No person shall cause, suffer, allow or permit visible smoke to be emitted to be emitted into the outdoor air from combustion of fuel in any stationary indirect heat exchanger, except as provided in § 227-9 hereof.
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 opacity, 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 200,000,000 British thermal units or greater
gross heat input and discharging through a stack or chimney having all internal
cross-sectional dimensions of 60 inches or greater.
The provisions of this chapter shall not apply to direct heat exchangers
or manufacturing processes or 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.
