figure 42. Boron in intra-till sand piezometer C712B 58 



Figure 43. TDS in piezometer C712B and till piezometers C718 and 



C719 59 



Figure 44. Chloride in piezometer C712B 59 



Figure 45. Zinc in piezometer C712B 60 



Figure 46. Water levels in piezometer C712B 60 



Figure 47. Chloride in till piezometers C718 and C719 61 



Figure 48. TDS in till piezometers C714A and C714D 62 



Figure 49. TDS in Empress piezometer C714E 63 



Figure 50. TDS in Empress piezometer C533 and till piezometer C534. .63 



Figure 51. TDS in till piezometers C774B and C775A 64 



Figure 52. Boron in till piezometers C774B and C775A 65 



Figure 53. Chloride in till piezometers C774B and C775A 65 



Figure 54. TDS in Empress piezometer C775D 66 



Figure 55. Chloride in Empress piezometer C775D 66 



Figure 56. Boron in Empress piezometer C775D 67 



Figure 57. TDS in Empress piezometers C741 and C742 68 



Figure 58. Water levels in Empress piezometers C741 and C742 68 



Figure 59. Concentrations of major ions in milliequivalents per 



liter in water from four major aquifers 69 



Figure 60 . Total dissolved solids concentrations for water from 



selected wells during the period of sampling 70 



Figure 61. Ash lagoon seepage rates at the Poplar River Power 



Station, 1984-1990 72 



Figure 62 . Water-quality data from the Polishing Pond and Ash 



Lagoon No. 2 for selected constituents, 1983-1990 76 



Figure 63. Saskatchewan maximum hourly sulphur dioxide air quality 



data during 1989-90, Coronach water treatment plant. . . .83 



Figure 64 . Saskatchewan maximum daily sulphur dioxide air quality 



data during 1980-1990, Coronach water treatment plant. . .83 



Figure 65. Saskatchewan maximum hourly sulphur dioxide air quality 



data during 1985-90, Coronach water treatment plant. . . .84 



Figure 66. Saskatchewan maximum daily sulphur dioxide air quality 



data during 1986-90, Coronach water treatment plant. . . .84 



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