Since 1957 Smurfit-Stone Container mill manufactured rolls of liner-board (the material used to cover corrugated cardboard). This site was developed on irrigated floodplain. It covers approximately 3,200 acres and is located approximately 11 miles downstream from Missoula on the Clark Fork River. During the height of production, this mill discharged 15 million gallons of wastewater into unlined cells that directly discharge contaminated water into soil and groundwater. At certain times, wastewater was discharged from large pipes directly into the channel. Contaminants in the wastewater and landfills include dioxins, furans and pcbs. This material has been found in fish downstream of the mill and has prompted Montana Fish, Wildlife and Parks to issue a fish consumption advisory. This site is currently up for consideration as a federal superfund site with cleanup overseen by the Montana Department of Environmental Quality. 

EPA has proposed listing the former Smurfit-Stone Frenchtown Mill on the National Priorities List under the Superfund Program. This proposal followed completion of a preliminary assessment of the site and consultation with state, tribal and local officials.

• October 2022 - Abt Associates Memorandum - Recommendations for additional sampling
• February 2018 OU 2 & OU 3 - Draft Human Health Risk Assessment Presentation
• October 2017  Missoula Valley Water Quality District Comments on Addendum 7 - Soil Sampling in OU2 and OU3
• October 2017 Missoula Valley Water Quality District Comments on Addendum 6 -  Remedial Investigation Workplan
• October 2017 Memo from River Design Group, Inc on Addendum 6 Draft
• September 2017 Missoula Valley Water Quality District Comments on Addendum 5 - PCB Removal 
• August 2017 Missoula Valley Water Quality District Comments on 2017 GW Monitoring Plan 
• July 2017 Groundwater Monitoring Plan (Addendum 4 to the Remedial Investigation Work Plan)
• July 2017 Missoula Valley Water Quality District Letter to EPA & DEQ regarding PCBs
• EPA Region 4 technical guidance for PCB characterization at Superfund and RCRA sites
• October 2016 Missoula County Board of Commissions Letter to EPA & DEQ
• October 2016 Missoula Valley Water Quality District letter to EPA & DEQ
• July 2016 Missoula Valley Water Quality District letter to EPA & DEQ
• January 2016 Memo to EPA re: Smurfit Site groundwater investigation

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