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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> PP ° <br /> Roseville, CA 95678 <br /> Phone#- (916) 773-3664 Fax#- (916) 773-4784 <br /> OA/OC REPORT <br /> Attention Mr Matthew Taylor Date Analyzed 08-12.96 <br /> Wallace-Kuhl & Associates Matnx Water <br /> 3050 Industrial Blvd <br /> West Sacramento, CA 95691 <br /> Project 2938 0311444 Manposa <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 /> Matrix Spike 102% 102% 104% 105% <br /> Matrix Spike 102% 102% 103% 104% <br /> Duplicate <br /> ppb=parts per billion=ug/L=microgram per liter <br /> ND =Not detected. Compound(s)may be present at concentrations below the reporting limit. <br /> All surrogate recoveries were within 30%of target values. <br /> Spikes&Spike Duplicates were each spiked with 250 ng BTEX standard <br /> ANALYTICAL PROCEDURES <br /> BTEX—Benzene toluene,ethvibenzene,and total xylene isomers(BTEX)are measured by extraction using EPA Method 5030 followed by analysts <br /> using EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a photolotnzatwn detector(PID) <br /> 08-26-96 <br /> ab ratory Representative Date Reported <br />