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This action will finalize the agency’s technology review of the National Emission Standards for Hazardous Air Pollutants (NESHAP) for two Gasoline Distribution rules. The Gasoline Distribution NESHAP, subparts R and BBBBBB, were promulgated pursuant to section 112(d) of the Clean Air Act(CAA) on December 14, 1994, and January 10, 2008, respectively. The NESHAP established emission limitations and other associated requirements based on maximum achievable control technology (MACT) for controlling emissions of hazardous air pollutants (HAP) from major sources and using generally available control technologies or management practices for controlling HAP emissions from area sources. The HAP emitted in gasoline vapors from storage tanks, loading racks, cargo tank vapor leaks and equipment leaks include: benzene, ethylbenzene, hexane, toluene, xylenes, isooctane, naphthalene, cumene and methyl tert-butyl ether. This action will implement the technology review requirements of CAA section 112(d)(6). CAA section 112(d)(6) requires the EPA to review and revise the MACT standards as necessary, taking into account developments in practices, processes and control technologies, no less often than every 8 years. In addition, this action will finalize the agency’s review of the New Source Performance Standards (NSPS) for Bulk Gasoline Terminals. The Bulk Gasoline Terminals NSPS, subpart XX, was originally promulgated pursuant to section 111(b) of the CAA on August 18, 1983. The NSPS established standards of performance in the form of emission limitations and other associated requirements based on the EPA’s determination of the best system of emission reductions (BSER), as defined in CAA section 111(a)(1). This NSPS regulates volatile organic compounds in gasoline vapors emitted from cargo tank loading and unloading operations. This action will implement the review requirements of CAA section 111(b)(1)(B). CAA section 111(b)(1)(B) requires the EPA to review, and if appropriate, revise the standards of performance under CAA section 111(b) no less often than every 8 years. The EPA proposed to revise NESHAP requirements for storage tanks, loading operations, and equipment leaks to reflect cost-effective developments in practices, process, or controls. The EPA also proposed New Source Performance Standards to reflect best system of emissions reduction for loading operations and equipment leaks. In addition, the EPA proposed revisions related to emissions during periods of startup, shutdown, and malfunction; requirements for electronic reporting of performance test results, performance evaluation reports, and compliance reports; monitoring and operating requirements for control devices; and other minor technical improvements.