ASH LAGOON QUALITY AND QUANTITY 71 



AIR QUALITY 82 



Saskatchewan 82 



Saskatchewan Environment and Public Safety 82 



Sask Power 86 



In-Stack Monitoring 87 



Stack Sampling 88 



Startup and Trip Conditions 89 



Montana 90 



REFERENCES CITED 91 



Tables 



Table 1. 1990 Membership of the Poplar River Bilateral 



Monitoring Committee 3 



Table 2. 1990 Operating Statistics for Generating Unit No. 



1 and No. 2 5 



Table 3. Recommended Water Quality Objectives and Excursions, 1981- 

 90 monitoring, East Poplar River at the International 

 Boundary 32 



Table 4. Recommended Water Quality Objectives and Excursions, 1990 

 Sampling Program, East Poplar River at the International 

 Boundary 35 



Table 5. Historical quality summary, Cookson Reservoir near 



Morrison Dam 37 



Table 6. Yearly abstraction of ground water for supplementary 



supply to Cookson Reservoir 43 



Table 7. 1990 monthly pumpage for supplementary supply to Cookson 



Reservoir 44 



Table 8. Poplar River Power Station salinity project 1990 pumpage 



volumes 4 8 



Table 9. Ash lagoon seepage rates and liner permeabilities at the 



Poplar River Power Station, 1984-90 73 



Table 10. Sulfation rates for five Montana sites operated during 



1990 90 



Figures 



Figure 1. Annual operating hours for the Poplar River Power Station 



Units 1 and 2 6 



Figure 2. Annual power production for Poplar River Power Station 



Units 1 and 2 7 



