FACT SHEET National Emission Standards for Hazardous Air Pollutants: Municipal Solid Waste Landfills Residual Risk and Technology Review; Correction ACTION • On January 14, 2022, the US. Environmental Protection Agency (EPA) finalized technical revisions and clarifications for the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Municipal Solid Waste (MSW) Landfills established in the March 26, 2020, final rule. • In this action, EPA is finalizing technical revisions and clarifications for the NESHAP for MSW Landfills established in the March 26, 2020, final rule. These changes correct inadvertent errors and clarify: o Wellhead monitoring requirements for the purpose of identifying excess air infiltration; o Delegation of authority to state, local or tribal agencies for "emission standards"; o Applicability of the General Provisions to affected MSW landfills; and o Handling of monitoring data for combustion devices during periods of monitoring system breakdowns, repairs, calibration checks and adjustments. • EPA is finalizing further amendments to the MSW Landfills New Source Performance Standards (NSPS) at 40 CFR part 60, subpart XXX, to clarify the timing of compliance for certain requirements of the MSW Landfills NSPS for existing MSW landfills that have modified but previously triggered the requirement to install a gas collection and control system under related MSW landfill rules. • Additionally, EPA is revising the definition of Administrator in the MSW Landfills Federal Plan that was promulgated on May 21, 2021. The revision makes the definition consistent with other Federal plans such as the Federal Plan Requirements for Sewage Sludge Incineration Units (40 CFR part 62, subpart LLL), which distinguishes between the administrator of the federal plan and the administrator of a state plan. BACKGROUND • On March 26, 2020, EPA issued a final rule for the residual risk and technology review (RTR) of the NESHAP for MSW Landfills. The Landfills NESHAP, subpart AAAA, was promulgated pursuant to section 112(d) of the Clean Air Act in January 2003. • On October 13, 2020, EPA corrected inadvertent errors in the cross-referencing and formatting in the Federal Register; as well as clarifies two operational and reporting requirements in the March 26, 2020, final rule. 1 ------- FOR MORE INFORMATION • The fact sheet and a copy of the final corrections are available on EPA's website at https://www.epa.gov/stationarv-sources-air-pollution/municipal-solid-waste-landfills- national-emission-standards. • For additional technical information about MSW landfills, contact Andy Sheppard, EPA's Office of Air Quality Planning and Standards, at (919) 541-4161 or sheppard.andy@epa.gov. 2 ------- |