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• As shown in operation results (Section 4.3.1) production and processing was performed <br />for 12 months of the year. The production was switched from cavity #3 to cavity #1 when <br />the chloride contamination increased, and cavity #3 plugged off. No sign of chloride <br />contamination has been observed coming from cavity #4. During the startup of cavity #1, <br />high levels of chloride were in the returning liquor. To minimize the contamination to the <br />production system, the initial (three days) flow was directed to the waste pond. By the <br />end of 1995, the g/I of sodium chloride being recovered from cavity #1 had decreased to <br />65, from an initial high of approximately 210 g/I. <br />Cavity #3 was the sole provider of product to the plant at the beginning of 1995. Due to <br />the high chloride contamination and continual plugging problems cavity #3 was shut in <br />• September of 1995. <br />Cavity #4 came on line in May of 1995 utilizing a submersible pump to recover injected <br />liquor. Used for the first time on the White River Nahcolite Minerals lease, the <br />submersible pump was necessary to recover liquor from a fractured ore body. Initially set <br />to recover 300 gpm, the pump was later upsized to recover a maximum of 500 gpm. <br />Also in May, cavity #3 failed and the recovery of liquor was not possible. Using the same <br />pump design as utilized on cavity #4, a similar pump was installed in cavity #3. When <br />this cavity was shut down in September of 1995, the equipment was transferred to cavity <br />#1. <br />• 19 <br />