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Lim <br /> COLUMBIA ANALYTICAL SERVICES, INC G <br /> QA/QC Report <br /> Client: EMCON Associates Date Received 03/12/93 <br /> Project: EMCON Project No OG71-038 01 Service Request No., SJ93-0368 <br /> ARCO Facility No 2168 Sample Matnx- Water <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> yg/L (ppb) <br /> Date Analyzed 03/19/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> Benzene 25 NO 266 26 9 106 108 39-150 <br /> Toluene 25 NO 258 26 3 103 105 46-148 <br /> Ethylbenzene 25 ND 25 1 25 9 100 104 32-160 <br /> ND None Detected at or above the method reporting lima <br /> Approved by. Date: 1%1�4 <br />