lbove cleanup]evels in one sample(SP-C-4). <br /> 13nsed on the stockpile sampling nt thc site,the stockpiled soils from Stocicpiles `A' <br /> through `G' nrc clnssificd ns `Class 3' soils for pi:troleum by B�ology. 'Chcsc soils may <br /> be used�s backfill on site. Iiowever,these soils will contain haznrdous substmices abovc <br /> clennup levels. If tlie soils nre exported off-site,approprinle end uses iuclude: droutment, <br /> subgradc materinl f'or roads or parking lot caistniction,or olTsitc disposnl or usc at <br /> permitted municipnl or pctrolcwn contciminutcd soils landfills (i:cology, l J95). <br /> A copy of thc IaUoratory auailyt��;�i ���ti���i�tin�,��ia t�� n��,��a��t��>>������ns r:���i�c��� r�,• <br /> tlieir referencc. <br /> LIMI'1'A'CIONS <br /> 'fhe conclusious cxpresscd by 1[WA urc basud solcly on nr,llcrinl refa•cnced in lhis <br /> report. Obscrvations wcrc madc undcr thc conditions slalcd. Witliin thc ]imilntions of <br /> scope,schedidc anJ budgct, I IWA altcmpled lo exccutc thcse services in uccordancc with <br /> gencrnlly neccpt:d prot'cs:;ionnl principics und praclices in tlie ni�:a.il tlic limc the rcpa•l <br /> was prcpiu'cd, No ���.urnnly, cxpresscd or intplicd, iti madu. I;xpericncc hns shown thfit <br /> subsurf icc soil and ground wtdcr conditions cnn vary significantly ovcr sm,dl distanccs. <br /> lt is nhvays possiblc that coutnminnliun may cxist in nrcas that wcrc not samplcd. <br /> [I WA's flndings imd couclusions nmst not bc considei�ed �s scicntific or engincering <br /> ccH�iinlics, �llll 1.11I1(;1'FIS OLII'jll'OrCSS10110.I OpI01011 COIICCI'llltls lI1C SlgilIEICAIICC Of If1C <br /> limitcd dntn gnthcred and interprctcd duriug the course of the:issessment. <br /> 'l'his sludy end repm•t hnvc Uecn prepnred on belinlf of Wildcr ConsUuction und Sound <br /> 'Crxnsit, Cor tlie spucitic nppticetion to tl�e subject property. 'I'iiis report and the fiudittgs <br /> coulained herein shnll not, in wliole or purt,bc disscminnted or conveycd to auy oQicr <br /> pnrly tvitliout prior�vrilten consent of I-IWA. We nre not responsiUle for the impncls of <br /> aey chnnges iu cnvironmcntfd sitmderds,practiccs, or icgul�tions suUscqucnt to <br /> Stockpllc memo 3 I1WA GL'OSCIiiNCFS INC, <br /> 7D <br />