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COLUMBIA ANALYTICAL SERVICES, INC a ;' <br /> QA/QC Report <br /> . Client. EMCON Associates Date Received 10/28/93 <br /> I Project: EMCON Project No OG71-050 01 Service Request No SJ93-1325 <br /> ARCO Facility No 2076 Sample Matrix Water <br /> I <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> I �ug/L (ppb) <br /> I Date Analyzed 11/05/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> Benzene 25 ND 28 1 29 8 112 119 76-122 <br /> Toluene 25 ND 28 2 30 1 113 120 75-127 <br /> Ethylbenzene 25 ND 28 2 29 8 113 119 70-135 <br /> Approved by �/ F- .t — ._ Date //—/0 <br /> 7 <br />