Emissions from a stationary combustion turbine that was constructed prior to May 27, 1999 shall be limited at all times to the applicable hourly average NOx RACT emission limits specified below:

1. (a) For combined and regenerative cycle combustion turbines:

   1. (1) For gas-fired turbines without oil back-up, 42 ppmvd, corrected to 15% O2, or 0.155 lb. per million Btu;

   2. (2) For gas-fired turbines with oil back-up, the more stringent of:

      1. a. When operating on gas, 42 ppmvd, corrected to 15% O2, or 0.155 lb. per million Btu; or
      2. b. When operating on oil, 65 ppmvd, corrected to 15% O2, or 0.253 lb. per million Btu; and
   3. (3) For oil-fired turbines, 65 ppmvd, corrected to 15% O2, or 0.253 lb. per million Btu;

2. (b) For simple cycle combustion turbines:

   1. (1) For gas-fired turbines without oil back-up, 55 ppmvd, corrected to 15% O2, or 0.203 lb. per million Btu;
   2. (2) For oil-fired turbines, 75 ppmvd, corrected to 15% O2, or 0.292 lb. per million Btu; and

   3. (3) For gas-fired turbines with oil back-up:

      1. a. When operating on gas, 55 ppmvd, corrected to 15% O2, or 0.203 lb. per million Btu; and
      2. b. When operating on oil, 75 ppmvd, corrected to 15% O2, or 0.292 lb. per million Btu.

Source. (See Revision Note at chapter heading for Env-A 1300) #9803, eff 10-31-10; ss by #12584, eff 8-15-18