- 15 



Short-Term Objective (3.5 mg/L) 



from sample analysis 

 from regression 



Figure 7. Boron Three-Month Moving Flow-Weighted Concentration, 

 East Poplar River at International Boundary. 



4.0-- 

 S.8-- 



3.8-- 

 3.4-- 



3.2-- 



3.0-- 



O) 2.4-- 



— 2.8-- 



2.0- 



O I-*" - 



m 1.4-- 



Lonq-Term Objective (2.5 mq/L) 



l.o-- 

 o.a-- 

 o.e-- 



0.4-" 

 0.2- 



Figure 8, 



Boron Five-Year Moving Flow-Weighted Concentration, 

 East Poplar River at International Boundary. 



