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Nix Site Groundwater Contamination Potential <br /> March 31, 2023 <br /> lining and potential continued dewatering at the M 1999-006 site may be controlling the <br /> direction of flow for a significant portion of the Nix Site. <br /> ' 1. eau <br /> a+ , • a <br /> Ln <br /> '_- cc <br /> M 1999006 <br /> 010, " — Nix Permit Boundary <br /> Adjacent Mine Permit Boundaries <br /> M2015033 Nix Monitoring Well <br /> General Direction of Groundwater Flow <br /> fagg <br /> 4793 <br /> M2009018 <br /> - 4789 <br /> 4785 Groundwater Elevation <br /> (ft msl,Jan 2023) <br /> 4781 <br /> 4777 <br /> N <br /> Oft 2000 ft 4000 ft <br /> Y <br /> Figure 3.Nix groundwater levels,wells,and adjacent mine sites <br /> The three adjacent mine sites operated by Raptor Materials LLC., DRMS Permit Nos. <br /> M1999-006, M2009-018 and M2015-033 (Figure 3),to our knowledge do not have permit <br /> requirements for monitoring groundwater quality and given the close proximity of these <br /> sites and the fact that they change the hydrologic regime of the area it does not seem that <br /> RMCC should be required to perform monitoring that is not required of the other sites. This <br /> is particularly true as dewatering and lining operations at the sites and at the Nix Site have <br /> the potential to change the groundwater flow paths such that any potential contaminants <br /> DINATALE WATER CONSULTANTS 5 <br />