Concentrations of other nutrients ranked generally mid-range for 

 sites in this classification. 



Arsenic, boron, chromium, and copper concentrations ranked mid- 

 range for sites in this classification. Reported lead and iron 

 concentrations ranked toward the upper end of their respective 

 ranges • 



Chemical history. No previous water quality data are known for Fox 

 Lake. The reported character of the lake prior to impoundment 

 (perennial but highly variable in extent) suggests that salinity 

 and other chemical characteristics were probably more variable in 

 the past than now. 



Sediments. The concentration of arsenic reported for WET20 ranked 

 near the upper end of the range shown by sample sites in this 

 classification. Concentrations of boron, copper, chromium, nickel, 

 vanadium and zinc ranked mid-range in their respective ranges for 

 sites classified with WET20. Fox Lake was among a small handful 

 of sites not known to be impacted by mining or mineralization where 

 mercury was reported from sediment (at the detection limit). 



The boron value exceeded the mean soil concentration for the 

 western U.S. by a factor of 1.6, and nickel and zinc concentrations 

 exceeded regional mean soil values by small factors. Other trace 

 element concentrations were reported below the regional mean soil 

 concentrations . 



