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r <br /> EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br />' �A/QC REPORT <br /> Attention Mr. John Juhrend BTEX Analyzed 05-17-95 <br /> GEOCON Matrix: Water <br />' 3235 Sunrise Blvd , #6 <br /> Rancho Cordova, CA 95742 <br /> Project S8100-06-11A <br />' Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br />' PPB PPB PPB PPB <br /> Reporting Linut: 0.5 05 0.5 05 <br /> tQA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br />' PERCENT RECOVERIES <br /> Matrix Spike 106% 106% 104% 1070/c <br /> Matrix Spike 92% 94% 94% 97% <br />' Duplicate <br />' ppb = parts per billion = ug/L = tmcrogram per liter <br /> ND = Not detected Compound(s)may be present at concentrations below the reporting limit <br />' All surropte rcoavettes were wdbm 30%of target valum <br /> Spa=&Spdw Duplicates were each silted anth 250 ng BTEX standard. <br /> ANALYnCAL PROCEDURES <br /> BTEX—Benzene,toluene,ethylbenzene,and total xylene isomers(BTEX)are measured by extraction using EPA Method 5030 followed <br />' by analysis using EPA Method 602 which uttltzes a gas chromatograph(GC) equipped with a phototonization detector(PID) <br />' 05-17-95 <br /> b story Representative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LASS IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br />' (Certification No 1760) <br />