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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 e <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> OA/QC REPORT <br /> Attention Mr Michael Watan Date Analyzed 03-25-97 <br /> Wallace-Kuhl & Associates Matrix Water <br /> 3050 Industrial Blvd <br /> West Sacramento, CA 95691 <br /> Project 2556 04/26485 Thornton Rd <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit 0 5 0 5 0 5 0 5 <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Laboratory Control Spike 96% 99% 101% 101% <br /> Laboratory Control Spike 97% 100% 102% 102% <br /> Duplicate <br /> ppb=parts pLr billion=uglL=microgram per liter <br /> ND -Not det,cted Compound(s)may be present at concentrations below the r,portmg limit <br /> All surrogate recoveries were within 30%of target values <br /> Spikes&Spike Duplicates were each spiked with 250 ng 13TH\standard <br /> ANALY r[CAL PROD DURtS <br /> B I h\ •13%Ivent ,toluen< .thylbcnuen%,and tutai xylene Isomers(13Tr\)are measured by,x1ractlon using EPA Method 5030 followed by analysis <br /> using I PA Method 602 which utlliz"a gas Orornatograph((rC)�qulppcd with a photowm/atlon detector(111D) <br /> I <br /> 03-28-97_ <br /> loratory Representative Date Repotted <br /> LXU1(1 it M I NVILUNMI N rAI lANS!tic Fh]II II 1)11t1IP SIM 1101(At It ORNIA <br /> Ulf'At,'Ihtl'V'It'I IIIA[ IIIYRVI(11,ti5AIIA/A hk) <br /> lts Asti rl" IN1,1.AISO KAJO RY <br /> -",,n N,, 17on 2119) <br />