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On August 24 and 25, 1994, Remcor installed an additional seven soil borings and three <br /> ' monitoring wells to further define the lateral extent of soil and ground water <br /> contamination identified in the initial phase of work <br /> ' American Geological Services Inc installed three additional monitoring wells on March <br /> g g <br /> 8, 1996 Two wells were installed to further define the lateral extent of soil and ground <br /> water contamination, and one well was installed in the down gradient direction to <br /> determine the vertical extent of the ground water plume <br /> 1.3 Geology <br /> ' The subsurface geology of the site was determined by logging soil samples collected at <br /> various intervals during the initial and supplemental site investigations performed by <br /> Remcor, and American Geological Services The maximum depth of boring was 45 feet <br /> ' below grade <br /> Remcor reported that dark brown silty clay dominates the stratigraphy from within one <br /> foot of the surface to the bottom of their borings installed to 18 feet below grade In <br /> general, fine sand was found within the silty clay unit near the bottom of the borings <br /> During the installation of the additional three monitoring wells, AGS encountered silty <br /> fine sands to a depth of approximately 20 feet A fine to medium sand layer was found <br /> between 20 and 25 feet in MW-8, and between 25 and 35 feet, and 40 and 45 feet in MW- <br /> 9 Soil boring logs are presented in Appendix A for the three newly installed monitoring <br /> wells <br /> ' 2.0 OBJECTIVES AND SCOPE OF WORK <br /> 2.1 Objectives <br /> The objectives of this phase of the investigation were to determine the lateral and vertical <br /> extent of ground water contamination caused by a release of gasoline from the former <br /> UST or its associated piping This work was conducted in accordance with Section <br /> 2772(a) of the California Underground Storage Tank Regulations (Title 23, Division 3, <br /> Chapter 16 California Code of Regulations) In order to accomplish the above-stated <br /> objective,the following scope of work was conducted <br /> American Geological Services, Inc <br /> a CA95DE-029 <br /> 4 <br />