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20) On pages 12 13, the discussion on stockpiles should include text indicating that <br /> soil management practices will protect the soil piles from erosion, prevent <br /> contamination of the soil from toxic or acid-forming material, and ensure that the <br /> soil will remain usable for reclamation. <br /> Raptor Materials First Adequacy Response <br /> Comments 20, 23 and 32 we believe are best addressed in a comprehensive rather <br /> than fragmented manner. <br /> Consistent with the backfill permit, it would be highly unusual that an alluvial <br /> aggregate operation would find potentially toxic or acid forming materials, nor <br /> would they if found be utilized. Sulfur is sometimes used on plains soils where <br /> acidification moderates alkalinity or the planting of evergreen trees which prefer a <br /> slightly acidic soil. Nonetheless the Operator's intent is not to create or import <br /> such a problem. If found on site such materials would be disposed of in an <br /> appropriate landfill. The application does attend to the real threat on irrigated <br /> lands, which is the accumulation of salts due to evapotranspiration in some <br /> circumstances of the lower soil profile, which profile is significantly absent in Unit <br /> 3 Soils, as iterated here: <br /> Continued...next page... <br /> 221Page <br /> Correspondence to the Colorado Office of Mined Land Reclamation—Reply to Rob Zuber,EPS—Adequacy betters of 24 June and 5 <br /> August 2022; in the matter of the Two Rivers Sand,Gravel and Reservoir Project—M2022-0 i 3. <br />