3 



the power plant and mine; examined data collected in 1993 including surface-water quality and 



quantity, ground-water quality and quantity, and air quality; established the Technical Monitoring 

 Schedules for 1994; discussed proposed changes in water-quality objectives; and toured the power 

 plant, ash lagoons, mine, and other ancillary facilities. The Committee also prepared the first draft of 

 the 1 993 Annual Report to Governments. 



2.3 Review of Water-Qualltv Ob)ectlves 



The Intemational Joint Commission In Its Report to Governments, titled "Water Quality In the Poplar 

 River Basin," recommended that the Committee "periodically review the water-quality objectives 

 within the overall Basin context and recommend new and revised objectives as appropriate." In 

 1991, the Committee undertook a review of water-quality objectives. 



The Committee approved changes In water-quality objectives recommended by the 1991 

 subcommittee which was formed to review the objectives. Revised objectives approved by the 

 Committee are listed in Table 2.1 . 



The Committee discussed the water-quality objectives for 5-year and 3-month flow-weighted 

 concentrations for total dissolved solids and boron. Although the Committee agreed that calculation 

 procedures to determine flow-weighted concentrations are time consuming and probably 

 scientifically questionable, no consensus was reached on alternative objectives or procedures. 



Objectives for un-ionized ammonia, pH, and mercury in fish tissue will require additional study. 



