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COLUMBIA ANALYTICAL SERVICES. INC <br /> QA/QC ReportClient EMCON Service Request 5950708 <br /> Project ARCO FacilaN No 2133 /EMCON Project No 1775-709 001 Date Collected 6/1 2/95 <br /> Sample Matnx Vater Date Received. 6/6/95 <br /> Date Extracted NA <br /> Date Analvzed 6/13/95 <br /> Matrix Spike/Duplicate Matrix Spike Sumrnary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Units ug/L(ppb) <br /> Sample Name BHD-1 (27) <br /> Lab Code 5950708-003 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Simple Spike Result Acceptance Percent <br /> Analyte MS DMS Result MS DMS �L15 DMS Limits Drffcrcnee <br /> Benzene 250 250 97 309 310 85 85 75-135 <1 <br /> Toluene 250 250 ND 208 214 83 86 73-136 3 <br /> Ethylbcnzenc 250 250 369 580 586 84 87 69-142 1 <br /> Approved BN ✓ Date 11191yr <br /> D%MSI060194 <br /> 9507M XLS d19ry5 Page No O <br />