water quality, the Committee also recommends that samples of the ash in the 

 ponds be analyzed on an annual basis. 



Parameters that increased in concentration in the ash lagoons were: boron, 

 fluoride, molybdenum, and strontium. The pH also increased. In addition, 

 increased concentrations were observed in the polishing pond for barium, 

 chloride, selenium, sodium, sulphate, and vanadium. 



Ground-water elevations were monitored in 66 piezometers in the vicinity of 

 the ash lagoons and in the area southward to the International Boundary. Six 

 wells were dry at the time of measurement in October 1982. 



Increased ground-water elevations were observed in 52 piezometers and decreased 

 elevations were observed for six piezometers (6a. , 8a-, 8c,, 8c„, 9b_ and OSS'*). 

 The range of increases were 0.11 to 1.6 meters in the till and 0.1 to 0.85 meters 

 in the Empress formation. The water level decline was most pronounced in piezo- 

 meters 8c. (4.31 meters) and 9b„ (4.08 meters) and are anomalously large considering 

 the water level readings reported for the third quarter of 1982. These two 

 piezometers are reported to have low recovery characteristics. 



23. 



