STUDY NUMBER ; 6.2 (COMPLETE) 



ORGANIZATION ; Environmental Protection Agency (EPA) 



TITLE OF STUDY ; Chronic Bioassays of Champion International 

 (Stone Container) Effluent 



CONTACT ( S ) ; Dick Montgomery - Environmental Protection Agency 



- 449-5486 



Loren Bahls, Montana Department of Health and 

 Environmental Sciences, Water Quality Bureau - 

 444-2406 



OBJECTIVE ; Determine the toxicity of the pulp mill effluent 

 to juvenile rainbow trout and Ceriodaphnia . 



DURATION : 1985 



CURRENT STATUS ; From May 13 to June 12, 1985, thirty-day flow- 

 through bioassays were conducted using recently emerged (button- 

 up stage) rainbow trout. Dilutions of Stone Container Corporation 

 (Champion International) waste water that were tested ranged 

 from 2.0% (1;50 dilution) to 0.2% (1;500 dilution), plus controls 

 (0.0% effluent). Two separate dilution sources (river water 

 and local well water) were used for the trout toxicity tests. 



A seven-day Ceriodaphnia test was conducted using the same 

 dilutions of Stone Container Corporation (Champion International) 

 wastewater as with the trout bioassay, plus the addition of a 

 4.0% (1:25) dilution. Only river water was used in these bio- 

 assays. 



An additional seven-day Ceriodaphnia test was conducted 

 using the Clark Fork River water from nine locations--three above 

 and six below Stone Container Corporation's (Champion Interna- 

 tional) discharge. 



PUBLICATIONS AND REPORTS 



Findings of Chronic Bioassays at Champion International paper 

 Mill, Frenchtown, Montana. May 13 - June 12, 1985. Prepared 

 by D. W. Nimmo, J. Lazorchak, D. Link, S. Potts and M. Kerr. 

 US Environmental Protection Agency, Region VIII, Denver, Colorado, 

 U.S. Environmental Protection Agency Montana Operations Office, 

 Helena and Montana Department of Health and Environmental Sci- 

 ences, Helena, Montana. 



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