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t <br /> Subsurface Environmental Investigation September 21, 2988 <br /> Abandoned Lerner Service Station, Lodi, California AGS 38055-1 <br /> RECOMMENDATIONS <br /> Applied GeoSystems recommends that additional subsurface work be <br /> conducted at the site. This work should include delineation of <br /> the horizontal extent of soil and ground-water contamination. <br /> Additional monitoring wells should be installed in the inferred <br /> downgradient and lateral directions of ground-water flow. This <br /> additional work would allow the gradient to be calculated to <br /> 46 evaluate the present ground-water flow direction and allow, an <br /> indication of the extent of soil and ground-water contamination. <br /> Sampling methodology .and monitoring well construction should <br /> fallow protocols outlined in this report and presented in our <br /> Work Plan {Report `.do. 38055-1, dated August 3, 1988) for the <br /> site. Monitoring wells located south of the tank cavity will be <br /> y within 50 feet of a sanitary sewer main. Monitoring wells in <br /> F <br /> that area, inferred to be downgradient from the tank cavity, will <br /> require a varianc-. from. the San Joaquin Local Health district. <br /> A <br /> ter <br /> LIMITATIONS <br /> 1 This report was prepared in accordance with generally accepted <br /> standards; of environmental geological, practice in California at <br /> the time this -Investigation was performed. This investigation <br /> was conducted solely for the purpose of evaluating environmental <br /> 12 <br />