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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 fl <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> QA/QC REPORT <br /> Attention Mr Rich Premzic BTEX Analyzed 06-21-95 <br /> WALLACE KUHL & ASSOC Matrix Soil <br /> 3050 industrial Blvd. <br /> W. Sac, CA 95691 <br /> Project # 2923-04 <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPM PPM PPM PPM <br /> Reporting Limit 0 005 0 005 0 005 0 005 <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 104% 108% 104% 108% <br /> Matrix Spike 112% 112% 112% 112% <br /> Duplicate <br /> ppm = parts per million = mg/Kg = milligram per kilogram <br /> ND = Not detected Compound(s)may be present at concentrations below the reporting limit <br /> All surrogate reommncs were withm 3D%of target values <br /> Spikes&Spike DupLcates were each spiked rnth 250 ng BTEX standard_ <br /> ANALYTICAL PROCLDLgUES <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 8020 which utilizes a gas chromatograph(GC)equipped with a photoionization detector(PID) <br /> 07-11-95 <br /> bo atory Representative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LABS I5 CERTIFIED BY THE STATE OF CALIFORNIA <br /> DFP4RTMENT OF HEALTH SERVICES AS A HAZARDOUS WAS-11 TESTING LABORATORY <br /> (Certification No 1760) <br />