The existing Air Emissions Reporting Requirements (AERR) in 40 CFR part 51 include a reporting threshold of 5 tons per year for lead (Pb). This action will bring that threshold into line with the requirements of the revised Pb national standards (NAAQS) and its associated monitoring requirements of 0.5 tons per year. In this action, EPA will finalize technical corrections to Appendix A of subpart A of the AERR final rule to make it consistent with the final implementation of the Emission Inventory System (EIS), which is used to collect the data required as part of the AERR. The final rule would affect state, local, and tribal agencies that are responsible for submitting data to EIS by requiring them to collect and submit data from additional Pb sources based on the lower emissions reporting threshold. The final action would also help clarify for these data submitters the technical elements of their submissions to the EIS by reducing inconsistencies with other features of Appendix A.