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COLUMBIA ANALYTICAL SERVICES, INC <br /> OA/OC Report <br /> Client EMCON Associates Date Received 08/06/93 <br /> Project EMCON Project No OG71-019 01 Service Request No SJ93-0977 <br /> ARCO Facility No 2133 Sample Matrix Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> ug/L (ppb) <br /> Sample Name E-8 (223 <br /> Date Analyzed 08/16/93 <br /> Percent Recovery <br /> Spike CAS <br /> i Spike Sample Result Acceptance <br />�I Analyte Level Result MS DMS MS DMS Criteria <br /> Benzene 25 12 3 34 3 34 5 88 89 76-122 <br /> Toluene 25 ND 23 5 23 7 94 95 75-127 <br /> Ethylbenzene 25 2 3 24 2 24 6 88 89 70-135 <br /> Approved by bate <br />