"Theoretical potential VOC emissions (TPEs)” means the emissions of VOCs that would have occurred prior to the application of add-on controls required by a federally enforceable rule or document issued prior to January 1, 1990, based on one of the following:

1. (a) Continuous operation of 8760 hours per year under maximum production capacity, which for coating and graphic arts sources includes coatings and inks with the highest VOC content used in practice by the source during 1993 and 1994 or the 2-year period most representative of normal production rates; or
2. (b) Hours of operation, process conditions, or both that are limited by federally enforceable permit conditions.

Source. (See Revision Note at chapter heading for Env-A 1200) #9933, eff 6-1-11; ss by #12899, eff 10-17-19