# Primary Lead Processing — EPA NESHAP Source Category Applicability Crosswalk For Primary Lead Processing, cfr subpart is 40 CFR 63 Subpart TTT; source type is major sources; epa category url is https://www.epa.gov/stationary-sources-air-pollution/primary-lead-processing-national-emission-standards-hazardous-air, recorded from its source on 2026-08-15. - **source category:** Primary Lead Processing _(verified: appears in the quote below)_ - **cfr subpart:** 40 CFR 63 Subpart TTT _(verified: appears in the quote below)_ - **source type:** major sources _(our reading, not quoted from the source)_ - **epa category url:** https://www.epa.gov/stationary-sources-air-pollution/primary-lead-processing-national-emission-standards-hazardous-air _(our reading, not quoted from the source)_ ## What the source says > Primary Lead Processing | 40 CFR 63 Subpart TTT ## Source - https://www.epa.gov/stationary-sources-air-pollution/national-emission-standards-hazardous-air-pollutants-neshap-8 Last verified: 2026-08-15. Review by: 2026-12-13. Part of [EPA NESHAP Source Category Applicability Crosswalk](https://referencesource.org/neshap-source-category-crosswalk/).