We are issuing national emission standards for control of hazardous air pollutants (HAP) for the plating and polishing area source category. This final rule establishes emission standards in the form of management practices for new and existing tanks, thermal spraying equipment, and mechanical polishing equipment in certain plating and polishing processes. These final emission standards reflect EPA's determination regarding the generally achievable control technology (GACT) and/or management practices for the area source category.