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it+,U"• <br /> .A COLUMBIA ANALYTICAL SERVICE NC. <br /> QA/QC Report <br /> Client: ARCO Products Companv 59600232 S9600231 <br /> Project 1775-206 002/TO#19350 00 / 548 Stockton Date Collected 2/2/96 <br /> Sample Matrix Water Date Received- 2/6/96 <br /> Date Extracted NA <br /> Date Analyzed: 2/12,14/1996 <br /> Matrix Spike/Dupltcate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Units ug/L(ppb) <br /> Sample Name MW-1(56) <br /> Lab Code S9600232-001 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Andlvte MS DMS Result MS DMS MS DMS Limits Difference <br /> Benzene 25 25 ND 250 253 100 l01 75-135 1 <br /> Toluene 25 25 ND 25 1 254 t00 102 73-136 1 <br /> Ethvlbcnzene 25 25 ND 25 0 255 100 102 69-142 2 <br /> UMS1S1060194 Page 6 <br />