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NEI/GTEL Client ID BLAO1CHV0B QUALITY CONTROL RESULTS <br /> gin Number W7040077 Volatile Organics <br /> Sect ID (number) 970401-E1 Method EPA 8020A <br /> Project ID (name) CHEVRON/9 4275/2905 W BENJAMIN HOLT DR/STOCKTON/CA Matrix Aqueous <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 %Rec <br /> Benzene < 0 5 (0 000) 20 0 19 6 9810 67-110 <br /> Toluene < 0 5 (0 000) 20 0 18 5 92 5 68-115 <br /> Ethylbenzene < 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 colimn are used for % recovery calculations <br /> NEI/GTEL Wichita KS <br /> W7040077 6 <br />