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COLUMBIA ANALYTICAL SERVICES -"C. <br /> QA/QC Report <br /> Client: Equiva Services Service Request: S9901977 <br /> Project: SAP:121258/Incident:88870583 Date Collected: NA <br /> Sample Matrix: Soil Date Received: NA <br /> Date Extracted: 7/1/99 <br /> Date Analyzed: 7/1/99 <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, S9901977-050 DMS Basis: Wet <br /> Test Notes: <br /> Percent Recovery <br /> CAS Relative <br /> Prep Analvsis Spike Level Sample Spike Result Acceptance Percent Result <br /> Analvte Method Method MRL MS DMS Result MS DMS MS DMS Limits Difference Notes <br /> Benzene EPA 5030 8020 0.005 OS 0.5 ND 0.49 0.49 98 98 57-154 <1 <br /> Toluene EPA 5030 8020 0.005 OS 0.5 0.007 0.50 0.49 99 97 60-142 2 <br /> Ethylbenzene EPA 5030 8020 0.005 OS 0.5 ND 0.48 0.48 96 96 46-150 <1 <br /> Approved By: Date: <br /> DMS/020597p <br /> Page 37 <br />