30 

 3.4.2 Water Quality 



The 1994 spring runoff had a positive impact on Cookson Reservoir water quality. At the end of 

 1994, boron concentrations in the reservoir were about 2.4 mg/L compared to about 3.6 mg/L at the 

 end of 1 993. Similarly, TDS decreased from approximately 1 600 mg/L at the end of 1 993 to about 

 1 250 mg/L at the end of 1994. Water-quality conditions at the end of 1994 were similar to 

 conditions in 1 990. 



3.5 Air Quality 



SaskPower Corporation's (SPC) ambient SO2 monitoring for 1994 recorded no violations of 

 Saskatchewan Environment and Resource Management's hourly and 24-hour average standards. 

 The highest recorded hourly value of 0.0493 ppm SO2 was recorded in November 1 994. 



Total suspended particulate concentrations for 1994 obtained from SRC's monitor did not exceed 

 Saskatchewan Environment and Resource Management's 24-hour standard of 120 )ig/m^ 

 (micrograms per cubic metre). The highest recorded concentration was 84.7 \iQ/rn^ in June 1994. 

 The geometric mean for the high-volume suspended particulate sampler for 1994 was 16.0 ixg/m^. 



During the first week of 1994, a new stack-gas analyzer was installed. The analyzer is capable of 

 measuring sulphur dioxide, oxides of nitrogen, and oxygen. It replaced three existing monitors and 

 performed well during 1994. 



3.6 Quality Control 

 3.6.1 Streamflow 



To test the comparability of streamflow measurements made by the U.S. Geological Survey (USGS) 

 and Environment Canada (EC), similar measurements were made on the East Poplar River at 

 International Boundary on November 3, 1994 by personnel from both agencies. The discharges 



