2010-02-01_REPORT - M1983194 (2)

Home Browse Search

4.3 2009 Operation Results Mining and production activities were continuous in 2009. The following table provides a summary of mining and process results: Table 4.1- Mine and Process Data 2009 Month Avg. GPM Recovery Temp. Plant Assay Bicarb g/l Assay NaCl 1 Tons Cavity #5H Tons Cavity #6H Tons Cavity #71-1 Tons Tons Monthly Cavit Cavity y Total #10H #11H Tons Jan-09 907 178 171 52 6,565 1,580 138 8283 Feb-09 946 177 170 51 5,909 1,733 136 7778 Mar-09 880 177 169 50 5,358 1,722 133 7214 Apr-09 975 177 168 49 6,045 1,788 141 7973 May-09 938 178 167 49 5,652 1,669 132 7454 Jun-09 850 176 169 46 5,605 1,657 133 7394 Jul-09 962 177 169 46 5,961 1,765 125 7851 Aug-09 1006 173 170 46 6,337 1,873 134 8344 Sep-09 892 179 172 44 3,155 935 100 3,129 7319 Oct-09 1007 181 174 41 4,239 4,906 9145 Nov-09 866 190 200 42 458 8,925 9383 Dec-09 880 182 188 41 525 6,316 2,286 9128 AVG 926 179 174 46 5621 1636 533 5819 2286 8105 TOTAL 50587 14722 6393 23276 2286 97266 Key to above headings: a Ave. GPM - monthly average injection flow rate during process operations. Temp. - Temperature in degrees F recovered at the pregnant liquor tank. Assay - g/1 sodium chloride or sodium bicarbonate in the composite recovery liquor as total bicarbonate. (Total bicarbonate = bicarbonate g/1 + 1.58 x carbonate gll). Tons - total monthly bicarbonate production without adjustments per cavity. Figure 4-2 illustrates the 2009 pregnant liquor results and Figure 4-3 represents monthly production for 2009. Production and processing were performed for twelve months of the year. Good brine grade and temperatures were noted throughout the year. The balance between injection and recovery rates for cavities IA, 5H, and 6H has been continuously monitored using fluid level indicators (pressure transmitters) installed in existing Dissolution Surface aquifer monitoring wells located near the active cavities. 2009 Annual Report 6 of 33