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t� <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> M <br /> QA/QC Report <br /> Client: EMCON Associates Date Received 01/29/93 <br /> Project EMCON Project No OG71-019 01 Service Request No SJ93-0122 <br /> ARCO Facility No 2133 <br /> Initial Calibration Verification <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/DHS LUFT Method <br /> Nanograms <br /> Date Analyzed 02/05/93 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Criteria <br /> Benzene 250. 255 102 85-115 <br /> Toluene 250. 260 104. 85-115 <br /> Ethylbenzene 250 258 103 85-115 <br /> Total Xylenes 750. 750 100 85-115 <br /> TPH as Gasoline 2,500 2,452 98. 90-110 <br /> Date Analyzed. 02/08/93 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Criteria <br /> Benzene 250. 235. 94 85-115 <br /> Toluene 250. 249 100. 85-115 <br /> Ethylbenzene 250. 238. 95 85-115 <br /> Total Xylenes 750 696. 92 85-115 <br /> TPH as Gasoline 2,500 2,447 98. 90-110 <br /> TPH Total Petroleum Hydrocarbons <br /> i <br /> Approved by* Date. �TwV t ?, r <br /> 10 <br />