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•, COLUMBIA ANALYTICAL SERVICES. INC. = <br /> Client: EMCON Associates Date Received: 09/09/92 <br /> . Project: EMCON Project No. G71-33.01 Work Order #: SJ92-1 126 <br />• Arco Facility No. 548 <br /> QA/QC Report <br /> Initial Calibration Verification <br /> a)! BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Nanograms <br /> Date Analyzed: 09/10/92 <br />• CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Resull Recovery Criteria <br /> Benzene 250. 256. 103. 85-115 <br /> Toluene 250. 269. 108. 85-115 <br /> Ethylbenzene 250. 266. 107. 85-115 <br /> Total Xylenes 750. 840. 112. 85-115 <br /> TPH as Gasoline 2,500. 2,311 92. 90-110 <br />• <br /> Date Analyzed: 09/14/92 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovenr Criteria <br /> Benzene 250. 260. 104. 85-115 <br /> Toluene 250. 280. 112. 85-115 <br /> Ethylbenzene 250. 273. 109. 85-115 <br /> Total Xylenes 750. 840. 112. 85-115 <br /> TPH as Gasoline 2,500. 2,705 108. 90-110 <br /> TPH Total Petroleum Hydrocarbons <br />• <br /> Approved by Date_ <br />• <br /> 5 <br />