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and Environment Water Quality Control Commission standards. During the <br />hearing, Applicant committed to continue monitoring for selenium and represented <br />that they will run full spectrum tests as part of their water quality monitoring plan. <br />20. Applicant's monitoring wells will also be used to monitor potential <br />drawdown as mining begins and potential groundwater mounding after clay liners <br />are installed in the pits. Mitigation plans for each possible change in groundwater <br />levels were discussed at length during the hearing. <br />21. Dewatering during the mining process may cause drop in groundwater <br />levels, and Applicant's model estimates a possible drop of up to five feet at their <br />monitoring wells at the perimeter of the site. Because the monitoring wells are one <br />hundred feet from the perimeter on site, any drop or rise in groundwater level <br />would likely be less outside the site's boundary <br />22. Objector Tilley presented testimony regarding three wells on her <br />property, which are in close proximity to the perimeter of the site. Objector Tilley <br />also presented testimony arguing that the drawdown during mine dewatering <br />would leave her wells dry. <br />23. Applicant testified that its mitigation plan covers surrounding <br />properties, including those belonging to Objector Tilley. <br />24. Applicant presented testimony regarding mitigation efforts should <br />groundwater levels drop by five feet or more. The Applicant's mitigation plan <br />includes provisions for reintroducing pumped groundwater through a leach field or <br />injection well back into the aquifer near the affected well, providing a water tap <br />from the West Fort Collins Water District, and/or deepening the affected well. <br />25. Applicant also presented testimony specifically addressing the <br />potential of drawdown adversely affecting Objector Tilley's wells, stating that they <br />would run water into the ground on the side of Tilley's property to act as a <br />hydrodam, which would cause groundwater to back up and recharge Objector <br />Tilley's wells. <br />26. Applicant presented testimony that drawdown of groundwater will end <br />when the liner in a pit is installed and that liners should be installed within one <br />year of excavation in a pit. <br />27. Because the clay liners in the pits are not permeable, they may cause <br />groundwater mounding. Groundwater mounding has the potential to affect off-site <br />structures and property. <br />Loveland Ready Mix Concrete, Inc. <br />Knox Pit/M-2017-036 4 <br />