GROUND WATER QUALITY 



Saskatchewan 



Ground water sampling continued in 1984 at the locations specified in 

 the Technical Monitoring Schedules. Piezometer C726B is considered 

 to be naturally anomalous due to local soil conditions. Because of 

 the extremely high and variable levels for major ions observed in 

 this piezometer over the period of record, sampling was discontinued 

 at the end of 1983. 



Water Quality in the Tills 



Waters from the tills are of generally poorer quality than those 

 from the Empress Gravels. This is illustrated in Figure 5, where 

 TDS has been plotted for each piezometer. The higher, and more 

 variable concentrations were associated with piezometers completed 

 in till, whereas TDS levels in the Empress-completed piezometers 

 rarely exceed 1 200 mg/L. The differences in concentration observed 

 both spatially and temporally in the tills can be attributed to 

 localized geochemical conditions adjacent to the piezometer intakes. 



Piezometer C712B at location 2a, just to the north of the polishing 

 pond, does not display any consistent variation, or trend in water 

 quality. Aluminum, boron, and strontium appear to have reached a 

 yearly maximum in the July 4, 1984 sampling, but these values de- 

 crease again in the October 10, 1984 sampling. Locations 2b and 2c, 

 also to the north of the polishing pond, likewise display no consis- 

 tent water quality trends over the October 1983 to October 1984 

 period. 



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