15 



Figure 3.8: Boron Concentration for 1999 Grab Samples from East Poplar River at the 

 International Boundary 



2.2 



1.8 



i 



♦ 1.74 



♦ 1.75 



♦ i « i ♦ i. a 



< ► 1 .86 



1.6<M-61. 



♦ 1. 6 



♦ 1.64 



♦ 1.5 



♦ 1.29 



1.2 



0.8 



♦ 1.15 



♦ 0.90 ♦ 0.9 



Figure 3.9: Three-Month Moving Flow-Weighted Boron Concentration for East Poplar 

 River at the International Boundary 



3 . 



2.5 



<o (b n o> f& <b 



-Grab sample derived data 

 ■Regression derived data 



O o o o 



o» to o -» 



CO 00 OS 09 » W 



n(9ttn(b(b<btb(b(b(t(0(b 



"OOOOOOOOOOO 



<DO-'row4koia>-joo«> 



