1. (1) For sources located in areas with an established short term SER that is measured over an averaging period less than a full year, PSELs are required on a short term basis for those regulated pollutants that have a short term SER. The short term averaging period is daily, unless emissions cannot be monitored on a daily basis. The averaging period for short term PSELs can never be greater than monthly.

   1. (a) For new and existing sources with potential to emit less than the short term SER, the short term PSEL will be set equal to the short term potential to emit.
   2. (b) For existing sources with potential to emit greater than or equal to the short term SER, a short term PSEL will be set equal to the source's short term potential to emit or to the current permit’s short term PSEL, whichever is less.
   3. (c) For new sources with potential to emit greater than or equal to the short term SER, the initial short term PSEL will be set at the level requested by the applicant provided the applicant meets the requirements of (2)(b).

2. (2) If a permittee requests an increase in a short term PSEL that will exceed the short term netting basis by an amount equal to or greater than the short term SER, the permittee must satisfy the requirements of subsections (a) or (b). In order to satisfy the requirements of subsection (a) or (b), the short term PSEL increase must first be converted to an annual increase by multiplying the short term increase by 8,760 hours, 365 days, or 12 months, depending on the term of the short term PSEL.

   1. (a) Obtain offsets in accordance with the offset provisions for the designated area as specified in OAR 340-224-0510 through 340-224-0530, as applicable; or
   2. (b) Obtain an allocation from an available growth allowance in accordance with the applicable maintenance plan.

3. (3) Once the short term PSEL is increased pursuant to section (2), the increased level becomes the basis for evaluating future increases in the short term PSEL.

   [NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.]

Statutory/Other Authority

ORS 468.020, 468A.025, 468A.040 & 468A.310

Statutes/Other Implemented

ORS 468A

History

DEQ 19-2022, amend filed 11/18/2022, effective 03/01/2023
DEQ 13-2019, amend filed 05/16/2019, effective 05/16/2019
DEQ 7-2015, f. & cert. ef. 4-16-15
DEQ 5-2011, f. 4-29-11, cert. ef. 5-1-11
DEQ 6-2001, f. 6-18-01, cert. ef. 7-1-01