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liggi <br /> r <br /> March 9, 1988 AGS 038009-1 <br /> Fire Engine Company No. 2, Stockton, California <br /> w. <br /> 10) Preparation of a Problem Assessment Report summarizing our <br /> findings, conclusions, and recommendations. <br /> The first proposed well, MW-1, will be located immediately <br /> adjacent to the fuel tank cavity to allow evaluation of <br /> contaminant levels below the suspected source of contamination. <br /> The second well, MW-2, will be constructed approximately 75 feet <br /> east--southeast of the former tank cavity. Well MW-3 will be <br /> drilled approximately 70 feet south of the tank cavity. Wells <br /> MW--2 and MW-3 will be used to help evaluate the lateral extent of <br /> the contamination in the subsurface in the inferred downgradient <br /> direction from the former tank. <br /> SOIL BORING/SAMPLING <br /> ,.J <br /> The soil borings will be drilled using 8- to 10-inch-diameter, <br /> continuous flight, hollow stem augers and a Mobile B-61, or <br /> similar, drill rig. Auger flights will be steam cleaned prior to <br /> use to minimize the possibility of downhole- or cross- <br /> contamination. The drilling will be performed under the guidance <br /> of a field geologist and the earth materials in the boring will <br /> be logged as drilled. <br /> Aima/ied Geosystoms <br />