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Groundwater Sampling and Analysis Plan <br /> This information provided in this subsection of Exhibit G is intended to satisfy the requirements <br /> outlined in the Groundwater Monitoring and Protection Technical Bulletin dated November 19, <br /> 2019: <br /> Existing Groundwater Conditions <br /> The near surface groundwater is part of an alluvial aquifer in which permeable sand and gravel alluvium <br /> overlies relatively impermeable bedrock of either the Fox Hills Sandstone and/or the Laramie Formation. <br /> Groundwater, measured in 7 piezometers, occurs at depths usually ranging from 17' to 25' feet below <br /> surface with shallower groundwater to the north of the site. The prevailing groundwater flow at the site is to <br /> the north reflecting the site topography. Groundwater in the area is tributary to the South Platte River <br /> located northwest of the site. Locally the groundwater levels and flow directions are likely influenced by: <br /> ➢ The South Platte River is northwest of the site. For most of the year, the river likely acts <br /> as a drainage way maintaining groundwater levels at elevations greater than water <br /> elevations in the river. In shorter periods of high run off, usually in the spring, river water <br /> levels will locally recharge the groundwater table. <br /> ➢ The Western Mutual Ditch passes southeast of the site under the intersection of Weld <br /> County Road 42 and Weld County Road 29.The ditch may act like a drain during the non- <br /> irrigation season maintaining water levels at or above the water levels in the ditch. During <br /> the irrigation season,the ditch may serve as a source of recharge to the water table. <br /> ➢ The Farmers Independent Ditch traverses the southeast corner of the site and bisects Cell <br /> 5a and 5b. The ditch may act like a drain during the non-irrigation season maintaining <br /> water levels at or above the water levels in the ditch. During the irrigation season, the <br /> ditch may serve as a source of recharge to the water table. <br /> ➢ There is a pond south of Weld County Road 42. This pond likely causes elevated <br /> groundwater levels at the south of the site during the irrigation season. <br /> ➢ There is a pond north of Weld County Road 44. This pond likely causes elevated <br /> groundwater levels at the south of the site during the irrigation season. <br /> ➢ Irrigation: The site is located in an area of irrigated cropland. Applied irrigation that is not <br /> lost to evaporation and transpiration likely recharges the groundwater. <br /> ➢ Alluvial wells: Other than the seven monitoring wells drilled at the site for monitoring <br /> groundwater levels, there are also nineteen pumping wells permitted within 600 feet of the <br /> mine property. There are seven wells north of the site, two wells east of the site, nine <br /> wells south of the site and one well west of the site. If pumping,groundwater will be drawn <br /> to these wells. <br /> Red Tierra Equities, LLC—Section 20 Mine—MLRB 112 Permit Application <br /> Exhibit G-3 <br />