Day 18
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
- Revisions to the Arizona State Implementation Plan, Arizona Department of Environmental Quality
- National Emission Standards for Hazardous Air Pollutants: Hydrochloric Acid Production [HTML] or [PDF]
AIR TEXT Files - [ZIP 45kb] - National Emission Standards for Hazardous Air Pollutants: Hydrochloric Acid Production [HTML] or [PDF]
![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif)