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COLUMBIA ANALYTICAL SERVICES. INC <br /> Client EMCON Associates Date Received 07/14/92 <br /> Project' EMCON Project No G71-18 01 Work Order# SJ92-0856 <br /> • Arco Facility No 2093 Sample Matrix Water <br /> QA/QC Report <br /> Matrix Spike/Duplicate Matnx Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> yg/L (Ppb) <br /> Sample Name ATR-1 (27) <br /> Date Analyzed 07/17/92 <br /> Percent Recovery <br /> Sample Spike Result Acceptance <br /> Analytes Spike Levei Result MS DMS M5 DMS Critena <br /> Benzene 25 ND 302 28.4 121 114 39-150 <br /> Toluene 25 ND 304 286 122 114 46-148 <br /> Ethylbenzene 25 06 31 3 294 123. 115 32-160 <br /> ND None Detected at or above the method reporting limit <br /> i r <br /> Approved by Date (J 2 <br /> 9 <br /> 1071 Q,nnwnnr{ Ave, .c 0 C., hc, F i r,., p e.n I • T 1 L_ I r» n inn r -- - <br />