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Subsurface Environmental Investigation September 21, 1988 <br /> Abandoned Lerner Service Station, Lodi, California AGS 38055-1 <br /> being used are unknown to Applied GeoSystems. The locations of <br /> underground utilities known to Applied GeoSystems are shown on <br /> 0" Plate P-2. <br /> FIELD WORK AND METHODS <br /> Soil Borings <br /> Applied GeoSystems observed drilling of.four 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 /> August 18 and 19. 1988, to observe drilling and well <br /> construction, collect soil samples, and evaluate drill cuttings <br /> f..� subjectively for evidence of contamination. The soil borings <br /> were drilled by Trace Environmental Services, Inc. , of Rancho <br /> Cordova, Cal;'-fornia, with a Mobile B-61 drill rig equipped with <br /> t_ <br /> i� 8-inch-diameter, continuous-flight, hollow-stem augers. The <br /> augers were steam-cleaned prior to use in each boring to minimize <br /> the-possibility of-downhole-of-crosshole-contamination - <br /> y„r <br /> 5 <br /> A)OR11440r! CCevsySMOMs <br /> r� <br />