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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Cquiva ServILLS Service Request S9901977 <br /> Project SAP 121258/Irnadent 88870583 Date Collected NA <br /> Sample Matrix Sol] Date Received NA <br /> Date Extracted 7/1199 <br /> Date Analyzed 7/1199 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> Sample Name SP-14AB COMP Units mg/Kg(ppm) <br /> Lab Code 59901977-050 MS, 59901977-050 DMS Basis Wet <br /> Test Notes <br /> Percent Recovery <br /> CAS Relative <br /> Pi ep Analysis Spike Level Sample Spike Result Acceptance Percent Result <br /> Analyte Method Method MRL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> Benzene EPA 5030 8020 0 005 05 05 ND 049 049 98 98 57-154 <1 <br /> Toluene LPA 5030 8020 0 005 05 0 5 0 007 0 50 049 99� 97 60-142 2 <br /> Ethylbenzene EPA 5030 8020 0 005 03 05 ND 048 048 96 96 46-150 <1 <br /> I <br /> Approved By Date <br /> DMSl020597p <br /> Page 37 <br />