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JAN 91980 42 PAGE 5'2. <br />Geraghty & Miller, Inc. <br />-3- 7 January 1980 <br />within a minimum five miles of the prospective well field. <br />In addition, Geraghty & Miller will attempt to locate one <br />or more existing wells that might be suitable for use as <br />observation wells during a pumping test. Such wells would <br />require that only one production well be drilled. <br />Two separate water management districts (South Florida Water <br />Management District and St. Johns River Water Management <br />District) and two separate sub -district offices (Fort Pierce <br />and Orlando) of the Florida Department of Environmental <br />Regulation (DER) maintain jurisdiction over water use and well <br />construction within five miles of the taxing district. These <br />agencies will be contacted for information. In addition, data <br />may be available from the Florida Department of Natural <br />Resources, the U. S. Geological Survey, local well drillers, <br />and local engineers. Once located, water samples will be <br />collected from existing wells in the Floridan Aquifer, if <br />possible. These water samples will be analyzed for chloride <br />concentration and specific conductance. The complete inventory <br />will be included in the testing program report to <br />Indian River County that will serve as technical documentation <br />should any future problems develop. The estimated cost of <br />consulting services for Task 2 is $3,700. <br />Following the selection of a drilling contractor by competitive <br />bid, a production well will be installed at a suitable location <br />in the taxing district. Because of concern for the potential <br />threat of upward movement of poor quality water from deeper <br />portions of the aquifer, the drilled hole at the production <br />well will be extended to a depth of approximately 900 feet below <br />land surface. A monitoring tube extending to land surface will <br />be installed at that depth, and the annular space will be <br />sealed between that depth and about 700 feet. The well will <br />produce water from an open borehole occuring between about 400 <br />and 700 feet below land surface. <br />During the well inventory (Task 2), an attempt will be made <br />to locate one or more existing wells in the vicinity of the <br />production -well site to serve as observation wells during the <br />pumping test. However, if a suitable well cannot be found, an <br />observation well may have to be installed during the drilling <br />program. The county will be notified if this is required and <br />