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On August 16, 2012, the EPA completed its residual risk and technology review (RTR) and promulgated amendments to National Emission Standards for Hazardous Air Pollutants (NESHAP) that regulate hazardous air pollutants (HAP) from new and existing stationary sources in the oil and natural gas production and transmission/storage major source categories. The 2012 rule amended the NESHAP for these two major source categories (40 CFR part 63, subparts HH and HHH) for the oil and natural gas industry which were promulgated in 1999. On October 15, 2012, the EPA received several petitions for reconsideration to reconsider, clarify and amend the residual risk review, the technology review and certain provisions of the final 2012 rule. By letter to petitioners dated October 6, 2017, the Administrator granted reconsideration on certain issues brought by petitioners. At this time, we are evaluating these issues to propose reconsideration. The letter may be found in the EPA Docket, ID No. EPA-HQ-OAR-2017-0747.