Most trace elements were below detection limits; the copper 

 concentration was mid-range among hydrologically similar sample 

 sites. 



Chemical history. No chemical data other than that provided by the 

 DHES sampling are known for this site. 



Sediments. Extractable concentrations of most trace elements are 

 below detection limits or well within the range for hydrologically 

 similar sites. Selenium and nickel were found near the high end 

 of their ranges for similar sites. Mercury was reported at the 

 detection limit. Copper, nickel, boron and mercury concentrations 

 approximated mean values for soils and other surficial materials 

 in the western U.S. Selenium exceeded the western U.S. mean by a 

 factor of about 2 . 



