Air Plan Approval; Indiana; Indiana RACT SIP and Negative Declaration for the Oil and Natural Gas Industry Control Techniques Guidelines

The Environmental Protection Agency (EPA) is approving a "Negative Declaration" for the State of Indiana regarding the Control Techniques Guideline (CTG) for the Oil and Gas Industry issued by EPA on October 20, 2016. Indiana has evaluated areas for which the Oil and Natural Gas Industry CTG must be applied under the 2008 ozone National Ambient Air Quality Standard (NAAQS). These areas include Lake and Porter counties, which are part of the Chicago-Naperville, IL-IN-WI Moderate nonattainment area for the 2008 ozone NAAQS. Therefore, reasonably available control technology (RACT) requirements would be applicable for sources covered by the Oil and Natural Gas Industry CTG in Lake and Porter counties. The Indiana Department of Environmental Management (IDEM) did not find any covered sources in Lake and Porter counties. Approval of this Negative Declaration supports EPA's February 13, 2019 approval of Indiana's volatile organic compounds (VOC) RACT Certification for Lake and Porter Counties. EPA proposed to approve this "Negative Declaration" on June 26, 2019 and received one set of comments.