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Well 90-5 was plugged and abandoned in 2000. This well was the horizontal injection well <br />for the original cavity 1. <br />_~ <br />,•, <br />~`,`C `1~ \ , ~,' \,~ <br />Other activities in year 2000 were: <br />a) Anew air dryer was purchased. <br />b) 2200 feet of 8" line pipe (from the plant to drilling trailer), used for injection, was <br />replaced due to severe corrosion. <br />c) New valves were installed in the plant for testing. These new style valves will <br />eventually increase the efficiency of the plant by decreasing failures and <br />crossflow between the barren and pregnant liquor flows. <br />d) Anew wash water sump pump was purchased to help eliminate solids being <br />transported to the process pond. <br />e) During 2000, White River Nahcolite produced quality brine low in chloride. <br />f) Anew barren heat exchanger was installed. <br />g) Three rotary feeders were installed on discharge from silos and screw conveyors <br />were installed to replace paddle conveyor and air activated valves. Capacity <br />was increased from 15 to 60 tph from the silos to the bucket elevator. <br />h) Several projects were completed to minimize water usage in the plant. Among <br />these were the use of double RO seals and a piping system to return pump <br />gland water to the process tank rather than allow it to enter the brine water <br />system. Barren water lines, to encourage the use of hot barren liquor rather than <br />wash water, were installed. <br /> <br />5 <br />