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4.3.1 2003 Operation Results
<br />Mining and production activities were continuous in 2003.
<br />A summary of mining and process results follows:
<br />2003 Avg. GPM Recovery Assay Assay Tons Tons Tons Tons Tons Monthty
<br />Month (on stream) Temp. Bicarb g/l NaCI g/I Cavty 1A Cav'dy 3A Cavty 4A Cavity 5H Cavity 6H Total Tons
<br />Jan-03 733 201 255 17 1,777 0 0 3,525 3,160 8,460
<br />Feb-03 370 193 238 17 1,402 0 0 788 1,193 3,383
<br />Mar-03 666 198 239 17 1,807 0 0 2,980 ~ 2,941 7,728
<br />Apr-03 662 192 231 16 1,498 0 0 2,534 2,458 6,491
<br />May-03 578 188 224 16 1,340 0 0 2,375 2,242 5,957
<br />Jun-03 722 183 209 15 1,511 0 0 2,751 2,575 6,837
<br />Jul-03 S44 177 195 15 1,066 0 0 2,123 1,895 5,292
<br />Aug-03 647 181 201 i6 1,242 0 0 2,907 2,387 6,532
<br />Sep-03 756 185 203 16 1,194 0 0 2,698 2,260 6,152
<br />Oct-03 721 186 203 16 1,532 0 0 3,114 2,762 7,408
<br />Nov-03 802 186 205 16 1,791 0 0 3,175 3,119 8,085
<br />Dec-03 500 186 211 16 1,240 D 0 1,921 2,025 5,187
<br />AVERAGE 634 167 214 i6
<br />TOTAL - 17,444 0 0 30,976 29,093 77,513
<br />Key to above headings:
<br />Ave. GPM - monthly average injection flow rate during process operations.
<br />Temp. -temperature in degrees F recovered at the pregnant liquor tank
<br />Assay - g/I sodium chloride or sodium bicarbonate in the composited recovery liquor as total bicarbonate. (total
<br />bicarbonate =bicarbonate g/I + 1.58 x carbonate g/f).
<br />• Tons - total monthly bicarbonate production without adjustments per Cavity.
<br />Figure 4-2 illustrates the 2003 pregnant liquor results and Figure 4-3 represents monthly
<br />production for 2003 as shown in operations results (Section 4.3.1). Production and
<br />processing were performed for twelve months of the year. The production was shared
<br />between cavities #1 A, 5H, and 6H for the year of 2003.
<br />The balance between injection and recovery rates for cavities #1A, 5H, and 6H had been
<br />continuously monitored using fluid level indicators (pressure transmitters) installed in
<br />existing Dissolution Surface aquifer monitoring wells located near the active cavities.
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