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NEI/GTEL Client ID BLAOICHV08 QUALITY CONTROL RESULTS <br /> Logen Number W7040077 Volatile Organics <br /> Method. EPA 8020A <br /> "roject ID (number). 970401-F1 <br /> � ro ect ID (name) CHEVRON/9-4275/2905 W BENJAMIN HOLT DR/STOCKTON/CA Matrix A ueous <br /> Matrix Spike(MS) Results <br /> GTEL Sample ID W7040078-01 MS ID MS04007801 <br /> -Analysis Date 08-APR-97 08-APR-97 <br /> Units ug/L Sample Spike MS MS Acceptability Limits <br /> Analyte_ Conc Added Conc % Rec bRec <br /> Benzene < 0 5 (0 000) 20 0 19 6 98 0 67-110 <br /> Toluene < 0 5 (0 000) 20 0 18 5 92 5 68-115 <br /> £thylbenzene < 0,5 (0 000) 20 0 17 5 87.5 65-120 <br /> Xylenes (Total) < 0 5 (0 000) 60 0 60 4 101 62-119 <br /> Notes <br /> values in parentheses in the sample concentration column are used for % recovery calculations <br /> NEI/GTEL Wichita, KS <br /> W7040077 6 <br />