sites within this class, and the anunonium concentration was below 

 reporting limits. The total organic carbon concentration was among 

 the lowest for all sample sites. 



Most trace element concentrations analyzed were below reporting 

 limits. The iron concentration was comparatively low, and boron 

 occurred at the reporting limit. 



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



Sediments. Extractable arsenic and copper concentrations ranked 

 toward the bottom of the ranges shown for Rocky Mountain sites. 

 Boron, iron, chromium, nickel and zinc were all relatively high 

 within the site class, and were exceeded mainly at sample sites 

 with known impacts from raining or mineral processing. The 

 extractable zinc concentration exceeded the mean value for soils 

 of the western United States by a factor of 1.4, and nickel and 

 boron exceeded the regional mean soil concentrations by small 

 factors. 



