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 GROUND WATER QUALITY 



Saskatchewan 



Ground water sampling continued in 1986 at the locations specified in 

 the Technical Monitoring Schedules. 



Water Quality in the Tills 



Waters from the tills are of generally poorer natural quality than 

 those from the gravels. The ground water quality data for total 

 dissolved solids, shown in Figure 9, have demonstrated this during 

 the past 6 years. Higher and more variable TDS concentrations are 

 associated with piezometers completed in till, whereas concentrations 

 in Empress-completed piezometers have rarely exceeded 1,200 mg/L. 



Piezometer C712B, at location 2a just north of the Polishing Pond, 

 was observed to have an increased concentration of uranium in 1984 to 

 mid-1985. This condition generally continued during 1986. With the 

 exception of one sample, taken in October 1985, the readings remained 

 above 550 Vg/L. Other ions in the piezometer water do not show 

 patterns that are similar to that of uranium. 



