Petroleum Tank Cleanup | MDOT Swan Lake Site | Swan Lake

The Department of Environmental Quality (DEQ) has approved clean-up activities for the petroleum release at MDOT Swan Lake Site. The clean-up activities are required by DEQ under the authority of 75-5-501 through 75-11-526, Montana Code Annotated (MCA) and Administrative Rules of Montana (ARM) 17.56.606. The DEQ Petroleum Tank Cleanup Section requested, reviewed, and approved the Corrective Action Plan (CAP) prepared and submitted by Olympus Technical Services on behalf of the owner/operator of the facility listed below. Copies of the CAP are available upon request by contacting the Petroleum Tank Cleanup Section at the DEQ Remediation Division by emailing Thomas Dodge at Thomas.Dodge2@mt.gov. 

FACILITY INFORMATION   

Facility Name:                        MDOT Swan Lake Site

Facility Location:                    24526 Highway 83, Swan Lake, Lake County

Facility ID:                                24-08739

Release Number:                    6494

Work Plan ID Number:           35076 

The work to be conducted under the above-described CAP will include excavation of petroleum contaminated soil, addition of oxygen enhancement amendment, backfill and compaction, and monitoring well replacement, during Fall 2025. The work will involve the use of an excavator, hauling vehicles, drill rig and related vehicles. Area residents and visitors can expect to see soil removed and temporarily stockpiled. Contaminated soil will be removed for treatment and soil suitable for reuse will be used as backfill. Trucks will be entering the Highway during excavation and hauling.

WMRD 483045

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Tags: Cleanup and Public Notice