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.~ <br />Section 779.14(a) Continued. Rule 2.04.6 <br />Examination of analysis results for specific analysis parameters presented <br />in Table 7, Sudduth Coal Seam Analysis, indicates that the coal seam <br />contains no potentially acid or toxic forming materials. Analysis values <br />for pH, EC, SAR, B, As, Se, Cu, Zn, Mn, Cd, Pb, and N all appear to be <br />within acceptable limits. The calculated acid-base potential for coal <br />seam materials is -4.38 tons CaCO,/1000 tons of overburden. Since this <br />value is above the suspect level of -5 tons CaCO,/1000 tons for overburden <br />it appears that exposed coal seam materials during mining and coal refuse <br />which may be mixed with overburden during backfilling will not result in <br />development of acidic spoil or drainage conditions. <br />Summar <br />In summary, the information presented in this section demonstrates that <br />when analysis values for holes which have been potentially contaminated <br />by drilling fluids are identified, no significant problems with respect <br />to toxicity or, acid-or alkaline-forming potential are indicated for the <br />Kerr overburden. Examination of the data presented in Table 4a, <br />Statistical Description of Overburden Chemical Data, indicates that the <br />ma3ority of the overburden and coal samples are well within acceptable <br />suitability limits and that mixing and the resulting dilution will <br />effectively minimize potential adverse impacts with respect to <br />revegetation and the hydrologic balance. Mixing of overburden during <br />normal operations will result in dilution of the limited volumes of <br />material which exceed suitability ltoits. This dilution will result in <br />blended spoil materials which are well within accepted suitability limits. <br />Therefore, special treatment or handling of spoil will not be necessary. <br /> <br />779-27 b _ <br />~~ <br />ised~ <br />