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NEI/GTEL Client ID: EMC05CHV13 QUALITY CONTROL RESULTS <br /> Login Number: W7050440 Volatile Organics <br /> Project ID (number): 22560-203.002 Method: EPA 8020A <br /> Project ID (name): CHEVRON PIPELINE/MT VIEW TOWNNHOMES/TRACY/CA Matrix: Aqueous <br /> Matrix Spike(MS) Results <br /> GTEL Sample ID:W7050446-04 MS ID:MS05044604 <br /> Analysis Date: 04-JUN-97 04-JUN-97 <br /> Units: ug/L Sample Spike MS MS Acceptability Limits <br /> Analyte Conc. Added Conc. % Rec. %Rec. <br /> Benzene < 0.5 (0.360) 20,0 21.8 107. 67-110 <br /> Toluene < 0.5 (0.180) 20.0 20.5 102. 68-115 <br /> Ethylbenzene < 0.5 (0.0001 20.0 17.4 87.0 66-'1.20 <br /> Xylenes (Total) < 0.5 (0.250) 60.0 62.0 103. 62-119 <br /> Notes: <br /> Values in parentheses in the sample concentration column are used for % recovery calculations. <br /> NEI/GTEL Wichita. KS <br /> W7050440:6 <br />