EPA Superfund Site

WILCOX OIL COMPANY

OK | EPA ID OK0001010917

About this site’s exposure pathways: As of August 2024, the Wilcox Oil Company Superfund site is considered "human exposure not under control". All site planned field activities to collect sufficient information to make a human exposure evaluation are complete. The remedial investigation and the human health and ecological risk assessments are complete; however, ground water data gaps were identified. The Soil Feasibility Study was completed in 2021; however, further investigation of the ground water is needed in order to fully evaluate potential response actions.

Properties of concerned residents were sampled in May/June 2015. Soil data from the residential areas was reviewed to assess the potential for immediate human health risks. All results and concerns were discussed with the residents in October 2015. At this time, no immediate health risks were identified. In addition, properties where refinery waste is present at the surface are fenced and locked to deter trespassing and potential contact with the refinery waste.

In September 2018, a Source Control Interim and Early Action Record of Decision was issued to address the lead additive area and 8 waste source areas. The remedial design was completed in September 2019 and remedial action was funded in 2020; however, due to travel restrictions related to Covid-19 remediation was not completed in 2021. The Source control Interim and Early Action was completed in May 2023; however, this is only an interim/early action and only addresses exposures related to the 9 identified source areas and does not address all areas that need to be cleaned up.