34 - 



Sulphur dioxide emissions consisted of 8.5 X 10"3 tonnes per megawatt hour 

 due to firing on coal and 8.0 X 10-5 tonnes per megawatt hour due to 

 firing on oil. Total coal consumption for 1985 was 3,878,000 tonnes and 

 oil consumption was 2,743 tonnes (3,044 cubic metres). 



Average daily opacity readings ranged from 1 to 100%, with a yearly 

 average of 19% as compared to 22% in 1984. Saskatchewan's opacity 

 standard is 40%. In most instances, opacity violations generally occur 

 during process start-up, shut down or when one of the precipitators 

 experiences a power trip. 



Montana 



The State of Montana operated three primary air monitoring sites and five 

 additional sulfation rate sites in the Poplar River area of Montana during 

 1985. The parameters monitored included: sulphur dioxide, total 

 suspended particulate, fine particulates, sulfation rate, wind speed, wind 

 direction, and temperature. The primary air monitoring sites were 

 operated from July 1984 through June 1985 because the 1983 Montana 

 Legislature provided funding for only one additional year of monitoring 

 which commenced after both Coronach units sustained near-capacity 

 operation. The sulfation rate sites were operated for the entire year by 

 utilizing funding from Montana's general air quality budget. The 

 monitoring results are summarized in Table 8. 



