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DEC. -1-9.1979 BOK= .+G` PAGE 376 I. R. County Comm. - 3 - 12 Dec 79 located, water samples will be collected from existing wells in the Floridan Aquifer, if possible. These water samples will be analyzed for chloride concentration and specific conduc- tance. The completed inventory will be included in a report to Indian River County that will serve as technical documenta- tion should any future problems develop. Task 3 -- Drilling and Testing Program Following the selection of a drilling contractor by competitive bid, a 16 -inch -diameter test well and a 12 -inch -diameter obser- vation well will be installed at a suitable location in the taxing district. Both of these wells will be designed to serve as production wells in the future. Because of concern for the potential threat of upward movement of poor quality water from deeper portions of the aquifer, the drilled hole at the test - production well will be extended to a depth of approximately 900 feet below land surface. A monitoring tube extending to land surface will be installed at that depth, and the borehole will be sealed between that depth and about 700 feet. The well will produce water from an open borehole occurring between 400 and 700 feet below land surface. Approximately 1000 to 2000 feet from the test -production well, the observation -produc- tion well will be installed. This well will be.drilled to about 700 feet and completed with an open borehole between 400 and 700 feet. During the construction and testing of wells, a Geraghty & Miller, Inc., hydrogeologist will act as resident inspector at the site. In addition to determining that the well's are constructed according to specifications, the hydrogeologist will describe and analyze formation samples collected during drilling and perform field analyses on water samples collected as drilling progresses in the Floridan'Aquifer. Borehole geo- physical logging will be performed during the drilling operation. Previous investigators have speculated on the existence of a secondary artesian aquifer in eastern Indian River County. This zone, occurring below the shallow aquifer and above the Floridan Aquifer in western portions of the county and outside the county, has not been reported to the east. Its existence could provide an important future water source in the county. Therefore, before casing is installed in the test -production and observation -production wells, electric and gamma -ray logging