the three highest in the sample set, exceeded only by sites with 

 known mining impacts. WET56 was among the handful of sites with 

 a reportable mercury concentration. Arsenic, boron, copper, 

 selenium and zinc all occurred in detectable concentrations, all 

 ranking mid-range with respect to other Rocky Mountain sites. None 

 exceeded the mean concentrations for soils of the Western United 

 States. 



