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EXCELCH EM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax#- (916) 773-4784 <br /> !QA/OC REPORT <br /> Attention Mr Michael Watan Date Analyzed 11-22-96 <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 /> Ile2ortirig Limit 0 5 0 5 0 5 05 <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 960/a 96% 98% 102% <br /> Matrix Spike 93% 93% 94% 98% <br /> Duplicate <br /> ppb=parts per billion=uglL=microgram per later <br /> ND =Not detected Compound(s)tray be present at concentrations below the reporting IMUL <br /> All surrogate recoveries were within 30%of target values. <br /> Spikes&Spike Duplicates were each spiked with 250 ng BTEX standard <br /> ANALYTICAL PROCEDURNS <br /> BTEX—Benzene,toluene cthylbettzene,and total xylene isomers(STEN)are measured by extraction using EPA Method 3030 followed by analysts <br /> ugnng EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a phototoni ation detector(PID) <br /> • 11-25-96 <br /> (7o;at.- epresentative Date Reported <br /> EXC£LCHEM EIV VIRONMENTAL LABS IS CERTIFIED BY THESi'ATE OF CALIFOWNIA <br /> DEPARTMENT OP HEALTH SERVICES ASA HAZARDOUS WASiETFS[INC LABORATORY <br /> (Certification Na 1760 2119) <br />