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concentrations are not"significant" and the rock is not grossly acid generating, no special precautions <br /> are anticipated to be necessary. If,sometime in the future, significant sulfide bearing rocks are <br /> discovered,then the issue will be addressed at the time it occurs. <br /> Comment 7a Please confirm if water will be used in the rock size reduction process <br /> Response: The initial size reduction process is blasting,and water is certainly used per MSHA <br /> requirements to keep dust down. No evidence of acid generation has been found. As for further size <br /> reduction,the exploration project is not far enough along to determine much about processing and <br /> whether water will be used or not. That question can only be answered in the future, if and when <br /> economic grade materials can be found. <br /> Comment 7b How are crusher fines handled? <br /> Response: Since the typical mining operation only crushes materials that are part of the split which is <br /> intended to be sold, it is important in the process to retain all ore materials, including the finer grained <br /> fractions that are to become part of the final product. It is likely that this operation will be similar and <br /> that the finer grained fractions will become very important to its success. As a result,any fines <br /> generated will most likely be saved. However, at this time the project is only in exploration stage and <br /> will need to get closer to mining stage before any final determinations can be made. As a general <br /> background and a contrast, a metal mine generally strives to collect the finer fractions as part of the <br /> segregation process from the country rock, while a typical gravel operation works to reincorporate their <br /> fines back into the mix to serve as a binder with the coarser product to make road base. <br /> Exhibit D—Mining Plan <br /> Comment 8-Temporary Structures—DRMS acknowledges slopes of up to 1 to 3 from a topo <br /> map paragraph(b) <br /> Response: Sometimes a topographic map at a scale of 1 to 24, 000 with 20-foot contours is not quite <br /> accurate enough for determining the actual slopes for areas of less than 10 acres. The actual slopes in <br /> the area can exceed 1 to 2(V:H). During reclamation, in areas that the surface is to be put back to near <br /> original,the goal will be to match the final grade with that of the pre-mining surface. With the property <br /> owner's permission,the disturbed areas located near the south edge of the permit area will get this <br /> treatment. The property owner's preference is to retain as much level area as possible for agricultural <br /> purposes so the adjacent slopes will be kept as steep as possible. The target for final uphill slopes will <br /> 4 <br />