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11 f <br /> collected from four of the ten soil borings Significant concentrations of MTBE were <br /> detected in soil samples collected from a boring advanced near the former tank pit <br /> - 23 May 2000 three ground water monitoring wells (MW-1 through MW-3) were installed, <br /> 02 October 2000, one ground water monitoring well (MW-4) was installed, and <br /> On 22 January 2002, an 8-hour step draw-down ground water extraction test, and 04 and 05 <br /> February 2002, a 36-hour constant rate ground water extraction feasibility test were <br /> performed at the site to determine the feasibility of ground water extraction as a remediation <br /> alternative for the site <br /> Quarterly ground water sampling and reporting has been ongoing since June 2000 <br /> The soil boring data indicates that silt underlies the site to a depth of approximately 15 feet below <br /> surface grade (bsg) and in turn is underlain by a silty sand at depths between 15 and 20 feet bsg <br /> Current ground water monitoring data at the site indicates that ground water occurs at a depth of <br /> approximately 8 feet bsg,historically, ground water flow direction has been toward the northeast <br /> The approximate lateral extent of impacted soil and ground water has been defined by the installation <br /> of soil borings and the current monitoring well network The vertical extent of dissolved <br /> hydrocarbons in the former UST area may require additional assessment <br /> i <br />