Superfund Site: SMURFIT-STONE MILL FRENCHTOWN, MISSOULA, MT
Superfund Site Profile
The 3,200-acre Smurfit-Stone Mill site is located 11 miles northwest of Missoula, Montana. A pulp mill operated on site from 1957 to 2010. The core industrial footprint of the mill site covers about 100 acres. Over 900 acres of the site consist of a series of unlined ponds used to store treated and untreated wastewater effluent from the mill, as well as primary sludge recovered from untreated wastewater. Some ponds initially used to store wastewater were subsequently drained and used for the landfilling of solid wastes from the mill.
Various hazardous substances were used or produced on site, including bleaching chemicals. The use of chlorine for the bleaching of pulp produces chlorinated organic compounds, including dioxins and furans, through the reaction of chlorine with residual lignin. The site includes landfills used to dispose of solid wastes including general mill refuse, boiler fly ash, lime kiln grits, ragger wire and asbestos.
Site activities and waste disposal practices on site may have caused a release of hazardous substances into the environment. A screening investigation by EPA determined that the site’s primary contamination sources include four sludge ponds, an emergency spill pond, an exposed soil pile adjacent to a landfill, a wastewater storage pond and a soil land farming area.
TOPICS IN FOCUS
Investigation of the Smurfit-Stone Mill site to determine the nature and extent of contamination is ongoing. Several additional documents related to the remedial investigation of the site are available:
- Monthly Remedial Investigation Progress Reports by NewFields [Exit] as of January 2017.
- 2017 Addendum # 3 to the Remedial Investigation Work Plan for Deep Groundwater Sampling (23 pp, 2.98 MB, About PDF) is for the installation of three additional deep aquifer groundwater wells on site.
- June 2016 Shallow Groundwater Data Summary Report (2,790 pp, 53.93 MB, About PDF) reports data from groundwater monitoring activities that occurred in 2016; it includes responses to comments received for the report.
- March 2016 Aerial Survey, High-Resolution Aerial Imagery, and Topographic Data technical memo (11pp, 3.56 MB, About PDF) presents topographic information and aerial imagery obtained and processed by NewFields during a March 2016 aerial survey of the site.
- 2016 PCB Soils Investigation Report (102 pp, 9.94 MB, About PDF) presents findings of PCB soils investigation in Operable Unit 2 (the core industrial footprint of the mill) at the site.