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COLUMBIA ANALYTICAL SERVICES. INC <br /> . y <br /> Client EMCON Associates Date Received 04/24/92 <br /> Project EMCON Project No G71-19 01 Work Order # SJ92-0494 <br /> Arco Facility No 2133 Sample Matrix Water <br /> QA/QC Report <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> pg/L (ppb) <br /> Sample Name PR-1 (27) <br /> Date Analyzed 04/29/92 <br /> Percent Recovery <br /> Sample Spike Result Acceptance <br /> Analytes Swke Level Result M DMS MS DMS Criteria <br /> Benzene 25 ND 25 5 186 102 74 39-150 <br /> Toluene 25 ND 266 193 106 77 46-148 <br /> Ethylbenzene 25 ND 27 1 199 108 80 32-160 <br /> ND None Detected at or above the method reporting limit <br /> Approved by � /ldDate <br /> 9 <br /> f.,rf, n,^ oS4'14 • TPlprhr^P 40AJdJ7 idr1n • r-y JOA/A17 0356 <br />