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COLUMBIA ANALYTICAL SERVICES, INC <br /> QAIQC Report <br /> Client EMCON Associates Date Received 08/04/93 <br /> Project EMCON Project No OG71-029 01 Service Request No SJ93 0960 <br /> ARCO Facility No 2130 Sample Matrix Water <br /> 1 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> 1 g9/L (ppb) <br /> Date Analyzed 08/10/93 <br /> 1 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> Benzene 25 ND 25 2 23 9 101 96 76-122 <br /> Toluene 25 ND 25 8 246 103 98 75-127 <br /> Ethylbenzene 25 ND 24 3 22 9 97 92 70-135 <br /> 1 <br /> r <br /> Approved by L L Date ✓��! �`��� <br />