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<br /> <br />We~~ 5•idry and S•Mvy Mrri Dl.A7 fslnplaNS.~.nmy <br />ACID PRODUCING OR TOXIC PRODUCING <br />• Definition of acid producing or toxic producing materials in Rule 1 relate; to materials <br />that contain "detrimental amounts of chemical constituents such as acids, bases or metallic <br />compounds". <br />~~ ~ <br />• Only constituents of concern in the waste rock on site aze uranium and radium; <br />- level of radioactivity in the waste rock is similaz to, or less than the levels present <br />in azeas around the mines that aze completely undisturbed. <br />- EFN is unawaze of any other material on site that would contain detrimental <br />amounts of chemical constituents under the purview of Rule 1. <br />ACID GENERATION <br />• [n terms of potential acid generation concerns, the host rock for ore at the mines is <br />primarily sandstones of the Salt Wash member of the Morrison formation. These <br />sandstones aze not acid formers. <br />- Waste rock from development and mining consists of sandstone withh little or no <br />concentrations of sulfur or other constituents associated with acid roclt generation. <br />- No drainage of water to the surface from the mines; water not encom~tered in any <br />measurable quantities between the surface and the 500 foot level of the mine. <br />N \USERSNffAl~WP~AIRAUEITEAS DS\W SUNSUN PRE <br />Pagc 3 <br />