(a) The owner or operator of any unit subject to §117.305 or §117.310 of this title (relating to Emission Specifications for Reasonably Available Control Technology (RACT); and Emission Specifications for Attainment Demonstration) shall test the unit as follows.
  (1) The unit must be tested for nitrogen oxides (NO X ), carbon monoxide (CO), and oxygen emissions while firing gaseous fuel or, as applicable:
    (A) hydrogen (H2) fuel for units that may fire more than 50% H2 by volume; and
    (B) liquid and solid fuel.
  (2) Units that inject urea or ammonia into the exhaust stream for NOX control must be tested for ammonia emissions.
  (3) All units must be tested that belong to equipment classes elected to be included in:
    (A) the alternative plant-wide emission specifications as defined in §117.315(f) of this title (relating to Alternative Plant-Wide Emission Specifications); or
    (B) the source cap as defined in §117.323(b)(4) of this title (relating to Source Cap).
  (4) Initial demonstration of compliance testing must be performed in accordance with the schedule specified in §117.9020 of this title (relating to Compliance Schedule for Houston-Galveston-Brazoria Ozone Nonattainment Area Major Sources).
(b) The initial demonstration of compliance tests required by subsection (a) of this section must use the methods referenced in subsection (e) or (f) of this section and must be used for determination of initial compliance with the requirements of this division (relating to Houston-Galveston-Brazoria Ozone Nonattainment Area Major Sources). Test results must be reported in the units of the applicable emission specification and averaging periods.
(c) Any continuous emissions monitoring system (CEMS) or any predictive emissions monitoring system (PEMS) required by §117.340 of this title (relating to Continuous Demonstration of Compliance) must be installed and operational before conducting testing under subsection (a) of this section. Verification of operational status must, as a minimum, include completion of the initial relative accuracy test audit and the manufacturer's written requirements or recommendations for installation, operation, and calibration of the device or system.
(d) Early testing conducted before March 21, 1999, may be used to demonstrate compliance with the requirements of this division, if the owner or operator of an affected facility demonstrates to the executive director that the prior compliance testing at least meets the requirements of subsections (a), (b), (c), (e), and (f) of this section. For early testing, the compliance stack test report required by subsection (g) must be as complete as necessary to demonstrate to the executive director that the stack test was valid and the source has complied with the rule. The executive director reserves the right to request compliance testing or CEMS or PEMS performance evaluation at any time.
(e) Compliance with the requirements of this division for units operating without CEMS or PEMS must be demonstrated according to the requirements of §117.8000 of this title (relating to Stack Testing Requirements).
(f) Initial compliance with the requirements of this division for units operating with CEMS or PEMS in accordance with §117.340 of this title, must be demonstrated after monitor certification testing using the CEMS or PEMS as follows.
  (1) For boilers and process heaters complying with a NOX emission specification in pounds per million British thermal units on a rolling 30-day average, NOX emissions from the unit are monitored for 30 successive unit 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 hourly emissions data recorded by the monitoring system during the 30-day test period.
  (2) For units complying with a NOX emission specification on a block one-hour average, any one-hour period while operating at the maximum rated capacity, or as near thereto as practicable is used to determine compliance with the NOX emission specification.
  (3) For units complying with a CO emission specification, on a rolling 24-hour average, any 24-hour period is used to determine compliance with the CO emission specification.
  (4) For units complying with §117.323 of this title, a rolling 30-day average of total daily pounds of NOX emissions from the units are monitored (or calculated in accordance with §117.323(c) of this title) for 30 successive source 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.
(g) Compliance stack test reports must include the information required in §117.8010 of this title (relating to Compliance Stack Test Reports).

Source Note: The provisions of this §117.335 adopted to be effective June 14, 2007, 32 TexReg 3206