(a) No person may cause, suffer, allow, or permit emissions of sulfur dioxide (SO2) from any sulfuric acid plant burning elemental sulfur to exceed the emission limits specified by the equation:Attached Graphic(b) If a source has an effective stack height less than the standard effective stack height determined by the equation:Attached Graphic(c) Beginning September 30, 1994, sulfuric acid plants of greater than 300 tons per day production capacity, with production being expressed as 100% acid, and to which this section applies, shall be equipped with a continuous emissions monitoring system (CEMS) for SO 2. The CEMS shall be installed, calibrated, and operated as specified in 40 Code of Federal Regulations Part 51, Appendix P, hereby incorporated by reference.