Technical Bulletin No. 0692: Bioaccumulation of 2,3,7,8-TCDD and 2,3,7,8-TCDF in Channel Catfish and Largemouth Bass Exposed to Biologically Treated Bleached Kraft Mill Effluent in

This report describes studies designed to determine BAFs for 2,3,7,8-TCDD and 2,3,7,8-TCDF in experimental streams where known concentrations of these compounds were present in water, food and sediments. Channel catfish and largemouth bass were exposed in four streams to O% 4% and 8% biologically treated effluent from a mill with 70% chlorine dioxide substitution. Fish exposed for up to 265 days in the streams were sampled at predetermined intervals and analyzed for 2,3,7,8-TCDD and 2,3,7,8-TCDF.