(A) For enclosed industrial use the emission of more than 70 smoke units per hour per stack and emissions in excess of Ringelmann No. 2 are prohibited, except that for one hour during any 24-hour period, this rate may be increased to 80 smoke units per stack up to and including Ringelmann No. 3 for purging, soot blowing, and fire cleaning. For open industrial use the emission of more than 90 smoke units per hour per stack and emission in excess of Ringelmann No. 3 are prohibited, except that for one hour period during the 24 this rate may be increased to 120 smoke units per hour per stack, still at Ringelmann No. 3, for purposes of process purging, soot blowing, and fire cleaning.
(B) The emission of toxic or injurious fumes and gases shall be controlled so as to comply with the following:
(1) The emission from any source shall not cause at or beyond any lot line, concentrations of toxic or injurious fumes and gases in excess of 10% for an enclosed industrial use, and 25% for an open industrial use, of the threshold limit as set for the fume or gas in question in the "Threshold Limit Values for Toxic Materials in Industry" issued by the Indiana State Board of Health, from the American Conference of Governmental Hygienists, latest issue.
(2) The emission of any gas or fumes across lot lines in concentrations that are detrimental to or endanger public health, safety, comfort, and welfare or shall cause injury or damage to property or business is prohibited.
(C) The rate of emission of particulate matter from an individual process within the boundaries of any lot shall not exceed a figure of 0.06 pounds per 1,000 pounds of effluent gas for enclosed industrial use, nor 0.2 pounds per 1,000 pounds of effluent gas for open industrial use. For enclosed industrial use and open industrial use not more than 50% by weight of particles larger than 44 microns (325) mesh shall be allowed.
(Ord. CO-67-2, passed 2-21-67) Penalty, see § 155.999