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GTEL Client ID BLA01CHV08 QUALITY CONTROL RESULTS <br /> Login Number- C5010312 Volatile Organics <br /> Project ID (number) 950123-G1 Method EPA 8020 <br /> Project ID (name)- _ Chevron/#9-1918/45 East Harding-Way, Stockton. CA - - Matrix _ _Aqueous <br /> Matrix Spike and Matrix Spike Duplicate Results <br /> Matrix Matrix Matrix Spike Matrix Spike <br /> Original Spike Spike Spike Duplicate Duplicate Acceptability Limits <br /> Analyte Concentration Amount Concentration Recovery X Concentration Recovery X RPD X RPD X Recovery X <br /> EPA 8020 GTEL Sample ID C5010246-03 Spike ID.Q012795-1 Dup ID Q012795-2 <br /> Units _ ug/L Analysis Date 22-JAN-95 27-JAN-95 28-JAN-95 Client ID Batch QC <br /> Benzene < 0.50 20 d 23.2 115. 22 4 112. 3.5 34 57.3-138% <br /> Toluene < 0 50 20 0 22 9 115 22 0 110 4 4 31 63-134% <br /> Ethylbenzene a 0.50 20 0 21.5 108. 20.5 103. 4.7 38 59 3-137% <br /> Xylenes (Total) < 0 50 60 0 64 6 108 61 7 103 4 7 31 59 3-144% <br /> Notes <br /> I • <br /> GTEL Concord, CA NGTEL <br /> R <br /> C5010312 2 LABORATORIES INC. <br />