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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/'QC Report <br />• Client: EMCON Associates Date Received: 12/22/93 <br /> Project: EMCON Project No. OG71.033.01 Service Request No.: SJ93-1565 <br /> ARCO Facility No. 548 <br />• <br /> Initial Calibration Verification <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br />• /rgiL (ppb) <br /> Date Analyzed: 12/27/93 <br />• <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Criteria <br />• Benzene 25. 24.6 98. 85.115 <br /> Toluene 25. 24.1 96. 85-115 <br /> Ethylbenzene 25. 23.9 95. 85-1 15 <br /> Total Xylenes 75. 71 .9 96. 85-115 <br /> TPH as Gasoline 250, 248. 99. 90-110 <br />• <br />• <br />• <br />• e <br />• Approved by: r ,G,�. Date: <br /> 1.0 <br />