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well field, immediately adjacent to where the first few mining <br />cavities will be established (Figure 2). The NaTec-26-EX-2 set <br />of wells will serve as long-term, in-field (well field and <br />dedicated) monitoring wells. A total of nine Dissolution <br />Surface and four B-Groove monitoring wells will be completed <br />from production wells in the first five-year block. An <br />additional Dissolution Surface well will be completed between <br />the first and :second caverns. (May also be utilized as <br />subsidence montor:ing well.) <br />After initial cavities (years 1-5) have been mined out, an <br />additional well pair (Dissolution Surface and B-Groove) will be <br />recompleted immediately down-gradient from the next five-year <br />• block (years 5-10) of cavities to be mined. These wells will be <br />utilized to monitor ground water long-term at this location <br />until the next group of cavities (years 10-15) are mined-out. <br />Then, as before, two additional wells will, again, be <br />recompleted immediately down-gradient from the next five-year <br />block of cavities, and so on. Only the Dissolution and B-Groove <br />Zones are planned for monitoring as they should indicate effects <br />of mining. The five-year blocks of cavities assumes 125,000 TPY <br />production. <br />At this time, each subsequent five-year mine block will have at <br />least seven Dissolution Surface monitoring wells and at least <br />three B-Groove monitoring wells, at least one Dissolution <br />Surface monitoring well will be located between adjacent mine <br />9 I <br />