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TABLE 2-3 <br /> SUMMARY OF FREQUENCY OF DETECTION OF [GROUNDWATER DATA' <br /> CALTRANS SHOP 10 <br /> STOCKTON, CALIFORNIA <br /> Analyte Number of Samples Number of Detects Frequency {%) <br /> TPH-g 153 66 431 <br /> TPH-d 127 24 189 <br /> Benzene 153 78 510 <br /> Ethylbenzene 153 63 412 <br /> Toluene 153 83 542 <br /> Xylene 153 80 523 <br /> MTBE by EPA 8020 110 18 164 <br /> MTBE by EPA 8260 12 0 00 <br /> ' Groundwater data from 1987 through August 9998 <br /> Pagel tab2-3218/99 <br />