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• Appendix I. These data are presented in table form with accompanying historical <br />hydrographs. <br />Water Chemistry. Ground water quality data for samples collected at the Nucla and Nucla <br />East mining areas during the 1987 water year are presented in Appendix J. Included also <br />in Appendix J are statistical summaries by aquifer for each mining area. The statistical <br />summaries are a compilation of all water quality data collected up to and including the <br />1987 water year. A revised ground water parameter list describing all parameters that are <br />analyzed for and the units in which they are reported is presented on Table 6. When <br />perusing the aquifer statistic summaries, it must be noted that for the trace elements <br />there have been varying detection limits throughout the sampling history. All values for <br />trace elements are shown as absolute values rather than as the detection limits (less <br />than), resulting in means and minimum values of parameters not representative of the <br />parameter sample population. <br />u <br />• <br />15 <br />