StacksVerified U.S. regulatory reference

40 CFR §60.31d

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Sulfuric acid production units. The emission guideline for designated facilities is 0.25 grams sulfuric acid mist (as measured by EPA Reference Method 8 of appendix A of this part) per kilogram (0.5 pounds per ton) of sulfuric acid produced, the production being expressed as 100 percent sulfuric acid.