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�1 <br /> COLUMBIA ANALYTICAL SERVICES. INC. <br /> QA/QC Report <br /> Client: ARCO Service Request: 59600288 <br /> Prniect: 2186 Stockton / #21775-237.002 /TO#19350.1)0 Date Analyzed: 2/26/96 <br /> Initial Calibration Verification(ICV) Surnmary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/9020/California DHS LL`FT Method <br /> Units: ppb <br /> CAS <br /> Percent <br /> Recovery <br /> True Percent Acceptance <br /> Analyte Value Result Recovery Limits <br /> Benzene 25 23.2 93 85-115 <br /> Tolucuc 25 23.3 93 85-115 <br /> Etlivlbenzcne 25 23.2 93 85-115 <br /> Xylenes. Total 75 73.0 97 85-115 <br /> Gasoline 250 242 97 90-110 <br /> [(_V25AU060194 <br /> Page 7 <br />