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�y <br /> August 8, 1988 AGS Job No. 38053-1 <br /> Former Texaco Service Station, Manteca, California <br /> 1'E <br /> a Analyze selected soil and ground-water samples for <br /> hydrocarbon product constituents in a laboratory <br /> certified by the State of California. <br /> o Evaluate the local ground-water gradient by surveying <br /> the top of each well casing, measuring depths to ground <br /> water, and calculating the relative elevation of the <br /> ground-water surface. <br /> o Interpret field and laboratory data to evaluate the <br /> extent of hydrocarbon contamination. <br /> o Perform additional tasks including installation of <br /> additional onsite and offsite wells, if necessary, to <br /> delineate the extent of subsurface contamination. <br /> Tests will be conducted to evaluate potential remedial t, <br /> actions. This work will be discussed with the client ' <br /> before proceeding. <br /> o Prepare a report describing the subsurface conditions <br /> at the site as revealed in the borings and wells, <br /> !:2 discussing the local geology, hydrogeology and ground- <br /> water usage and summarizing our findings, conclusions, <br /> and recommendations for mitigation. <br /> The irst monitorin_ well wil e located a ' ent to the <br /> ' origin tank cavi to evaluate coh aminant levell�- ow the <br /> suspected ource of co amination. The second monitoring well <br /> will be located in the northwest corner of the site, in the <br /> inferred direction of ground-water flow to delineate the <br /> horizontal extent of ground-water contamination. The third <br /> monitoring well will be located along the northeastern margin of <br /> ` the property to evaluate the lateral extent of contamination and <br /> assess if contamination has migrated offsite. The locations of <br /> the proposed monitoring wells are depicted on the Generalized <br /> Site Plan. <br /> 8 <br /> `� Aivhlied GLOSS) A9117S <br />