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�s <br /> COLUMBIA ANALYTICAL SERVICES,INC - <br />+s QA/QC Report <br /> Client EMCON Associates Service Request. S950194 <br /> Project: ARCO Facihty No 2076/EMCON Project No 1775-220 01 Date Analyzed: 2/22195 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Units ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 25 6 102 85-115 <br /> Toluene 25 248 99 85-115 <br /> Ethylbenzene 25 24 9 100 85-115 <br /> Xylenes,Total 75 73 7 98 85-115 <br /> Gasoline 250 247 99 90-110 <br /> Approved By lapZDate <br /> IC V25AU060194 <br /> Page 6 <br /> 1921 Ringwood Avenue • Son Jose California 95131 • Telephone 4081437 2400 • Fox 4081437 9356 <br />