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boundary, then Lafarge will evaluate the cause, or take action within 7 days as indicated <br />below, and notify the DMG. <br />• If a well goes dry, Lafarge will implement mitigation measures within 7 days. Mitigation <br />measures would include providing a temporary alternative water supply that meets the <br />documented historic well production, or need, until further investigation can be <br />conducted to determine if the well condition is due to the mining operation. Historic <br />production will be documented as outlined in the above section `Wells Within 600 Feet'. <br />After the DMG has been notified, Lafarge will review the available data and information <br />and submit a report to the DMG within 30 days. The evaluation will include discussions <br />with any well owner who has contacted Lafazge regarding a concern and review of <br />baseline data from the well and vicinity to evaluate whether changes maybe due to <br />seasonal variations, climate, mining, or other factors. The report will identify the extent <br />of potential or actual impacts associated with the changes. If the extent of groundwater <br />changes due to mining or reclamation activities is determined to be a significant <br />contributing factor that has, or may create adverse impacts, the mining associated impacts <br />will be addressed to the satisfaction of the DMG. <br />• If, after review, the Division of Minerals and Geology determines that the impact on a <br />well, for which temporary mitigation has been initiated, is not a result of Lafarge's <br />activities, or is not solely a result of Lafazge's activities, then Lafazge shall reduce or <br />cease mitigation accordingly. <br />• Lafarge will begin to implement one or more mitigation measures if mining and <br />reclamation activity is determined to be a significant contributing factor to groundwater <br />changes requiring mitigation. If, however, a subject well has not been put to beneficial <br />use prior to mining, then Lafarge would have no responsibility to provide mitigation. <br />• Mitigation measures, divided into temporazy and long term, may include, but aze not <br />limited to: <br />Temporary: <br />- Compensation for well owner to use their existing treated water system to replace <br />fhe well production loss; <br />- Provide a water tank and deliver water as necessary to meet documented historic <br />well production or need; <br />- Other means acceptable to both the well owner and Lafarge. <br />Long-Term: <br />- Cleaning a well to improve efficiency. <br />- Providing an alternative source of water or purchasing additional water to support <br />historic well use in terms of water quantity and quality. If needed, water quality <br />parameters will be checked in affected wells to ensure alternative sources support <br />the historic use. <br />Lafarge West, Inc. Riverbend <br />Groundwater Monitoring and Mitigation Plan <br />-4- <br />August 2005 <br />H:W 137_012_02\Growdwa[erUtiverbend GW Mon & Mi[igatlon Plan 8-26-0S.doc <br />