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MMRR Quarry, M-2004-067 <br />Response to Jan. 21 Adequacy Review <br />March 23, 2005 <br />Page 8 <br />by the operator, will require the operator to consider uranium <br />ore as an ancillary product. This would require modification <br />of the DMG permit and possibly a hard rock mining permit as <br />well. In this event, a detailed geologic assessment of the <br />site may be appropriate to determine the appropriate course <br />of action. In any event, should uranium ore be discovered <br />on the site, the operator will take action to revise the permit. <br />Other Uranium Content. Uranium as a minor constituent of <br />rock is one of several contributors to ambient radioactivity in <br />Colorado. It is the intent of this Monitoring, Containment, <br />and Control Plan that the MMRR Quarry be held to a <br />reasonable standard for environmentally safe, low levels of <br />uranium on and off the site, taking into consideration both <br />ambient conditions and historical mining impacts in the area. <br />Quarrying rock having a low concentration of uranium <br />mineralization prompts concerns that air and storm runoff <br />may serve as pathways for toxic or otherwise unsafe release <br />of uranium. This plan will therefore implement regular <br />monitoring for airborne and waterborne uranium. <br />Air Monitoring. The operator will monitor, on a monthly or <br />more frequent basis, ambient air quality at a point or points <br />within the active mine, at a point or points within the permit <br />area outside the area of active mining, and at a <br />representative sampling point or points outside the permitted <br />property upon the request and/or with the permission of the <br />land owner. <br />The measurement of ambient air quality will provide data to <br />be compared with toxicology standards as provided below. <br />Stormwater Monitoring. The operator will monitor, on a <br />monthly or more frequent basis, for the presence of uranium <br />in runoff from the site. This data will include analysis of both <br />particulate and dissolved concentrations of uranium at the <br />discharge points of sediment ponds on the site. <br />Stormwater monitoring will develop sufficient data to <br />empirically establish or project to a reasonable degree of <br />accuracy the concentration of uranium in runoff in low flow, <br />10-year, and overFlow conditions. The measurements <br />