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Impacts to Groundwater/Hydrologic Balance <br /> Ogilvy River Farm, LLC will monitor the groundwater levels surrounding the site and provide <br /> groundwater recharge if necessary via perimeter ditches/ponds. Ogilvy River Farm, LLC will <br /> construct these ditches/ponds in the locations where direct discharge to an existing adjacent <br /> irrigation lateral is not available to ensure that stabilized groundwater levels are maintained. <br /> They will discharge dewatering flows into existing adjacent irrigation laterals where possible to <br /> limit the disturbance to the surrounding land. A slurry wall liner is proposed around the mine and <br /> will likely be installed prior to the mining starting. <br /> To summarize the mitigation process, as the mining/dewatering occurs, Ogilvy River Farm, LLC <br /> will monitor the groundwater levels adjacent to mine as the mining progresses. If groundwater <br /> levels drop to a level that prevents an adjacent well from performing acceptably, according to <br /> that well's owner, Ogilvy River Farm, LLC will either implement a groundwater recharge <br /> ditch/pond near the well in order to raise the groundwater level in the vicinity of the well and <br /> hence return it's operation to acceptable standards, or will negotiate an agreement with that well <br /> owner to replace the well or provide replacement water via other means until the mining and <br /> reclamation activities are concluded but it is not anticipated that any groundwater levels will drop <br /> since the slurry wall will be installed prior to exposing groundwater. <br /> Groundwater wells that are not owned by Ogilvy River Farm, LLC are potentially located within <br /> 600 feet of the mining limits. The exact physical location of these wells will be determined during <br /> the SWSP and well permit application processes. If wells are found to be within 600 feet of the <br /> mining limits, Ogilvy River Farm, LLC will either obtain a well waiver from the owner of the well, <br /> or provide an agreement with the well owner that Ogilvy River Farm, LLC will mitigate and <br /> material damage to the well that is directly attributable to the mining and reclamation of the site. <br /> All other wells within 600 feet of the mining limits are either owned by Ogilvy River Farm, LLC, <br /> or are monitoring wells therefore groundwater impacts to these wells do not need to be <br /> addressed. <br /> See the attached Piezometer Location Map, and Piezometer Data Summary, which show the <br /> locations of monitoring wells around the perimeter of the site that Ogilvy River Farm, LLC has <br /> either installed or has access to, and the groundwater level data that has been collected for <br /> each well. The groundwater monitoring data will be provided for what has been done to date <br /> with this permit application and then submitted in the annual report for the pit to the DRMS after <br /> approval of the permit application. <br /> Groundwater Quality Monitoring Plan <br /> The majority of the mining operations at this site will be within the slurry wall lined area. The <br /> areas outside of the slurry wall will be limited to the scale house and haul roads for trucks <br /> coming into and out of the pit, which are not likely to affect groundwater quality. <br /> To establish pre-mining groundwater quality at the site Ogilvy River Farm, LLC will have two <br /> monitor wells sampled quarterly. The upgradient monitor well that will be sampled is MW-1 and <br /> the downgradient monitor well that will be sampled is MW-4. The samples will be taken by a <br /> qualified consultant and then tested by SGS Laboratories for the analytes listed in Tables 1-4 of <br /> the "Basic Standards for Groundwater." <br /> •' J&T Consulting,Inc. WW Clydel <br /> g <br /> Bernhardt Sand and Gravel Pit <br /> DRMS 112 Permit Application <br />