indicate that copper and zinc sediments concentrations in the 

 lower river reservoirs are about ten times lower than those 

 found in the Clark Fork arm at Milltown. However, sediment 

 concentrations of copper and zinc are still elevated over 

 background levels — four to eight times higher than the 

 control stations in the Blackfoot arm of the Milltown 

 Reservoir. Arsenic concentrations from the acetic acid 

 extractions ot not appear to be significantly elevated 

 in sediments of the lower river reservoirs. 



A report of the findings of this study, including total 

 extractable heavy metal values, will be published in the 

 proceedings of the 1985 Montana Academy of Sciences (winter 

 of 1986): "Heavy Metals in Bottom Sediments of Clark Fork 

 River Reservoirs." 



FUTURE ACTIVITIES ; Depending upon the availability of funds, 

 additional field work may be conducted during 1986. 



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