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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client ARCO Products Companv Service Request 5950941 <br /> Project 1775-706 001/T0�" 17075 0012093 Tracv Date Collected. 7/27/95 <br /> Sample Matrix Water Date Received 7/28/95 <br /> Date Extracted NA <br /> Date Analyzed 8/3/95 <br /> Matn\ Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Units ug/L (ppb) <br /> Sample Name Batch QC <br /> Lab Code S950936-001 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Simple Spike Result Acceptance Percent <br /> Analyte NIS DMS Result NIS DMS '1S DMS Limits Difference <br /> Benzene 25 25 ND 255 25 1 102 100 75-135 2 <br /> Toluene 25 25 ND 243 23 8 97 95 73-136 2 <br /> Ethvlbenzene 25 25 ND 243 23 8 97 95 69-142 2 <br /> r <br /> Approved By Date 0 <br /> ouslsroeai9a <br /> Page 5 <br />