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elevated detection limits was a decision by the laboratory to dilute the <br />sample prior to analyses in order to reduce the effects of interferences <br />(primarily, high salinity). <br />In a letter dated June 5, 2008, Tom Kaldenbach of the CDRMS stated that <br />"Groundwater points of compliance are unwarranted at the Hayden Gulch <br />Loadout...". He further concluded that "... any leachate originating at the <br />loadout would likely be of better quality than native groundwater in the <br />Lewis Shale which has high concentrations of dissolved solids." This <br />letter was provided in the 2008 AHR, Figure 3 (Appendix A) . Monitoring <br />conducted this year at the Loadout supports these conclusions. <br />Summary <br />The Loadout appears to have little to no impact on the surface and <br />ground water systems in the area. Irrigation return water upstream of <br />the Loadout, along with topsoils derived from the Lewis Shale (which has <br />naturally elevated concentrations of selenium and dissolved solids), are <br />dominate in determining the water quality in the vicinity. Furthermore, <br />the dry weather conditions that occurred in 2013 may, in part, be <br />responsible for some of the water quality standard exceedances noted <br />this year. <br />