| (a) No person may cause, suffer, allow, or permit emissions of sulfuric acid from a source or sources operated on a property or multiple sources operated on contiguous properties to exceed: (1) a net ground level concentration of 15 ug per cubic meter of air averaged over any 24-hour period; (2) a net ground level concentration of 50 ug per cubic meter of air averaged over a one-hour period of time more than once during any consecutive 24-hour period; or (3) one hundred ug per cubic meter of air maximum at any time. (b) No person may cause, suffer, allow, or permit emissions of sulfuric acid mist from any sulfuric acid or oleum facility that burns elemental sulfur, alkylation acid, hydrogen sulfide, organic sulfides, mercaptans, or acid sludge by the contact process to exceed 0.50 pound per ton (0.25 gram per kilogram) of 100% sulfuric acid produced. (1) Sulfuric acid mist
emissions affected by this subsection shall be expressed as sulfuric acid and shall include liquid mist, sulfur trioxide, and sulfuric acid vapor as measured by Test Method 8 (40 Code of Federal Regulations 60, Appendix A) or an equivalent measurement method which has been approved by the executive director. (2) Sulfuric acid plants or facilities used exclusively as sulfur dioxide control systems, chamber process plants, acid concentrators, or oleum storage and transfer facilities are exempt from this section.
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