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L .i! ~ ... <br /> <br /> <br />C~ <br />4.3.1 2001 Oaeration Results <br />Mining and production activities were continuous in 2001. <br />A Summary of mining and process results follows: <br />2001 Avg. GPM Recasy Assay Assay Tons Tons Tons <br />Month (on stream) Temp. Plant Bicab gA NaCI yl Cavity 7A Cadty 3A Cavily 4A Monthty <br />Total Tons <br />Feb-0t 77~ tso <br />Mar-01 815 162 <br />Apr-01 ne tso <br />May-01 ns tsi ~ <br />Jun-01 706 162 <br />J~w~ sa> >ss <br />Aug-0t ns nz <br />sep-01 ez7 t7s <br />oa-0t aai 172 <br />Nov-01 796 174 <br />Dec-01 78B 178 <br />AVERAGE 764 168 '~^ _ <br />TOTAL <br />Key to above headings: <br />Ave. g/I-GPM - monthly average injection flow rate during process operations. Production in calendar months. <br />Temp. -temperature in degrees F recovered at the pregnant liquor tank. <br />Assay - <br />Tons - <br />production without adjustments per pvity. <br />Figure 4-2 illustrates the 2001 pregnant liquor results and Figure 4-3 represents monthly <br />production for 2001 <br />The balance of injection and recovery rates of cavities #1A, 3A, 4A have been <br />continuously monitored using fluid level. indicators installed in Dissolution Surface aquifer <br />monitoring wells. These wells are located near each of the active cavities. The fluid level <br />data is used to adjust the injection/recovery flow balance as necessary to return or <br />maintain the Dissolution Surface aquifer potientiometric level at. pre-mining historical <br />levels. <br />~~ <br />