By a letter dated April 18, 2017, the Administrator announced the convening of a proceeding for reconsideration of the fugitive emission requirements at well sites and compressor station sites in the final rule, "Oil and Natural Gas Sector: Emission Standards for New, Reconstructed, and Modified Sources," published in the Federal Register on June 3, 2016. In this action, the Environmental Protection Agency (EPA) is granting reconsideration of additional requirements in that rule, specifically the well site pneumatic pumps standards and the requirements for certification by professional engineer. In addition, the EPA is staying for three months these rule requirements pending reconsideration.