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COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> iClient EMCON Associates Date Received 08/26/93 <br /> Project EMCON Project No OG71-01 7 01 Service Request No SJ93-1055 <br /> ARCO Facility No 434 <br /> Initial Calibration Verification <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> ug/L (ppb) <br /> Date Analyzed 09/01/93 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Criteria <br /> Benzene 25 25 5 102 85-115 <br /> Toluene 25 25 7 103 85-115 <br /> Ethylbenzene 25 26 1 104 85-115 <br /> Total Xylenes 75 764 102 85-115 <br /> TPH as Gasoline 250 238 95 90-110 <br /> Approved by !f W v Date <br /> 1071 Rine)wnnti Avan iia • Snn ince fnIirnmin 05481 • Taionhn—rA AAIA17 ')Ar)n A IA'l7 011;A <br />