Technical Bulletin No. 0642: Ambient Chloroform Concentrations in the Vicinities of Bleached Pulp Mill Effluent Treatment Systems

Chloroform concentrations in ambient air were measured upwind and downwind of treatment systems at four bleached kraft mills. Concentrations in the effluent entering, leaving and at various points within the treatment systems were also measured. Effluent treatment system components studied included primary clarifiers, quiescent basins, aerated basins, and activated sludge basins.