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Table 4 <br /> Historical Groundwater Sample TPH-G and BTEX Analytical Results <br /> The Earthgrains Company <br /> Stockton, California <br /> Concentration {ug/1} <br /> Well Date �—TP­H-G Benzene Toluene Ethylbenzene Total Xylenes <br /> ND Not detected at or above laboratory detection limit shown in parentheses <br /> TPH-G Total petroleum hydrocarbons as gasoline <br /> ug/I Micrograms per liter <br /> " Laboratory reports not typical of gasoline <br /> * BTEX results for these samples reported using EPA Method 82608 <br /> * TPH-G results reported using Method 802018015, but, these samples <br /> were analyzed outside of recommended 14 day hold time <br /> Note November 15, 1994 samples collected from piezometers PZ-1 and PZ-2 followed a 2-week <br /> Isoil vent and air sparge pilot test performed in this area <br /> t <br /> r <br /> t <br /> env/62400132/121382eg/stockton/histlab <br />