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RIDER TO MINING PERMIT Permit Date: December 15, 2006 Permit No.: M-2004-067 The fallowing additional stipulations and conditions form an integral part of the foregoing permit: Stipulation No. Description 1 Groundwater Monitoring Prior to initiation of any blasting, earthmoving, or excavating activities at the MMRR Quarry, the Operator will submit a technical revision, for Division review and approval, containing a groundwater monitoring plan that meets all requirements of Rule 3.1.7. A copy of the technical revision application will be provided, by the Division, to all parties to the Board Hearing of the original permit application. The copies will be sent to the parties, at their last known addresses, as soon as possible following the Operator's filing of the technical revision. At a minimum, the technical revision application must include plans to construct at least one monitoring well hydraulically up-gradient and one monitoring well hydraulically down-gradient from the proposed quarry. The technical revision must include plans to collect and analyze samples from the wells for a minimum of five calendar quarters to establish baseline groundwater quality conditions and piezometric levels. In order to statistically analyze the baseline data, a minimum of eight samples are required; the timing of sample collection must be as equally spaced over the five quarter baseline characterization period as is practicably possible. Parameters to be monitored must include gross alpha, radium 226 and 228, uranium, thorium 230 and 232, pH, turbidity, and static water level. Following the collection of baseline data and prior to initiation of any blasting, earthmoving, or excavating acfivities at the MMRR Quarry, the Operator will submit a technical revision, for Division review and approval, which presents the baseline data and provides a plan for on-going monitoring including an analysis of parameters to be monitored. A copy of the technical revision application will be provided, by the Division, to all parties to the Board Hearing of the original permit application. The copies will be sent to the parties, at their last known addresses, as soon as possible following the Operator's filing of the technical revision. The technical revision will contain the Operator's proposal, in accordance with Rule 3.1.7, for point(s) of compliance, numeric protection level(s), additional monitoring locations, if any, reporting plans, including reporting frequency, and a commitment to report in writing to the Division, within five working days, when there is evidence that an established numeric protection level has been exceeded at a point of compliance. The technical revision must also contain an action plan for instances where numeric protection levels are exceeded at points of compliance, such action plan to include immediate resampling of the point of compliance, expedited analysis of the resample, and reporting of the resample results to the Division within 24 hours of the Operator's receipt of the results. If the resample substantiates that a numeric protection level has been exceeded, the Operator will file with the Division, within ten working days, a mitigation plan to control the release of contaminants exceeding numeric protection levels to areas down-gradient of the compliance point. The requirement to provide a mitigation plan within ten working days may be accelerated if the Division determines that there is an imminent threat to persons, property or the environment. Ground Water Supply The Applicant will comply with state law regarding impacts to ground water as more particularly described in the September 15, 2005 "Response to Reclamation Permit Application" from the Office of the State Engineer to the Division of Minerals and Geology and the conditions contained therein.