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Whirlwind Mine Groundwater Characterization Report <br /> The Dolores Point well was sampled and analyzed by EFR in April 2007. The sample was <br /> collected after the well was pumped for 30 minutes at approximately 12.5 gpm. The laboratory <br /> analysis, presented in Appendix A, indicates that the water is of good quality with a total <br /> dissolved solids (TDS) concentration of 344 mg/L, low metal concentrations, and radium activity <br /> levels below detection limits. As stated previously, Figure 8 indicates the Dolores Point well <br /> water is predominantly a calcium- bicarbonate water. The water quality and chemical fingerprint <br /> of the well water is virtually identical with the DP Spring water, which also is interpreted as <br /> originating from the Burro Canyon Formation. <br /> According to EFR (2008), the Cherokee deep and Cherokee shallow wells were sampled by the <br /> BLM in June 2000 and September 1999, respectively. The shallow well had a static water level <br /> of 37 ft bgs and the deeper well had a static water level of 77 ft bgs. The sample analyses <br /> showed that groundwater was similar in both wells with a calcium bicarbonate signature and low <br /> levels of radionuclides. This water had slightly more sodium and less calcium than the Dolores <br /> Point well water but otherwise was very similar in quality. The analytical results for both wells <br /> are presented in Appendix A. <br /> The BLM sampled DP Spring (also named Lumsden Creek) and Willow Spring in July and <br /> August,1993, respectively. Peel Environmental, on behalf of Umetco, sampled DP Spring in <br /> October 1993. Four samples of Lumsden Creek were collected and analyzed in 1997. EFR first <br /> sampled DP Spring in October 2006, followed by sampling events in January and May 2007. <br /> EFR began sampling DP Spring on an annual basis in 2014 and has continued sampling to the <br /> present, including an additional sample in November 2021. Figure 9 is a Piper plot for samples <br /> collected at DP Spring from 2014 through 2021. The figure illustrates the consistency of the <br /> water chemistry of this calcium-bicarbonate type source. DP Spring water has the best water <br /> quality of the sources being monitored. Chloride concentrations are generally less than 15 mg/L <br /> and TDS ranges from 319 to 349 mg/L. <br /> For all sampling events where data were available for the Dolores Point well and DP Spring, no <br /> analytical results indicated an exceedance of Colorado groundwater quality standards. <br /> Western Water& Land, Inc. 28 <br />