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August 5, 1988 AGS Job No. 38033-1 <br /> Marlowe Properties, Stockton, California <br /> 1 <br /> FIELD WORK AND METHODS <br /> 1 Applied GeoSystems observed the drilling of two soil borings and <br /> installation of one monitoring well at the site to assess the <br /> presence of subsurface hydrocarbon contamination and obtain a <br /> preliminary definition of the vertical and horizontal extent of <br /> soil and ground-water contamination. <br /> A geologist from Applied GeoSystems was present at the site on <br /> July 7 , 1988, to observe drilling and well construction, collect <br /> soil samples, and evaluate drill cuttings subjectively for <br /> tie <br /> evidence of contamination. The borings were drilled by Datum <br /> Exploration of Pittsburg, California, with a CME-75 drill rig <br /> equipped with 8-inch-diameter, continuous-flight, hollow-stem <br /> 4 augers. The augers were steam-cleaned prior to use in each boring <br /> to minimize the possibility of downhole or crosshole <br /> contamination. <br /> Soil boring B-1 was drilled to a total depth of 34 feet. Soil <br /> boring B-2 was drilled to a total depth of 80.5 feet. Ground <br />' water was encountered at approximately 65 feet below existing <br /> grade in boring B-2 , which was lower than anticipated. <br /> 6 <br /> .4pp/149d GeoSystems <br />