§ 62-2254. Smoke.

(a)

Method of measurement. The Ringelmann smoke chart published by the United States Bureau of Mines Information Circular 333, or any subsequent revision or amendment thereto, shall be used for the measurement of smoke. The following are the steps that shall be used in the measurement of smoke:

(1)

Observations shall be made from a position which is at a right angle to the line of travel of emitted material.

(2)

The plume shall be observed against a suitable background.

(3)

Observations during daylight hours shall be made with the observer generally facing away from the sun.

(4)

Observations during hours of darkness shall be made with the aid of a light source.

(5)

Readings shall be noted at approximately 15-second intervals during observation, except that intervals of up to one minute shall be permitted where the appearance of the emission does not vary during such intervals.

(6)

The general color of the emission during the period of observation shall be noted as part of the record of observation.

(b)

Performance requirements. No person shall discharge into the atmosphere, from any single source of emission whatsoever, any air contamination, for a period or periods aggregating more than three minutes in any one hour, which is as dark or darker in shade than that designated as no. 2 on the Ringelmann chart, or of such opacity, excluding water vapor, as to obscure an observer's view to a degree equal to or greater than does smoke as described in this subsection.

(c)

Control plan. Detailed plans for the elimination of smoke may be required before the issuance of a building permit.

(Code 1979, § 14-20.42(D)(2); Ord. No. 2000-07, § 7, 1-25-00)