Appendices 1-3.pdf

Hexavalent Chromium Airborne Toxic Control Measure - Decorative and Hard Chrome Plating and Chromic Acid Anodizing Facilities. Definitions include:
- Ampere-hours: integral of electrical power applied to a plating tank over time
- Anti-mist additive: chemical reducing emission rate when added to plating tank
- Chrome: metal chrome
- Chrome plating: hard or decorative chrome plating
- Chromic acid: aqueous solution of chromium trioxide
- Chromic acid anodizing: electrochemical process converting metal surface to oxide surface coating
- Chromium: hexavalent chromium
- Control equipment: device reducing emissions from emissions collection system
- Decorative chrome plating: process electrodepositing chromium onto object resulting in chrome layer 1 micron or less thick
- Emission factor: mass of chromium emitted during testing
- Emissions collection system: device collecting emissions from chrome plating or chromic acid anodizing tanks
- Facility: business engaged in chrome plating or chromic acid anodizing
- Total emissions: total emissions from hard chrome plating or chromic acid anodizing at facility over calendar year
Requirements include:
- Decorative chrome plating facilities: maintain anti-mist additive or control equipment reducing chromium emissions by 95%
- Hard chrome plating and chromic acid anodizing facilities: maintain record of ampere-hours for all plating tanks and collection systems.