concentration reported ranks high among Rocky Mountain sites, while 

 orthophosphorous and total organic carbon concentrations rank mid- 

 range within the site class. Trace element concentrations analyzed 

 were low, with the exception of zinc, which ranked high in 

 comparison to the site class, and lead (which was detected at the 

 reporting limit. 



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



Sediments. Extractable arsenic and iron concentrations rank toward 

 the upper end of the ranges shown for Rocky Mountain sites. Copper 

 and zinc concentrations ranked mid-range or lower in comparison to 

 the site class, and most other trace element concentrations were 

 below reporting limits. The arsenic concentration reported 

 exceeded the mean value for soils of the western United States by 

 a factor of 1.4. 



