(a) The owner or operator of all units that are subject to this division (relating to Houston-Galveston-Brazoria Ozone Nonattainment Area Utility Electric Generation Sources) shall test the units as follows.
  (1) The units must be tested for nitrogen oxides (NO X ), carbon monoxide (CO), and oxygen (O2) emissions.
  (2) Units that inject urea or ammonia into the exhaust stream for NOX control must be tested for ammonia emissions.
  (3) Testing must be performed in accordance with the schedules specified in §117.9120 of this title (relating to Compliance Schedule for Houston-Galveston-Brazoria Ozone Nonattainment Area Utility Electric Generation Sources).
(b) The tests required by subsection (a) of this section must be used for determination of initial compliance with the emission specifications of this division. Test results must be reported in the units of the applicable emission specifications and averaging periods. If compliance testing is based on 40 Code of Federal Regulations Part 60, Appendix A reference methods, the report must contain the information specified in §117.8010 of this title (relating to Compliance Stack Test Reports).
(c) Continuous emissions monitoring systems (CEMS) or predictive emissions monitoring systems (PEMS) required by §117.1240 of this title (relating to Continuous Demonstration of Compliance) must be installed and operational before testing under subsection (a) of this section. Verification of operational status must, at a minimum, include completion of the initial monitor certification and the manufacturer's written requirements or recommendations for installation, operation, and calibration of the device.
(d) Initial compliance with the requirements of this division for units operating with CEMS or PEMS in accordance with §117.1240 of this title must be demonstrated after monitor certification testing using the NOX CEMS or PEMS as follows.
  (1) To comply with the NOX emission specification in pounds per million British thermal units (lb/MMBtu) on a rolling 30-day average, NOX emissions from a unit are monitored for 30 successive unit operating days and the 30-day average emission rate is used to determine compliance with the NO X emission specification. The 30-day average emission rate is calculated as the average of all hourly emissions data recorded by the monitoring system during the 30-day test period.
  (2) To comply with the NOX emission specification in lb/MMBtu on a rolling 24-hour average, NO X emissions from a unit are monitored for 24 consecutive operating hours and the 24-hour average emission rate is used to determine compliance with the NOX emission specification. The 24-hour average emission rate is calculated as the average of all hourly emissions data recorded by the monitoring system during the 24-hour test period. Compliance with the NOX emission specification for fuel oil firing must be determined based on the first 24 consecutive operating hours a unit fires fuel oil.
  (3) For any electric generating facility (EGF) complying with §117.1220 of this title (relating to System Cap), a rolling 30-day average of total daily pounds of NOX emissions from the EGF must be monitored (or calculated in accordance with §117.1220(e) of this title) for 30 successive system operating days and the 30-day average emission rate is used to determine compliance with the NOX emission specification. The 30-day average emission rate is calculated as the average of all daily emissions data recorded by the monitoring and recording system during the 30-day test period. There must be no exceedances of the maximum daily cap during the 30-day test period.
  (4) To comply with the NOX emission specification in pounds per hour or parts per million by volume (ppmv) at 15% O2 dry basis, on a block one-hour average, any one-hour period while operating at the maximum rated capacity, or as near thereto as practicable, after CEMS or PEMS certification testing required in §117.1240 of this title is used to determine compliance with the NOX emission specification.
  (5) To comply with the CO emission specification in ppmv on a rolling 24-hour average, CO emissions from a unit are monitored for 24 consecutive hours and the rolling 24-hour average emission rate is used to determine compliance with the CO emission specification. The rolling 24-hour average emission rate is calculated as the average of all hourly emissions data recorded by the monitoring system during the 24-hour test period.

Source Note: The provisions of this §117.1235 adopted to be effective June 14, 2007, 32 TexReg 3206