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<br />23. The September 16, 1988 Analytical Report presenting acidification <br />/neutralizing potential of the tailing indicate that both the Pyritic Sulfur <br />(-100 mesh measures in tons CaC03 per K-ton) and the Acid-Producing Potential <br />via Peroxide Oxidation (-100 mesh measured in tons CaC03 per K-ton) values are <br />higher than the Acid Neutralizing Potential (-100 mesh measured as tons CaC03 <br />per K-ton), indicting a potential acid-producing potential: <br />Sample #1 Sample #2 <br />Pyritic Sulfur 65.9 70.9 <br />Acid-Producing <br />Potential Via 26.3 24.4 <br />Peroxide Oxidation <br />Acid-Neutralizing 3.7 5.3 <br />Potential <br />Net Neutralization <br />Deficiency <br />From Pyritic Sulfur 62.2 65.6 <br />OR <br />From Peroxide Oxidation 22.6 19.1 <br />PLEASE NOTE: Neutralization deficiencies greater that 5 Tons CaC03 per K-ton <br />are generally considered a potential source of acid mine drainage. {prediction <br />of Acid Drainage Potential in Advance of Mining by Patricia M. Eri~:kson, <br />Richard W. Hammack, and Robert L. P. Kleinmann, in the Bureau of IMines <br />Information Circular Number IC9027/1985 entitled, Control of Acid (dine <br />Drainage Proceedings of a Technology Transfer Seminar). <br />The Division has not had ample opportunity to research the signifir,„ante of the <br />Humidity Cell Testing method, and has therefore relied on the more <br />conventional Static Acidification/Neutralization Potential analyses to make <br />its determination. Therefore, as there appears to be a slight potential for <br />acid production, please describe what mitigation is proposed to ensure that <br />the interburden will not be acid-forming. <br />Therefore, please describe mitigation measures proposed to limit tlhe possible <br />adverse impacts of acidic leachate from the tailing, as well as a monitoring <br />plan to verify that acid production is not occurring <br />