Department of Natural Resources: Assisting with Enbridge Line 5 Oil Spill Investigation near Ashland

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MADISON, Wis. – The Wisconsin Department of Natural Resources (DNR) is participating in an investigation of suspected contaminated soil along Enbridge Line 5 south of Ashland.

On the evening of August 3, Enbridge reported to MNR that a contractor had encountered suspected contaminated soil near Old Airport Road and Holmes Road, approximately 1 mile west of the Bad River strip of the Chippewa Lake Superior Reserve. Enbridge told MNR staff that they believed the contamination was from a historical release and not an ongoing release.

Enbridge excavated and stockpiled all suspect materials. MNR personnel visited the site several times and did not observe any petroleum odors or additional soil stains. Enbridge will be required to submit to MNR documentation of the actions taken to remediate the suspected contamination as well as documentation of the volume of soil that has been excavated and where it has been legally disposed.

Enbridge said it found no indication of leaks during the pipeline shutdown. They also said they had slowly increased the pressure in an attempt to identify a leak and are currently at full pressure with no signs of a leak or alarm.

The investigation is ongoing. No further details are available at this time. The DNR will share additional information online as it becomes available through the DNR Office for Remediation and Redevelopment Tracking System (BRRTS).

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