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ExxonMobil Pipeline Company Spill, Mayflower, Arkansas


EPA supported the response to the ExxonMobil Pegasus pipeline oil spill that occurred on March 29, 2013, in Mayflower, Arkansas. The spill forced the evacuation of homes and impacted tributaries of Lake Conway.

Soon after the spill occurred, EPA sent samples of the spilled oil to the US Coast Guard and a private lab for chemical analysis. Those results were used to ensure effective cleanup techniques were used and that EPA’s air monitoring and sampling program was appropriate. The results also supported information regarding the oil that ExxonMobil supplied to responders during the first stages of the emergency response.

Since the pipeline carries oil from Canada, EPA also asked Environment Canada to analyze the samples. Their tests conclude that the spilled oil was Wabasca heavy bitumen with the addition of light diluents or refined petroleum product, which form diluted bitumen (dilbit) oil.

The EPA provided a Federal On-Scene Coordinator and worked closely with state and local officials, as well as the Responsible Party, as they responded to this incident. EPA was supported by the Department of Transportation’s Pipeline and Hazardous Materials Safety Administration, as well as the US Fish and Wildlife Service.

Response updates from Unified Command

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