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-2- <br /> The sulfur forms data (Table 3) again show the similarity between all three <br /> lake sediments samples. The data show the samples to be weathered and <br /> contain acid sulfate salts. The two minesoil samples obtained from the waste <br /> rock test plots (89044-1 and 89044-4) have low total sulfur content and <br /> limited pyrite availability. This is in contrast to the original waste rock <br /> sample taken from the test plot area (88050-7) that had a large total sulfur <br /> and pyrite content. These data also confirm the conclusion that samples <br /> 89044-1 and 89044-4 are from the topsoil that was not treated. <br /> The water extraction data in Table 4 point out the similarity in all <br /> parameters of the two minesoil samples (89044-1 and 89044-4) . The data from <br /> samples 89044-2 and 89044-3 show the improvement in all parameters (except <br /> pH) of the ProMac treated lake sediments versus the untreated lake <br /> sediments. The pH of the soil extract from the ProMac treated area is <br /> slightly lower (5.0) than the untreated area (5.4) , but all the other <br /> parameters show the ProMac treated lake sediments to be better. The acidity <br /> of the extract from the ProMac treated lake sediments is almost half of the <br /> untreated area (176 mg/L versus 314 mg/L) and the alkalinity is approximately <br /> double (108 mg/L versus 46 mg/L) . Additionally, the conductivity and <br /> sulfates concentrations of the ProMac treated lake sediments are lower than <br /> the untreated lake sediments. <br /> The 9K data (Table 5) show the effect of the ProMac Systems treatment on T. <br /> ferrooxi.dans in the lake sediments. The original lake sediment sample had a <br /> bacterial population in the range of 200-2,000 bacteria per milliliter. One <br /> ,year later, the bacterial population in the untreated area has increased more <br /> than 100-fold to greater than: 200,000 bacteria per milliliter. During the <br /> same period, the ProMac treated area has shown a 10-fold decrease in the <br /> population of T. ferrooxidans due to the release of bactericide by the ProMac <br /> pellets. <br /> The 9K data for the minesoil samples (89044-1 and 89044-4) further confirms <br /> our theory that they are both untreated topsoil samples. If sample 89044-1 <br /> were indeed ProMac treated waste rock, the bacterial population would be <br /> lower as seen in the lake sediment samples. <br /> The lime requirements data (Table 6) show the effectiveness of the ProMac <br /> Systems treatment in inhibiting acid generation. The original lake sediment <br /> sample (88050-8) had a lime requirement of 2.8 tons per acre. One year <br /> later, the lake sediments from the control area (89044-2) now has a lime <br /> requirement of. 3.6 tons per acre, which shows that there has been an increase <br /> in the amount of stored acid salts created ky ongoing pyrite oxidation and <br /> acid generation. The Pro`).ac treated lake se4iiments received an application <br /> of 1.5 tons per acre calcium carbonate equivalent and combined with the <br /> natural neutralizing capacity of the lake sediments and the inhibition of <br /> further acid production the the ProMac treatment, now has a lime requirement <br /> of zero. Thus, there are no stored acid salts in the soil. <br />