Section 326IAC1-2-88. "Vapor balance system" defined  


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  •    A combination of pipes and/or hoses which creates a closed system between the vapor spaces of an unloading tank and a receiving tank such that vapors displaced from the receiving tank are transferred to the tank being unloaded. (Air Pollution Control Division; 326 IAC 1-2-88; filed Mar 10, 1988, 1:20 pm: 11 IR 2377)