southeastern lake arm via the Drumbo Unit may carry higher 

 concentrations of some trace elements than do other inflows. 



Arsenic, boron, chromium, iron, nickel, vanadium, and zinc 

 concentrations ranked toward the upper end of the ranges shown by 

 sites classified with Lake Bowdoin. The copper concentration 

 ranked mid-range with respect to sites in the same class, and other 

 trace elements were below reporting limits. Boron exceeded soil 

 concentrations for the western United States by a factor of 3 and 

 arsenic by a factor of 1.3; most other concentrations were near or 

 below regional mean soil concentrations. 



