(a) Section 111.151 of this title (relating to Allowable Emissions Limits) shall not apply to any oil or gas fuel-fired steam generator with a heat input greater than 2,500 million British thermal units (Btu) per hour or any solid fossil fuel-fired steam generator.(b) No person may cause, suffer, allow, or permit emissions of particulate matter from any solid fossil fuel-fired steam generator to exceed 0.3 pound of total suspended particulate per million Btu heat input, averaged over a two-hour period.(c) No person may cause, suffer, allow, or permit emissions of particulate matter from any oil or gas fuel-fired steam generator with a heat input greater than 2,500 million Btu per hour to exceed 0.1 pound of total suspended particulate per million Btu input averaged over a two-hour period.