3.3.3.2 Montana 



Samples were collected from monitoring wells 7, 16, and 24 during 2005. Well 7 is completed in Hart 

 Coal, well 16 is completed in the Fort Union Formation, and well 24 is completed in alluvium. TDS 

 concentrations in samples collected in 2005 from wells 7 and 24 were less than reported in 2004 and 

 similar to those observed in 2003. Changes in TDS with time for wells 7, 16, and 24 are shown in 

 Figure 3.18. 



Figure 3.18 Total Dissolved Solids in Samples from Montana Wells. 



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