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On August 28, 2019, EPA issued a proposed rule titled Oil and Natural Gas Sector: Emission Standards for New, Reconstructed, and Modified Sources Review (the “Proposed Rule”). The Proposed Rule, if adopted, would rescind certain parts of the New Source Performance Standards (“NSPS”) related to methane and volatile organic compounds (“VOCs”) in the oil and gas industry.
First, EPA is proposing to redefine the operations included in the NSPS source category for the oil and gas industry. The original source category listing for the oil and gas industry, issued in 1979, included the production and processing segments of the industry. In 2012 and 2016, EPA expanded the oil and gas industry source category to include the transmission and storage segment of that industry. The Proposed Rule would remove sources in the transmission and storage segment from the oil and natural gas source category and would rescind the methane and VOC emission limits, adopted in 2012 and 2016, which currently apply to those sources.
Second, EPA is proposing to rescind emissions limits for methane (but keep limits for VOCs) in the production and processing segments of the oil and gas industry.
Third, EPA is seeking comment on its legal authority to regulate methane under section 111 of the Clean Air Act (“CAA”). In 2016, EPA determined that it could regulate methane and other greenhouse gases (“GHGs”) under section 111 of the CAA without making a pollutant-specific determination that GHG emissions from the oil and gas industry cause or contribute to air pollution that endangers public health. In the alternative, in case such a determination was required, EPA found that methane and other GHG emissions from the oil and gas industry do cause or contribute to air pollution that endangers public health.
Specifically, EPA is requesting comment on the following three questions:
According to EPA’s analysis, the Proposed Rules would result in an increase in emissions of methane, VOCs, and hazardous air pollutants (“HAPs”). The estimated increases would be 370,000 short tons of methane (8.4 million metric tons of carbon dioxide equivalent), 10,000 short tons of VOCs, and 300 short tons of HAPs. The Proposed Rule would save the oil and gas industry a total of $97-$123 million from 2019 through 2025, which is $17-$19 million a year.
More information about the Proposed Rule is available at EPA’s website. EPA will be accepting comments on the Proposed Rule for 60 days after it is published in the Federal Register.