The EPA published in the Federal Register the "Release of Final Control Techniques Guidelines for the Oil and Natural Gas Industry" on October 27, 2016 (81 FR 74798). These guidelines provided recommendations for reducing volatile organic compound emissions from existing oil and natural gas equipment and processes in moderate and higher classified ozone nonattainment areas and states in the Ozone Transport Region. In this action, the EPA plans to withdraw these guidelines in their entirety. On March 9, 2018, EPA proposed to withdraw the CTG in its entirety (83 FR 10478). In response to the substantive comments received, EPA is planning to release a supplemental notice of a potential withdrawal.