(a)

No person shall operate or cause to be operated, maintain or cause to be maintained any process for any purpose, or furnace or combustion device for the burning of coal or other natural or synthetic fuels, without maintaining and operating, while using the process or furnace or combustion device, recognized and approved equipment, means, method, device, or contrivance to reduce the quantity of gasborne or airborne solids or fumes emitted into the open air, which is operated in conjunction with the process, furnace or combustion device, so that the quantity of gasborne or airborne solids shall not exceed 0.20 grains per cubic foot of the carrying medium at a temperature of 500 degrees Fahrenheit.

(b)

For the purpose of determining the adequacy of such devices, these conditions are to be conformed to when the percentage of excess air in the stack does not exceed 50 percent at full load. The foregoing requirement shall be measured by the A.S.M.E. Test Code for dust-separating apparatus. All other forms of dust, dirt and fly ash shall be completely eliminated insofar as escape or emission into the open air is concerned. The building inspector may require such additional data as is deemed necessary to show that adequate and approved provisions for the prevention and elimination of dust, dirt and fly ash have been made.

(Code 1979, § 17.30.030)