Boilers and process heaters emit air contaminants including oxides of nitrogen, carbon monoxide, volatile organic compounds, oxides of sulfur, particulate matter and toxic air contaminants. All boilers and process heaters with a maximum heat input equal to or greater than 5 million Btu per hour (MMBtu/hr) require a permit to operate from the District. In addition, units capable of being fired on liquid fuel with a maximum heat input rating equal to or greater than 1 MMBtu/hr require a permit to operate.
Boilers can operate on a variety of fuels including natural gas, propane or fuel oil. Boilers can be used to produce hot water or steam. Process heaters are used to heat a working fluid other than water where flue gas does not come into contact with the working fluid. Common techniques for controlling emissions include the use of low NOx burners, flue gas recirculation, other combustion modifications, or exhast aftertreatment with a process such as selective catalytic reduction (SCR).
The information on this page will assist in the completion and submittal of an application for each boiler and process heater. Each section of the page contains important information needed to submit an application.