Section 326IAC1-2-74. "Stack" defined

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A vertical duct originating within the facility, the area and other physical parameters of which are quantifiable (including the quantity of pollutants emitted) and the use of which results in any immediate, physical pollutant plume whose characteristics continuously are determined by the operation of the facility. Any stack as defined herein with a horizontal discharge, or an elevated flare shall be considered to be a stack for the purpose of these rules (326 IAC). (Air Pollution Control Division; 326 IAC 1-2-74; filed Mar 10, 1988, 1:20 pm: 11 IR 2376)

                    
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