- 67 - 



C775D 



1.6 

 1.4 

 1.2 



1 - 

 0.8 

 0.6 

 0.4 

 0.2 4 



% 



12/19/85 7/7/86 1/23/87 8/11/87 2/27/88 9/14/88 4/2/89 10/19/89 5/7/90 11/23/90 



SAMPLE DATE RANGE 



Figure 56. --Boron in Empress piezometer C775D. 



Southwest of Morrison Dam 

 Locatio ns 18 and 21 



Piezometers C741 and C742 are in the Empress Gravels at locations 18 and 

 21, respectively. TDS as shown in Figure 57, have not indicated any 

 significant changes since the higher values in 1983-84. There are no 

 significant trends for other water quality parameters for these piezom- 

 eters. Water levels for these piezometers as shown in Figure 58, are 

 decreasing since 1986 similar to other Empress Gravel piezometers. 



Overall TDS and CI concentrations are higher and more variable in the 

 till than the Empress Gravels. However, B concentrations are typically 

 higher in the Empress Gravels than the till. 



