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3. WATER QUALITY MONITORING <br /> 3.1 Introduction <br /> As part of this Sampling and Analysis Plan (Plan), the Operator will test for water quality <br /> at Nix. The purpose of this Plan is to protect the integrity of the region's groundwater <br /> quality and to meet the requirements set forth in DRMS rules and regulations and the <br /> Colorado Department of Public Health and Environment (CDPHE) Regulation No. 41. <br /> More specifically, the Plan will provide baseline and long-term water quality data for surface <br /> and groundwater conditions at the site. Long-term monitoring results will be compared to <br /> baseline conditions to determine if gravel pit operations have impacted water quality <br /> either from mining activity or from trucks moving mined material offsite. <br /> The Plan provides for the collection of pre-operational water quality data (baseline data) <br /> that will ultimately be used to compare with results from continuing long-term water quality <br /> monitoring. Collection of pre-operational groundwater levels has also occurred as part of <br /> the Plan. <br /> 3.2 Sampling Methodology <br /> This section identifies the groundwater sampling locations, selected parameters, <br /> frequency of tests, analytical techniques, the method of interpreting the results of the <br /> tests, and general program operation. <br /> 3.2.1 Background Monitoring and Point of Compliance (POC) <br /> Locations <br /> Seven water quality sampling wells have been identified to evaluate pre-operational water <br /> quality and potential impacts to surface and groundwater. An additional six wells will be <br /> monitored for groundwater elevations, but not sampled for water quality. The location of <br /> the monitoring locations is shown above in Figure 2; the locations and their purpose are <br /> summarized in Table 2 below. <br /> Table 2: Groundwater Monitoring Stations <br /> Station Type POC Location Purpose <br /> Well <br /> Nix-Owens-Mon 1 Water No Southwestern To establish groundwater flow direction,not used for water <br /> Elevation perimeter of site. quality sample collection.Included in monthly water level <br /> sampling. <br /> Nix-Owens-Mon 2 Water Quality No Southwestern To establish upgradient water quality in the southwest corner of <br /> &Water perimeter of site. the site.Can be compared against other downstream wells to <br /> Elevation determine potential influence from mining operations. <br /> Nix-Varra-Mon 3 Water No Southwestern To establish groundwater flow direction,not used for water <br /> Elevation perimeter of site. quality sample collection.Included in monthly water level <br /> sampling. <br /> 8 <br />