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I <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> • Client EMCON Associates Date Received 08/20/93 <br /> Project EMCON Project No OG71-050 01 Service Request No SJ93-1035 <br /> ARCO Facility No 2076 <br /> 1 <br /> Initial Calibration Verification <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> ,rg/L (ppb) <br /> Date Analyzed 08/26/93 <br /> r <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> • Analyte Value Result Recovery Criteria <br /> r Benzene 25 23 1 92 85-115 <br /> Toluene 25 23 7 95 85-115 <br /> Ethylbenzene 25 23 0 92 85-115 <br /> Total Xylenes 75 67 2 67 85-115 <br /> TPH as Gasoline 250 261 104 90-110 <br /> 1 <br /> • <br /> Approved by Date Z <br /> +O']a C?.-- ....4 n n.. ., t..., il,.., r,-ir.. nc.G. <br />