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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Date Received 11/19/93 <br /> Project EMCON Project No OG71-017 01 Service Request No SJ93-1434 <br /> ARCO Facility No 434 Sample Matrix Water <br /> I <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Pg/L (ppb) <br /> Sample Name W-8 (69) <br /> Date Analyzed 11/24/93 <br /> P e r c e n t R e c o v e r y <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte, Level Result MS DMS MS DMS Criteria <br /> Benzene 25 NO 26 3 27 4 105 110 76 122 <br /> Toluene 25 NO 26 1 27 1 104 108 75 127 <br /> Ethylbenzene 25 NO 26 5 27 6 106 110 70-135 <br /> Approved by v` � Date Mu4o,— <br /> 1n ., rr.l s„ na4 '1. <br />