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had occurred in the vicinity of the former gasoline tank, and that further investigation was <br /> warranted <br /> 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 To date the lateral and vertical <br /> extent of ground water contamination have not been defined <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 The maximum <br /> depth of boring was 18 feet below grade <br /> Dark brown silty clay dominates the stratigraphy from within one foot of the surface to <br /> the bottom of the borings In general, fine sand was found within the silty clay unit near <br /> the bottom of the borings The moisture content increased with depth and reached <br /> saturation between 12 and 16 feet below surface grade (bsg) <br /> 1.4 Hydrology <br /> Groundwater at the site is contained in a semi-confined or unconfined aquifer 10 to 15 <br /> feet bsg Historically, groundwater at the site demonstrates a shallow gradient which <br /> slopes to the northwest <br /> t <br /> 2.0 PURPOSE <br /> The purpose of this report is to present analytical data collected during the December 21, <br /> 1995 quarterly sampling event Sample collection methodology, laboratory analytical <br /> methods, analytical data and an evaluation of the data are described in subsequent <br /> ' sections of this report <br /> 3.0 SCOPE OF WORK <br /> ' The following tasks were conducted in order to meet the objectives of this phase of the <br /> investigation at this site <br /> . American Geological Services, Inc <br /> ' CA95 DE-029 <br /> 3 <br />