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t ' <br /> Mr. Jim Thompson -2- 20 May 1987 <br /> i <br /> i <br /> J <br /> I' <br /> until you have defined the ground water and soil plumes . As new MWs are <br /> installed, a better definition ofi� the situation will be developed and placement of <br /> extraction wells should be more accurate. <br /> In summary, you are to: (1) install as many boreholes as necessary to define the <br /> extent and degree of soil contamination; (2) install as many monitor wells as <br /> necessary to define the extent of the ground water contamination plume; and (3) <br /> close down the recovery well until 1 and 2 are complete. <br /> If you have any questions, pl eased contact me a (916) 361-5731. <br /> GAR S. JOHNSON <br /> Engineering Geologist <br /> GSJ:cab <br /> �4 <br /> cc: Ms . Laurie Cotulla, San Joaquin Local Hea th District, Stockton <br /> I, i <br /> �k <br /> I I <br /> I� 1 <br /> C <br /> �+ I <br /> it I <br /> I <br /> 4 : <br /> I� <br /> y <br /> fit!! <br /> d <br /> I <br /> i� <br />