Water samples for this study were taken during the summers of 2003 and 2004 from around the Green River and Wind River Basins areas of Wyoming as shown in fig. C-1. Data for the new samples collected for this study are included in a spreadsheet linked to this appendix (geochem_data_analysis_examples.xls). This spreadsheet also contains examples of calculations and charts used by Dr. Leta K. Smith for some data analysis and interpretation tasks.