31 



3.3.3.2 Montana 



Samples were collected from monitoring wells 7, 16, and 24 during 2001. Well 7 is completed in Hart 

 Coal, well 16 is completed in the Fort Union Formation, and well 24 is completed in alluvium. No 

 significant changes in TDS were observed in monitoring wells. Changes in total dissolved solids with 

 time for the above wells are shown in Figure 3.18. 



Total Dissolved Solids 



Figure 3.18 Total Dissolved Solids in Samples from Montana Wells. 



