3.5 Air Quality 



SaskPower's ambient SO2 monitoring for 2004 recorded no values greater than Saskatchewan 

 Environment's one-hour average standard of 0.17 ppm and the 24-hour average standard of 0.06 ppm. 

 The ambient SO2 monitor was replaced in January 2001 which has greatly improved the availability of 

 this information. The 2004 geometric mean for the high- volume suspended-particulate sampler was 16.2 

 )ag/m^/24 hours and 2004 was the thirteenth consecutive year of below-average particulate readings. 



3.6 Quality Control 



3.6.1 Streamflow 



No joint current-meter discharge measurements were obtained this year by personnel from the U.S. 

 Geological Survey and Envirormient Canada to confirm streamflow measurement comparability at the 

 East Poplar River at International Boundary site. 



3.6.2 Water Quality 



Quality-control sampling was not carried out at the East Poplar River at International Boundary due to 

 suspension in collection of surface-water-quality samples by Environment Canada this year. 



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