Rule 1121. A permittee of a well shall ensure that heated vessels fueled with natural gas that contains hydrogen sulfide are equipped with a system to prevent the emission of the fuel gas to the atmosphere in the event of a pilot failure or flameout and shall be in compliance with the emissions and operations requirements provided in R 336.1403. The exhaust gas stack height shall be not less than 20 feet.
Mich. Admin. Code R. 324.1121