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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 0 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> QA/OC REPORT <br /> Attention Mr Rich Premzic BTEX Analyzed 06-22-95 <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 1.04% 104% 104% 108% <br /> Matrix Spike 100% 100% 96% 98% <br /> Duplicate <br /> ppm = parts per million = mg/Kg = milligram per kilogram <br /> ND = Not detected Compourd(s) may be present at concentrations below the reporting limit <br /> All surrogate reemerms were wtthm 30%of target values <br /> Spikes&Spike Duphmtes were each spiked Rath 250 ng BTEX standard <br /> ANALYTICAL PROCFMURES <br /> BIEX—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 photoionezatton detector(PTD) <br /> _07-11-95 <br /> (La ratory Representative Date Reported <br /> EXCELCHEM EN'VIRUNMIrN'TAI LABS IS CER11I7ED BY THE STATE OF CALIFORNIA I <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (CertlflLatlon No 17W) <br />