Aerial Deposition of Dioxins and Furans from a Dissoling Sulfite Pulp Mill in Southeast Alaska

摘要

As part of the 1997 shutdown of the Ketchikan Pulp Company mill in southeast Alaska, we evaluated past aerial deposition of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans asssociated with emisisons from the mill's multifuel power boilers. Mazimum offsite deposition was predicted by mideling to be less than 10 mumg/m sup 2 of 2, 3, 7, 8-TCDD toxic equivalent concentration over the 43-year life of the mill. The predicted deposition was consistent with the PCDD/F mass in the surface soils that was estimated from measured soil concentrations.