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s >yfi a <br /> Eli 15 <br /> NO <br /> Fa z w <br /> Evaluation of Contamination January 3, 1989 <br /> Former Texaco Service: Station, Manteca, California Acta 38053-1 <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> i <br /> The results of our field investigation and laboratory analyses of <br /> soil and water samples support the following conclusions; <br /> o Concentrations of TPH as gasoline and BTEX in soil <br /> samples collected above the ground-water surface were <br /> below the detection limits of the methods used with the <br /> exception of the soil samples analyzed from boring B-1, <br /> which showed relatively low levels (23 to 29 Qpm) TPH <br /> as gasoline. <br /> o No organic lead was detected in the sail sample <br /> analyzed from adjacent to the former tank cavity. <br /> i <br /> o The concentrations of TPH as gasoline and BETX in <br /> ground-water samples indicate that ground-water J <br /> contamination has occurred. Contaminant concentrations <br /> in the ground-water samples collected from wells NW-2 <br /> and Mw-3 are in excess of the action levels recommended <br /> for drinking water by the California Department of <br /> Health services. <br /> �pc�/,��;d GeoSy�tems J <br />