30 



3.4.2 Water-Quality 



The 1995 spring runoff had little positive impact on Cookson Reservoir water-quality. At the end 

 of 1995, boron concentrations in the reservoir were about 2.4 mg/L compared to about 2.4 mg/L 

 at the end of 1994. Similarly, TDS increased from 1 250 mg/L at the end of 1994 to about 1 400 

 mg/L at the end of 1995. Water-quality conditions at the end of 1995 were similar to year-end 

 conditions in 1993 and early 1992. 



3.5 Air-Quality 



SaskPower's ambient SOj monitoring for 1995 recorded no violations of SERM's hourly and 24- 

 hour average standards at 0.17 and 0.06 ppm, respectively. The highest hourly value was 

 recorded at 0.0413 ppm in June, 1995. 



Total suspended particulate concentrations for 1995 obtained from SaskPower's monitor did not 

 exceed SERM's 24-hour standard of 120ug/m^ The highest recorded concentration was 60.6 

 ug/m' in June, 1994. The geometric mean for the high-volume suspended particulate sampler was 

 15.7 ug/m^ 



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 the International Boundary on August 23, 1995 by personnel from both agencies. The discharge 

 data shown in Table 3.5 are similar although not identical indicating the difficulty of obtaining 

 the same measurements of small discharge using conventional current-metre methods. The 

 computations were made using the theoretical discharge of the 9CP V-notch weir of 0.067 ra?/s. 



