§ 44-195. Performance requirements for all uses.

Uses in all districts of the city shall comply with the standards of performance set forth in this article; generally accepted methods of collection and standard methods of chemical analysis shall be used in the application of those standards.

(1)

Air contaminants. Air contaminants as measured not less than 100 feet and not more than one-quarter mile from stack or source. Air contaminants less dark in shade than that designated as No. 2 on the Ringelmann Chart, as published by the U.S. Bureau of Mines, are permitted except that No. 2 is permitted for one four minute period in each one-half hour. Air contaminants of such opacity as to obscure observer's view to a degree equal to or greater than described in this section shall not be permitted except that essentially water vapor effluents in the range of white or cream may be excepted from this rule.

(2)

Particulate matter and dust. Particulate matter and dust as measured at a convenient measuring point nearest to stack outlet or source. Particulate matter or dust as measured at and by any generally accepted manner shall not be emitted in excess of three-tenths grain per cubic foot of flue gas at a stack temperature of 500 degrees Fahrenheit not exceeding 50 percent excess air, except for periods of four minutes in any one-half hour, when it can equal but not exceed five-tenths grains per cubic foot of flue gas at a temperature of 500 degrees Fahrenheit not exceeding 50 percent excess air.

(3)

Odor. The emission of odors which are generally agreed to be obnoxious to any considerable number of persons, at their place of residence, shall be prohibited.

(4)

Gases as measured at the property line . Sulfur dioxide gas shall not exceed an average of three-tenths parts per million over a 24 hour period, provided, however, a maximum concentration of five-tenths part per million will be allowed for a one hour period out of a 24 hour period; hydrogen sulfide shall not exceed one-tenth part per million; fluorine shall not exceed one-tenth part per million; nitrous fumes shall not exceed five parts per million; carbon monoxide shall not exceed 15 parts per million.

(Code 1969, § 5.85; Code 1977, § 28-133)