(a) Oxygen (O2) monitors. If the owner or operator installs a continuous emissions monitoring system (CEMS) to monitor O2, the CEMS must meet the requirements of §117.8100(a) of this title (relating to Emission Monitoring System Requirements for Industrial, Commercial, and Institutional Sources).
(b) Nitrogen oxides (NOX ) monitors. If the owner or operator installs a CEMS or predictive emissions monitoring system (PEMS) to monitor NOX , the CEMS or PEMS must meet the requirements of §117.8100(a) or (b) of this title, as applicable.
(c) Monitor installation schedule. If the owner or operator elects to installs CEMS or PEMS to monitor NOX or O2 as provided in subsections (a) and (b) of this section, installation and certification of monitoring systems must be performed in accordance with the schedule specified in §117.9340 of this title (relating to Compliance Schedule for East Texas Combustion).
(d) Testing requirements. The owner or operator of any stationary, reciprocating combustion engine subject to §117.3310 of this title (relating to Emission Specifications for Eight-Hour Attainment Demonstration) shall comply with the following testing requirements.
  (1) Each engine must be tested for NO X and O2 emissions.
  (2) Each engine that injects urea or ammonia into the exhaust stream for NOX control must be tested for ammonia emissions.
  (3) For engines not equipped with CEMS or PEMS, all testing must be conducted according to §117.8000 of this title (relating to Stack Testing Requirements). In lieu of the test methods specified in §117.8000 of this title, the owner or operator may use American Society for Testing and Materials (ASTM) D6522-00 to perform the NOX and O2 testing required by this subsection on natural gas-fired reciprocating internal combustion engines. If the owner or operator elects to use ASTM D6522-00 for the testing requirements, the report must contain the information specified in §117.8010 of this title (relating to Compliance Stack Test Reports).
  (4) Test results must be reported in the units of the applicable emission specifications and averaging periods.
  (5) For engines equipped with CEMS or PEMS, the CEMS or PEMS must be installed and operational before conducting testing under this subsection. 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.
  (6) For engines operating with CEMS or PEMS, initial compliance with the emission specifications of §117.3310 of this title may be demonstrated by using the CEMS or PEMS, after monitor certification testing, in lieu of the methods specified in §117.3335(d)(3) of this title (relating to Monitoring, Notification, and Testing Requirements).
  (7) For engines not operating with CEMS or PEMS, periodic testing for NOX emissions must be conducted according to §117.8140(a) of this title (relating to Emission Monitoring for Engines).
    (A) Retesting as specified in paragraphs (1) - (4) of this subsection is required within 60 days after any modification that could reasonably be expected to increase the NOX emission rate.
    (B) Retesting as specified in paragraphs (1) - (4) of this subsection may be conducted at the discretion of the owner or operator after any modification that could reasonably be expected to decrease the NOX emission rate, including, but not limited to, installation of post-combustion controls or low-NOX burners, low excess air operation, staged combustion (for example, overfire air), flue gas recirculation, and fuel-lean and conventional (fuel-rich) reburn.
  (8) Testing must be performed in accordance with the schedule specified in §117.9340 of this title.
(e) Ammonia monitoring. Each stationary, reciprocating combustion engine that injects urea or ammonia into the exhaust stream for NO X control must be monitored according to one of the ammonia monitoring procedures specified in §117.8130 of this title (relating to Ammonia Monitoring).
(f) Notification. The owner or operator of an affected stationary, reciprocating combustion engine must submit written notification of any CEMS or PEMS relative accuracy test audit (RATA) or testing required under this section, except for testing related to ammonia monitoring specified in subsection (e) of this section, to the appropriate regional office and any local air pollution control agency having jurisdiction at least 15 days in advance of the date of RATA or testing.

Source Note: The provisions of this §117.3335 adopted to be effective June 14, 2007, 32 TexReg 3206