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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client EMCON Associates Service Request: 5950254 <br /> Project ARCO Facility No 2093 / E%ICON Project No 1775-706 01 Date Analvzed 3/9/95 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Cal►fomia DHS LOFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 25 2 10t 85-115 <br /> Toluene 25 242 97 85-115 <br /> Etlivlbenzenc 25 246 98 85-115 <br /> Xvlcncs Total 75 720 96 85-115 <br /> Gasoline 250 247 99 90-110 <br /> Approved By Date 3 <br /> ICV29ALAW194 <br /> Page 6 <br /> 1921 ltinowood Avenue San Jose California 95131 • TPleohone x08/407-2400 • Fox 4081437 9356 <br />