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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client EMCON Associates Date Received 09/02/93 <br /> Project EMCON Project No OG71-038 01 Service Request No SJ93-1101 <br /> r ARCO Facility No 2168 Sample Matrix Water <br /> 1 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> BTE <br /> EPA Methods 5030/8020 <br /> N9/L (ppb) <br /> 1 <br /> Date Analyzed 09/14/93 <br /> Percent Recovery <br /> Spike CAS <br /> Spike Sample Result Acceptance <br /> Analyte Level Result MS DMS MS DMS Criteria <br /> Benzene 25 ND 25 4 26 6 102 106 76-122 <br /> Toluene 25 ND 25 3 26 3 101 105 75-127 <br /> Ethylbenzene 25 ND 24 9 25 8 100 103 70-135 <br /> t <br /> Approved by Date ��3 <br /> f0.10 n.,. .,n.+ Avc.• o a C..,. Inco r..F F. nc,13 r_ _.--..-_ .nn ri n, n .nn - r_ ^n=.�+ •. �. <br />