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GTEL Client ID: GMX02CHVIS QUALITY CONTROL RESULTS <br /> Login Number: W6030312 Volatile Organics <br /> o3ect ID (number): C3077 Method: EPA 8020 <br /> ro 'ect ID (name): CHEVRON REAL ESTATE MANAGEMENT/FRESNO/CA Matrix: Aqueous <br /> Calibration Verification Sample Summary <br /> Spike Check Sample CC Percent Acceptability Limits <br /> ' Analyte Amount Concentration Recovery Recovery <br /> EPA 8020 Units:ug/L QC Batch:032296GC5.1 <br /> 1 Benzene 20.0 17.0 85.0 77-123% <br /> Toluene 20.0 18.0 90.0 77.5-122.5% <br /> Ethyl:benzene '20:0 17.8 89.0 63-137% <br /> Xylenes (Total) 60.0 52.2 87.0 85-115% <br /> 1 TPH as Gasoline 500. . 482. 96.4 80-120% <br /> Notes: <br /> 1 QC check source: Supelco #LA12389 <br /> I <br /> I <br /> i <br /> 1 <br /> 1 <br />•i <br /> iGTEL Wichita, KS <br /> W6030312:4 <br /> 1 <br />