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NEI/GTEL Client ID BLAO1CHV08 QUALITY CONTROL RESULTS <br /> Login Number W7100039 Volatile Organics <br /> ro�ect ID (number) 970929 M1 Method EPA 9O2OA <br /> ro ect ID (name) CHEVRON/9-4275/2905 W BENJAMIN HOLT DR/STOCKTON/CA Matrix• A ueo�s <br /> Matrix Spike(MS) Results <br /> GTEL Sample ID W7100038-07 MS ID MS100O3807 <br /> Analysis Date 05-OCT-97 05-OCT-97 <br /> Units ug/L Sample Spike MS MS Acceptability Limits <br /> Analyte Conc_ Added _ Conc _% Rec %Rec <br /> Benzene < 0 5 (4,004) 20 0 20 5 103 67-110 <br /> Toluene < 0 5 (0 000) 20 0 19 9 99 5 68-115 <br /> Ethylbenzene < 0 5 (0 000) 20 0 22 2 111 65-120 <br /> Xylenes (Total) < 0 5 (0 000) 60 0 63 6 106 62-119 <br /> Notes <br /> Values in parentheses in the Sample concentration column are used for % recovery calculations <br /> NEI/GTEL Wichita KS <br /> W7100038 6 <br />