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Second Submittal <br /> 7.1.4 Data Collection <br /> As mentioned previously, LRM has already installed 14 monitoring wells and monthly <br /> depth-to-water measurements are already being taken. LRM has committed to collecting <br /> groundwater monitoring data monthly for the first 12 months of mining operations, and <br /> quarterly thereafter for the duration of mining at the Site. LRM proposes, with neighbors <br /> permission, to monitor elevations in these neighboring wells semi-annually prior to and <br /> throughout mine dewatering. Attempts will be made to sample during times when the <br /> neighbors' wells have not been pumped to help distinguish between mine-related and <br /> pumping-related drawdown. <br /> 7.1.5 Water Quality <br /> Groundwater quality is not expected to be impacted by mining at the Site. However, the <br /> Little Cache la Poudre ditch has requested that water quality be monitored. Thus, LRM <br /> has committed to monitoring for pH,iron, selenium and TDS in MW-13. In addition. LRM <br /> has committed to monitoring for these parameters plus oil sheens in the water management <br /> pond and ditch. These are the; typical sector-specific benchmarks tested in CDPHS <br /> discharge permits for sand and'grovel pits and batch plants. The water quality monitoring <br /> plan is attached as Appendix G. <br /> 7.1.6 Proposed Trigger Levels and Corrective Actions <br /> LRM proposes use of a five-foot drawdown as a trigger that would initiate more intensive <br /> monitoring and discussions of potential mitigation measures with neighbors. If required, <br /> LRM will negotiate in good faith to implement corrective actions that are amenable to both <br /> parties. Corrective actions could include: 1) providing a water tap from the West Fort <br /> Collins Water District, 2) deepening wells (there is typically an extra 10 feet to bedrock in <br /> most domestic wells surveyed) to ensure there is still adequate saturated thickness from <br /> which groundwater can be extracted, and 3) re-introducing pumped groundwater through <br /> a leach field or injection well back into the aquifer near the impacted well. <br /> Loveland Ready-Mix Concrete 26 Telesto Solutions,Inc. <br /> zoiaoi 1z_gro-dwa.study_zmLxdmut"d— January 2018 <br />