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COLUMBIA ANALYTICALE <br /> S RVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Products Company Service Request: 5951234 <br /> ' Project: 1775-237.001 /TO# 17075.00/2186 Stockton Date Analvzed: 10/4/95 <br /> Initial Calibration Verification(ICV) Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/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 23.3 93 85-115 <br /> ' Toluene 25 23.3 93 85-115 <br /> Ethylbenzene 25 23.2 93 85-115 <br /> Xylenes, Total 75 71.4 95 85-115 <br /> Gasoline 250 235 94 90-110 <br /> 1 <br /> 1 <br /> IC V25A WU6019q <br /> Page 5 <br />