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COLUMBIA ANALYTICAL SERVICES. INC <br /> QA/QC Report <br /> • Client EMCON Associates Date Received 11/01/93 <br /> Project• EMCON Project No OG71-038 01 Service Request No SJ93-1339 <br /> ARCO Facility No 2168 <br /> Initial Calibration Verification <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> N9/L {ppb} <br /> Date Analyzed 11/10/93 <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyle Value Result Recovery Criteria <br /> Benzene 25 28 4 114 85-115 <br /> • Toluene 25 281 112 85-115 <br /> Ethylbenzene 25 281 112 85-115 <br /> Total Xylenes 75 86 2 115 85-115 <br /> TPH as Gasoline 250 240 96 90-110 <br /> Approved by ( Q -Q I1; Date <br /> 4 o^), o.,..,. .,,,.,, „�,,,.., . �..., �..... ._��.. .. _ „� 13 <br />