Chemical history. No other chemical data from this site are known. 

 Water quality concerns at the refuge have included sediment and 

 herbicides in conveyances linked to refuge water supplies. 



Sediments. Extractable arsenic, boron, iron and zinc were reported 

 at concentrations near or at the lower end of the ranges shown by 

 the entire data set. Most other trace elements were below 

 reporting limits. None exceeded the mean values for soils and 

 other surficial materials of the western United States. 



