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COLUMBIA ANALYTICAL SERVICES INC <br /> QA/QC Report <br /> Client: EMCON Service Request- S950620 <br /> Protect ARCO Facility No 2168/EMCON Project No 0805-146 04 Date Collected 5/12/95 <br /> Sample Matrix- Soil Date Received 5/15/95 <br /> Date Extracted NA <br />' Date Analyzed: 5/22/95 <br /> Matnx Spike/Duplicate Matnx Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> Units mg/Kg(ppm) <br />' As Received Basis <br /> Sample Name B-13 (18 5) <br />' Lab Code S950620-001 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Analvte MS DMS Result MS DMS MS DMS Linuts Difference <br />' Benzene 005 005 00183 0 062 0 067 88 97 57-154 7 <br /> Toluene 005 0 05 ND 0 052 0 053 104 106 60-142 2 <br /> Ethylbenzene 005 0 05 00104 0 059 0 061 97 101 46-150 4 <br /> 1 <br /> i <br /> r <br /> Approved By �11� Date % <br />' DMSI57060194 1 , <br /> 0620 XLS slBiema 5126745 Ps$a No <br />