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Personnel from Environment Canada and Saskatchewan Environment and 

 Public Safety undertook a field investigation on July 7, 1986 of the 

 Girard Creek and East Poplar River water quantity and quality monitor- 

 ing sites located above Cookson Reservoir. On the basis of this 

 investigation, the water quality station on Girard Creek was relocated 

 downstream to a point between Coronach and Cookson Reservoirs to 

 provide a better estimate of the quality of water entering the 

 reservoir. Although it was considered desirable to have the quantity 

 and quality stations co-located, the need could not justify the high 

 cost of relocating the Girard Creek hydrometric station from its 

 current location above Coronach Reservoir. 



It was noted that flow in the East Poplar River at the hydrometric 

 station 15 km above Cookson Reservoir is typically near zero with the 

 exception of a 3- to 4-week period during the spring. Water quality 

 monitoring samples will not normally be collected at this hydrometric 

 station, but will continue to be collected quarterly in the upper end 

 of Cookson Reservoir at Highway 36. 



Quality Control 



Quality control sampling was conducted at the East Poplar River at 

 the International Boundary on July 8, 1986. Sets of triplicate 

 samples were collected and submitted to eight Canadian and United 

 States laboratories for analyses. In addition, reference water 

 samples were exchanged and submitted to the respective Federal 

 laboratories and the Saskatchewan Research Council. 



