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GTEL Client ID BLAO1CHV08 QUALITY CONTROL RESULTS <br /> ogin Number W6050238 Volatile Organics <br /> o3ect ID (number) 960510 U1 Method EPA 8020 <br /> Project ID (name) CHEVRON/9 1848/1257 YOSEMITE WEST/MANTECA/CA Matrix Aqueous <br /> Cal)bratlon Verification Sample Summary <br /> Spike Check Samp e QC percent Acceptability Limits <br /> Analyte Amount Concentration Recovery Recovery <br /> EPA 8020 Units ug/L QC Batch 052096GC10 5 <br /> Benzene 20 0 19 6 98 0 77-123% <br /> Toluene 20 0 21 3 107 77 5-122 5% <br /> Ethylbenzene 20 0 21 3 107 63-137% <br /> Xylenes (Total ) 60 0 65 8 110 85-115% <br /> TPH as Gasoline 500 550 110 80-120% <br /> Notes <br /> QC check source Supelco #LA12389 <br /> GTEL Wichita KS <br /> W6050238 4 <br />