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The Leadville Mill M1990-057 <br /> EXHIBIT U—DMO-EPP <br /> Page 14-16 <br /> 14.8.3 (C) FRACTURE SYSTEM WITH RESPECT TO FACILITIES <br /> ,.legieal „ „teehnie- l rrae-t-ur, ; „stig ,tier. 11 be , na„r+-keR. Leadville Mill area <br /> geological bedrock fractures and faults have not been mapped because the basement <br /> rock is covered by unconsolidated alluvial sands, gravels (as thick as 80 feet) and soils. <br /> 14.8.4 (D) POTENTIAL IMPACTS TO SURFACE AND GROUNDWATER <br /> o;".,G-;as The Mill building and TSF are designed the-pail,.l and the TST to prevent <br /> lea chemicals entering ire surface and groundwater. The impoundment is <br /> double-lined with an a leak detection system. a444 The Mill building +s <br /> designed to eentain spills-is designed as a secondary containment structure. was <br /> adopted To document containment, Leadville Mill has installed a surface and <br /> groundwater monitoring well and reporting program to document the faeility if spill <br /> containment is performing as designed. <br /> 14.9 GROUNDWATER QUALITY DATA (SEc 6.4.21 (9)) <br /> Two groundwater monitoring wells fitted with pumps were installed in 2014 and <br /> quarterly sampled since. Monitoring Well (MW) No. 2 (Permit 295655) is a down- <br /> gradient well which serves as the mill's groundwater point compliance well. The <br /> upgradient well (MW-3) (Permit 295654) serves as a upgradient background water <br /> quality sampling point. Well locations are illustrated on Exhibit 6-2. Copies of the <br /> permits are provided in Appendix 7-11. <br /> 14.9. 1 (A) DOWN-GRADIENT GROUNDWATER USES POTENTIAL <br /> As reported by the office of the State Engineer, as of January 2021 there are 48-3 510 <br /> domestic wells within a 2-mile radius of the Mill, as shown in Figure 14-1. There are <br /> 11 wells located approximately 0.5 miles from the Mill; 8 are domestic, 2 are EPA <br /> monitoring wells and one is an industrial well. These wells are described in Table 14-3. <br /> Version 3.0 January 2021 <br />