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Imperial Refining Company
Ardmore, Oklahoma

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Printable Version (PDF) (1 pg, 44K)

Site Description

The Imperial Refining Company site, located in Ardmore, Carter County, OK, is an inactive and abandoned crude oil refinery, which operated from 1917 to 1934. The site covers approximately 72 acres. The primary sources of contaminants are waste in an underground storage tank and waste piles characterized as dry, asphalt-like material. The contamination at the site includes waste material as well as soil and sediment contaminated with arsenic and benzo(a)pyrene.

Current Site Status and Cleanup Actions to Date

  • EPA selected a final cleanup plan in 2007 that calls for excavation and off-site disposal of contaminated waste, sediment and soil.
  • EPA started long-term cleanup activities in February 2008. By September 2008, a total of 105,993 cubic yards/107,299.88 tons of material had been excavated and shipped off-site for disposal. In addition, a total of approximately 64,366.5 cubic yards of backfill were imported for slope stabilization, grading, and vegetation.
  • On September 18, 2008, EPA completed construction at the site.

Current Funding Status

  • In Fiscal Year 2008, EPA obligated approximately $6 million for final cleanup activities including excavation and off-site disposal of waste. This funding represents the total amount obligated by EPA to date for this site.

For more information on this site, please read the Imperial Refining Company site fact sheet (PDF) (2 pp, 23K, http://www.epa.gov/region6/6sf/pdffiles/0605091.pdf) on the Region 6 Superfund web site.

Key Accomplishments

  • Implemented a time-critical short-term cleanup action from 2003-2005 to stabilize the tailing dam to avoid a potentially catastrophic release of tailing into the West Branch of the Ompompanoosuc River
  • Selected the long-term cleanup plan for the site in 2006
  • Implemented cleanup actions as part of the non-time critical action from 2006 to 2008


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