No person shall cause, suffer, allow or permit visible smoke to be emitted into the outdoor air from combustion of fuel in any stationary indirect heat exchanger except as provided in § 105-7 of this chapter.
No person shall cause, suffer, allow or permit smoke, the shade or appearance
of which is darker than No. 1 on the Ringelmann smoke chart, or greater than
twenty-percent capacity, exclusive of water vapor, to be emitted into the
outdoor air from the combustion of fuel in any stationary indirect heat exchanger
having a rated hourly capacity of two hundred million (200,000,000) BTU or
greater gross heat input and discharging through a stack or chimney having
all internal cross-sectional dimensions of sixty (60) inches or greater.
The provisions of this Article shall not apply to direct heat exchangers
or manufacturing processes or to any motor vehicle while operating on the
public highways.
Any person responsible for the construction, installation, alteration
or use of an indirect heat exchanger shall, when requested by the Director,
provide the facilities and necessary equipment for determining the density
or opacity of smoke being discharged into the open air.
