The U.S. Environmental Protection Agency is proposing a prospective purchaser settlement agreement with Scout DAC LLC (the purchaser) and requests comment on the proposed agreement. This agreement outlines what work the purchaser plans to perform onsite and what liability protections EPA and the Montana Department of Environmental Quality plan to provide. The project is expected to enhance the protectiveness of the remedy during development and future use of the property.
Where can I read the proposed purchaser agreement?
Visit the EPA’s website:
Visit the regulation website:
How can I comment?
Online (follow instructions for submitting comments)
- Kayleen Castelli, ORC-L-C
1595 Wynkoop St
Denver, CO 80202
The Idaho Pole Company Superfund Site is near the northern limits of Bozeman. Contaminants include pentachlorophenol (PCP), polyaromatic hydrocarbons (PAHs) and dioxin. For information about the site, please visit: https://www.epa.gov/superfund/idaho-pole. Please don’t hesitate to reach out with any questions.
Idaho Pole Redevelopment is on the Horizon
The City of Bozeman created a TIF financing district for the redevelopment of this area on Nov 24, 2020. The city's vision embraces dense urban mixed use development. Is this property safe to develop? Is it appropriate for the kind of density the city envisions?
What vision do you have for this area? Please get involved to help shape the redevelopment of this area!
EPA is sponsoring a series of meetings to address the safety issues, details below for upcoming and past meetings.
Idaho Pole notes from February 17, 2021 public meeting
The February 17 meeting notes are now available on the EPA’s website. Click here to download the notes directly.
Idaho Pole 5 Year Review - notes from January 27, 2021 EPA public meeting
Five Year Review
- Waste is left in-place at the site; therefore, a Five-Year Review is required by EPA, in consultation with
DEQ. The review is a regular checkup to ensure the cleanup decisions continue to protect human health
and the environment.
- September 2020 the Fifth Five-Year Review was issued and is available on the EPA website at:
o Attachments to the Fifth Five-Year Review are available here:
- This Five-Year Review determined that sediment, soil and groundwater remedies currently protect
human health and the environment.
- In order to be protective long term, the following actions were identified:
1. Revise the operation and maintenance plan with a formal schedule for groundwater inspection,
especially with prospect of redevelopment. The former operations and maintenance plan is
based on the pump and treat system and may need other revisions.
2. Install and sample additional wells in the downgradient portion of the plume due to a
downgradient well having an exceedance. Samples over time at these wells will help us
determine if contamination is leaving the boundary of the Controlled Groundwater Area.
3. Complete the focused feasibility study and modify the remedy to address residual source area
Focused Feasibility Study
- The Superfund process includes an assessment and investigation and then it gets listed on the National Priorities List. EPA does a remediation investigation and feasibility study and then issues a Record of Decision (ROD). After the ROD, the EPA designs the remedy and completes remedial action. Once construction is complete, the site moves to post construction completion, that includes Five Year Reviews. The site can then be deleted, or partially deleted, off the National Priorities List and then can be considered for reuse. We are at the reuse point for soils and jumping back to the feasibility study section for groundwater.
- The Focused Feasibility Study evaluates remediation alternatives for groundwater at the site, including knowledge we already have from the ROD and old studies. The groundwater Focused Feasibility Study will consider residual soil contamination.
- The Pump and Treat System removed approximately 350 pounds of contaminants and treated 624 gallons of groundwater in total.
- In the last few years of the pump and treat system, the remedy was only removing a small amount of contamination so in 2010 EPA started evaluating other alternatives. The original remedy served its purpose to remove most contaminant mass.
- In 2014 and 2015 EPA began a groundwater pilot test by injecting microbes to consume the remaining contaminants (In-Situ Treatment)
- The Focused Feasibility Study is looking at three alternatives:
- No action
- In Situ Treatment (biological or chemical) and monitored natural attenuation with Institutional and Engineering Controls.
- This would inject chemicals to break down contaminants, or nutrients to allow microbial community to break down contaminants as referenced above in the test.
- Monitored Natural Attenuation and contingency In Situ Treatment with Institutional and Engineering Controls.
- This uses the natural process to decrease concentration in contaminations in soil and groundwater. This would include farming indigenous microbes to foster further contaminant breakdown.
EPA Superfund information, list of past events