(1)A source’s actual emissions as of the baseline period are the sum total of the actual emissions from each part of the source for each regulated pollutant. The actual emissions as of the baseline period will be determined to be:
(a)Except as provided in subsections (b) and (c) and section (2), the average rate at which the source actually emitted the regulated pollutant during normal source operations over an applicable baseline period;
(b)The source specific mass emissions limit included in a source’s permit that was effective on Sep. 8, 1981 if such emissions are within 10% of the actual emissions calculated under subsection (a); or
(c)The potential to emit of the source or part of a source as specified in paragraphs (A) and (B). The actual emissions will be reset if required in accordance with section (3).
(A)Any source or part of a source that had not begun normal operations during the applicable baseline period but was approved to construct and operate before or during the baseline period in accordance with OAR 340 division 210 or 216, or was not required to obtain approval to construct and operate before or during the applicable baseline period; or
(B)Any source or part of a source that will emit greenhouse gases that had not begun normal operations prior to Jan. 1, 2010, but was approved to construct and operate prior to Jan. 1, 2011 in accordance with OAR 340 division 210 or 216.
(2)For any source or part of a source or any modification of a source or part of a source that had not begun normal operations during the applicable baseline period, but was approved to construct and operate in accordance with OAR 340 division 210, 216 or 224, actual emissions of the source or part of the source equal the potential to emit of the source or part of the source on the date the source or part of the source was approved to construct and operate.
(3)For any source or part of a source whose actual emissions of greenhouse gases were determined pursuant to paragraph (1)(c)(B), and for all other sources of all other regulated pollutants that are permitted in accordance with the Major NSR rules in OAR 340 division 224 on or after May 1, 2011, the potential to emit of the source or part of the source will be reset to actual emissions as follows:
(a)Except as provided in subsection (b), ten years from the end of the applicable baseline period under paragraph (1)(c)(B) or ten years from the date the permit is issued under section (2), or an earlier time if requested by the source in a permit application involving public notice, DEQ will reset actual emissions of the source or part of the source to equal the highest actual emission rate during any consecutive 12-month period during the ten year period or any shorter period if requested by the source. Actual emissions are determined as follows:
(A)The owner or operator must select a consecutive 12-month period and the same 12-month period must be used for all affected regulated pollutants and all affected devices or emissions units; and
(B)The owner or operator must determine the actual emissions during that 12-month period for each device or emissions unit that was subject to Major NSR or Type A State NSR action under OAR 340 division 224, or for which the baseline emission rate is equal to the potential to emit.
(b)DEQ may extend the date of resetting by five additional years upon satisfactory demonstration by the source that construction is ongoing or normal operation has not yet been achieved.
(c)Any emission reductions achieved due to enforceable permit conditions based on OAR 340-226-0110 (Highest and Best Practicable Treatment and Control: Pollution Prevention) and 340-226-0120 (Highest and Best Practicable Treatment and Control: Operating and Maintenance Requirements) are not included in the reset calculation required in subsection (a).
(4)Regardless of the PSEL compliance requirements specified in a permit, actual emissions from a source or part of a source may be calculated for any given 12 consecutive month period using data that is considered valid and representative of the source’s or part of a source’s emissions. Actual emissions must be calculated using the unit’s actual operating hours, production rates, and types of materials processed, stored, or combusted during the selected time period.
Rule 340-222-0051 — Actual Emissions,