Boilers, heaters, drying or curing ovens, furnaces, or other combustion
units, but not including stationary internal combustion engines or turbines
are permitted by rule, provided that the following conditions are met.
(1) The only emissions shall be products of combustion of the
(2) The maximum heat input shall be 40 million British
thermal unit (Btu) per hour with the fuel being:
(A) sweet natural gas;
(B) liquid petroleum gas;
(C) fuel gas containing no more than 0.1 grain of total sulfur
compounds, calculated as sulfur, per dry standard cubic foot; or
(D) combinations of the fuels in subparagraphs (A) - (C) of
(3) Distillate fuel oil shall be fired as a backup
fuel only. Firing shall be limited to 720 hours per year. The fuel oil shall
contain less than 0.3% sulfur by weight and shall not be blended with waste
oils or solvents.
(4) All gas fired heaters and boilers with a heat input
greater than ten million Btu per hour (higher heating value) shall be designed
such that the emissions of nitrogen oxides shall not exceed 0.1 pounds per
million Btu heat input.
(5) Records of hours of fuel oil firing and fuel oil purchases
shall be maintained on-site on a two-year rolling retention period and made
available upon request to the commission or any local air pollution control
agency having jurisdiction.