2024-06-07_PERMIT FILE - M2024026 (22)

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Exhibit G Page 2 • One well(Permit No. 3738)located in the NW 1/4 of the SW 1/4 of Section 2 was constructed in 1959 as a domestic well and was reported to have a static water level at approximately 25 ft-bgs at the time of drilling. This stock well will be plugged and abandoned prior to mining. The mining depth will be limited to the economic depth profile of the sand resource,which is anticipated to range from approximately 20-ft.to 30-ft.maximum depth in most areas. Two groundwater wells were identified in areas currently scheduled for mining(Permit Nos.378 and 310849). The static groundwater levels for these wells are approximately 25 to 55 ft-bgs(based on original well records).Based on this information,the depth to the primary aquifer underlying the Site,and reviewing topographic elevations described by the Barnesville, CO USGS topographic map,groundwater is not expected to be disturbed by the planned mining activity(CO DWR,2017). Therefore,operations are not expected to result in any negative disturbance of the identified groundwater system. Presence of Wetland and Waterbodv Features CSC completed a wetland and waterbody delineation in October 2023 to identify the spatial extent and location of wetlands,streams,and other aquatic resources within the Permit Area. For purposes of this Exhibit,CSC considers "Study Area"and"Permit Area"to be effectively equivalent,and such terms are or may be used interchangeably. The wetland delineation and determination surveys were conducted in accordance with the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plains Region Version 2.0(USACE 2010),Corps of Engineers Wetlands Delineation Manual Technical Report Y-87-1 (USACE 1987),and subsequent guidance documents(USACE 1991a,b; 1992). Wetlands are classified by type using the Classification of Wetlands and Deepwater Habitats of the United States,commonly referred to as the Cowardin classification system(Cowardin et al., 1979). The approach recognizes the three parameters of hydrology,vegetation,and soils to identify and delineate wetland boundaries. Representative sampling points were selected to characterize habitat and plant communities and defined bed and bank features were used as criteria to identify streams. Aquatic resources that were identified in the field were mapped utilizing a GPS unit with sub-meter accuracy. CSC followed the September 2023 WOTUS rule to evaluate the jurisdiction of wetlands and waterbodies.Under this rule,the USACE recognizes jurisdictional determinations for wetlands and aquatic resources that are relatively permanent,standing or continuously flowing bodies of water with a continuous surface connection to a jurisdictional water(e.g.,traditional navigable water,territorial seas,interstate water). Wetlands and aquatic resources determined by the USACE as having no continuous surface connection with jurisdictional waters are deemed non jurisdictional. Based on recent USACE guidance and the USACE's 2008 A Field Guide to the Identification of the Ordinary High- Water Mark(OHWM) in the Arid West Region of the Western United States(Lichvar and McColley 2008), delineated waterbodies were identified by the presence of bed and bank or other Ordinary High Water Mark (OHWM)indicators. The USACE criteria to identify jurisdictional determinations for waterbodies include the continuous presence of OHWM indicators and downstream connectivity to jurisdictional waterbodies.Downstream connectivity for delineated waterbodies in the field would be determined based on the continuous presence of an OHWM and connection to downstream waterbodies. Outside the Permit Area where land access was not available, aerial imagery was used to supplement field observations in determining adjacent surface water resources and downstream connectivity.For delineated features that did not have a continuous bed and bank or continuous evidence of an OHWM,these features were determined not to have downstream connectivity. Prior to survey,a desktop analysis was conducted to assess the likelihood of occurrence and probable location of wetlands and waterbodies within the Permit Area.According to the U.S. Department of Agriculture(USDA)Natural Resources Conservation Service(NRCS)digital soil survey mapping of Weld County,there are three mapped soil Colorado Sand Company II,LLC Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application June 7,2024