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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 14 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> QA/QC REPORT <br /> Attention Vic Cherven BTEX Analyzed 07-01-96 <br /> 1017 26th Street Matrix Water <br /> Sacramento, CA <br /> Project 96006/Valley Motors <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit 05 05 05 05 <br /> QA/QC PARAMETER <br /> iMatrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Laboratory Control Spike 10011/0 102% 102% 104% <br /> Laboratory Control Spike 98% 100% 100% 101% <br /> Duplicate <br /> ppb a parts per billion=ug/L=microgram per liter <br /> ND =Not detected. Compound(s)may be present at concentrations below the reporting(mut. <br /> All surrogate recoveries were within 30%of target values. <br /> Spikes&Spike Duplicates were each spiked with 250 ug BTEX standard <br /> ANALYTICAL PROCEDURES <br /> BTEX--Benzene,toluene,ethylbenzene,and total xylene isomers(BTEX)are measured by extraction using EPA Method 5030 followed by analysis <br /> using EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a phototonization detector(PID) <br /> 07-02-96 <br /> ab ratory Representative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certirkathan Na 1760) <br />