top of the ranges shown by these elements. Arsenic and boron 

 concentrations rank mid-range within this site's classification. 



Chemical history. No previous water chemistry data from this site 

 are known. 



Sediments. Extractable concentrations of arsenic, boron, copper, 

 iron, nickel, vanadium and zinc rank mid-range among sites within 

 this classification. Most other trace elements were reported to 

 be below detection limits. Only boron exceeded the mean value for 

 soils and other surficial materials of the western United States. 



