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All this considered, I would not anticipate any adverse health effects from the tailings, because <br /> the SPLP concentration for Mn in below the health advisory. I would also not anticipate that <br /> drinking water standards would be violated (unless they are violated already by the ambient <br /> condition) at the 5 mile distant well because the amount of water it would take to carry the Mn to <br /> that point would mask, either through dilution or from higher ambient Mn concentrations, the 03 <br /> mg[L Mn in the leachate. <br /> Therefore, I would advise that the Division to accept as reasonably protective the results of the <br /> SPLP test submitted to the BLM, for Mn as well as all the other measured parameters. It would <br /> be useful for DMG records if the operator would provide a dilution or mixing calculation <br /> showing how much of the leachate might be detectable at the water table or at the 5 mile distant <br /> well, and thereby assure that our calculations indeed provide reasonable assurance of <br /> groundwater protection. Whatever result might develop, it seems evident from the data that <br /> human health would be protected, under any dilution/mixing situation. <br /> Attachment (Manganese in Drinking Water) <br /> cc: Carl Mount w/attachment <br /> Jim Pendleton w/attachment <br /> I <br />