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Table 4 



Recommended Water Quality Objectives and Excursions, 



1986 Sampling Program, 



East Poplar River at the International Boundary 



(units In mg/L except as otherwise noted) 



(1) Five-year average of flow-weighted concentrations (March to 

 October) should be <2.5 mg/L boron and <1 000 mgA TDS. 

 Ihree-month average of flow-weighted concentrations should be 

 <3.5 mg/L boron and <1 500 mg/L TDS. 



(2) 5.0 mg/L (minimum April 10 to May 15), 4.0 mg/L (minimum 

 remainder of year) . 



(3) Natural temperature (April 10 to May 15), <30 degrees Celsius 

 (remainder of year). 



(4) Less than 0.5 pH units above natural, minimum pH = 6.5. 



