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Figure 2 -2 <br />Natural Soda Sodium Leases <br />pp <br />n , O <br /> <br />Vr,d U& I" <br />> Y M i ni <br />lrs MrlM.?Y ? + <br />lL? <br />22 Leasehold Statues <br />The original four sodium leases were rencwcd by the BI-M, ,IUIv 1, 2001 for a period of tcn years. <br />Annual rental and minimum royalty payments were submitted to the Mineral Management Service. <br />3.0 Project Status <br />3.1 2007 Project Activities <br />NSI produced 99,065 tons of sodium bicarbonate in 2007 using cavities 1 A, 511. and 6H. Process <br />changes were made throughout the year, which increased tonnage. There were no significant <br />production outages experienced during 2007. Routine "boil outs" were perforned approximately <br />quarterly throughout the year. Various short shut-downs were required for equipment repair <br />and/or replacement. The following information summarizes items of significance that occurred in <br />2007, a summary of the tons mined from each cavity in 2007, a summary of tons produced by <br />month and a review of regulatory related activities. <br />3.1.2 items of Significance <br />• Flow was reversed between wells 51-1 and 6H. 5I-1 is now the injection well and 6H the <br />production well. <br />• Well 511-IV was completed to allow production kom the middle of the 5H cavity. This <br />increase in product, along with the flow reversal has allowed IA to be retired from active <br />use.