2018-01-16_PERMIT FILE - M2017036 (2)

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Second Submittal 5.3.4 Water Quality One of the concerns voiced by neighbors during the neighborhood meeting was the potential for water quality impacts from the Site. No constituents of concern are produced on site that could significantly impact water quality. Constituents of concern contained in fuel, cement, and admixtures are fully contained and tracked. Primary containment is backed up by secondary containment (e.g.,buildings, storm water containment, secondary containers/liners). Thus, there is no exposure of waters to chemicals. Additionally, all surface and storm water will be contained on site. Thus, there can be no off-site impacts to surface water. Similarly, the direction of groundwater flow during all phases of mining is towards the dewatering sump. iThus, there can be no off-site migration of groundwater 4. should the unlikely event of a release occur. 5.4 Discussion 5.4.1 Model Stability The model converged to,a soli ion during every iteration for the calibration and predictive scenarios, meeting the minimum error criteria in the heads of 0.001 foot. No other significant errors were reported in the model runs. These statistics provide confidence that the model runs were numerically accurate and that the results are numerically sound. 5.4.2 Predictive Results Based on the good correlation and numerical stability of the model, confidence can be placed in the predictive results. The predictions provide a good indicator of areas that will require special attention as dewatering progresses and gives the opportunity for LRM and neighbors to be pro-active. 6.0 MITIGATION STRATEGIES Prior to implementing any mitigation strategies for neighboring wells that could potentially be impacted, LRM will discuss the options with neighbors and evaluate suitability of the three mitigation strategies described in Section 5.3.1. To aid in the evaluation, the reinjection strategy is simulated for the Plantorium and Morgan Timber wells. Loveland Ready-Mix Concrete 21 Telesto Solutions,Inc. 20180112_gmwalwale tuay_2ndsubnunalaocx Jan uary2018