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COLUMBIA A�tiALYTICAL SERVICES,INC <br /> Q A/QC Repoli <br /> Client- irMCON Service Request* 5951018 <br /> Project. 1775-212 001 /TO# 17075 00/ 760 Loaf Date Collected 8111/95 <br /> Sample Matrix Nater Date Received 8116/95 <br /> Date Extracted: NA <br /> Date Analyzed- 8124/95 <br /> Matrix 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 595101 1-010 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Analyte MS DMS Result MS DMS MS DMS Limits Difference <br /> Benzene 125 125 VD 119 121 95 97 75-135 2 <br /> Toluene 125 125 3 2 115 119 89 93 73_136 3 <br /> Ethvlbenzene 125 125 \1D 114 116 91 93 69-142 2 <br />• <br /> DMSISl060194 <br /> Page 10 <br />