80.00 



,2 60.00 



40.00 



■fe 20.00 



0.00 



I 



TEWWPA- WET67 



PPM IN SEDIMENT 

 DETECTION LIMIT 



I J 



IH 



I r 



1 r 



I T^ \ \ \ [ 



Cu Sb Be Pb B Cd Mo Cr Co V As Hg Se Ni Zn 



