interp.txt
interp.txt — 1.4 KB
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Texas Air Control Board Austin Texas Interoffice To: Permit Engineers and Regional Supervisors From: Jim Myers, P.E. Date: April 23, 1980 Subject: Interpretation of the Standard Exemption List It is the purpose of the standard exemption list to define equipment and processes which when considered individually are insignificant sources of air contaminants. Combinations of such equipment or processes may constitute a significant source of air contaminants and thus not be entitled to an exemption. It is, therefore, requested that the following guidelines be used in the application of the list: 1. Combinations of equipment and processes should be considered collectively in determining the significance of the emissions. 2. If a combination of processes or equipment fits a standard exemption or a combination of standard exemptions and the emissions from the entire new facility do not exceed our 25 TPY guideline, construction pursuant to the standard exemptions is in order. 3. If, however, emissions from a combination of processes or equipment which would otherwise fit standard exemptions which will be located on a property will exceed the 25 tons per year guideline, a permit is required prior to construction of any one of the processes or equipment involved.