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a <br />y5W°AIiIRr <br />Solici t�tAi a9f, pp lc'able or Relevant <br />and Appropriate Requirements (ARARs) <br />for Groundwater Remediation <br />1. Purpose: ARARs are being solicited to assure that all local, state, and <br />FederaT—lasews and other requirements are considered when final remedial <br />actions (clean-up methods) -are selected to address groundwater contamination <br />at the Sharpe Site. A separate solicitation to address soils contamination <br />will be submitted at a later date. <br />2. Site Background: The Department of Defense has owned and operated the <br />Sharpe Site since the early 1940°s.. Use and disposal of solvents, primarily <br />trichloroethene, has resulted in contamination of soil and groundwater on and <br />near the installation. The Sharpe Site was placed on the National Priorities <br />List in July 1987. The most severe problem, groundwater contamination, <br />occurs in the north, south, and central areas of the installation. <br />Trichloroethene contamination of groundwater reaches levels as high as 12,000 <br />parts per billion. If left untreated, groundwater contamination from the <br />site may migrate to and contaminate agricultural and drinking water supplies. <br />Two treatment plants, one in the northern area and one in the southern area <br />are currently in operation. A third treatment plant, designed to, clean up <br />groundwater contamination in the central area of the installation, is <br />planned. <br />3. Goals for Groundwater Remedial Actions: Groundwater remedial actions at <br />the Sgarpe Site are intended to accomp77s the following: <br />a. Preclude the continued migration of contaminated groundwater towards <br />potable and agricultural supply wells. <br />b. Reduce contamination levels to or below applicable clean up levels. <br />c. Provide for an acceptable method of disposal% or reuse of treated <br />water. <br />4. Site Location: The Sharpe Site is located in Lathrop, California in the <br />San Joaquin Va ey. A location map is attached. <br />5. Remedial Action Alternatives: The following methods for treating the <br />contaminated groundwater are either already being used or -are under <br />consideration. <br />:J <br />