The U.S. Environmental Protection Agency (EPA) is providing notice that it has responded to a petition for reconsideration of a final rule published in the Federal Register on February 4, 2020. The rule promulgated amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP): Petroleum Refinery Sector based on the residual risk and technology review (RTR) conducted for the Petroleum Refinery source category. On April 6, 2020, the EPA received a petition for reconsideration on five issues related to the February 4, 2020, final rule. On September 3, 2020, the Administrator notified the petitioner by letter that the EPA was denying reconsideration. The basis for the denial is set out fully in the letter sent to the petitioner, and this letter is available in the rulemaking docket.