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COLUMBIA ANALYTICAL SERVICES INC <br /> CA CC Peoort <br /> Client EMCON Associates Date Received 08/04/93 <br /> Project EMCON Project No 0G71 029 01 Service Request No SJ93-0960 <br /> ARCO Facility No 2130 <br /> Initial Calibration Verrtrcanon <br /> BTEX ano TPH as Gasoline <br /> EPA Methods 5030/802010HS LUFT Method <br /> ig L (ps)b? <br /> Date Analyzed 08/10/93 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recover Criteria <br /> Benzene 25 24 1 96 85-115 <br /> Toluene 25 24 9 100 85-115 <br /> Ethylbenzene 25 23 3 93 85-115 <br /> Total Xylenes 75 89 3 92 85-115 <br /> TPH as Gasoline 250 226 90 90-110 <br /> i <br /> Approved by �21 c / ( L L/ <br /> Date <br />