(a) Monitoring requirements. The following monitoring requirements apply to the owner or operator of an application process subject to this division that uses a vapor control system in accordance with §115.473(a)(2) of this title (relating to Control Requirements). The owner or operator shall install and maintain monitors to accurately measure and record operational parameters of all required control devices, as necessary, to ensure the proper functioning of those devices in accordance with design specifications, including:
  (1) continuous monitoring of the exhaust gas temperature immediately downstream of direct-flame incinerators or the gas temperature immediately upstream and downstream of any catalyst bed;
  (2) the total amount of volatile organic compounds (VOC) recovered by carbon adsorption or other solvent recovery systems during a calendar month;
  (3) continuous monitoring of carbon adsorption bed exhaust; and
  (4) appropriate operating parameters for vapor control systems other than those specified in paragraphs (1) - (3) of this subsection.
(b) Recordkeeping requirements. The following recordkeeping requirements apply to the owner or operator of an application process subject to this division.
  (1) The owner or operator shall maintain records of the testing data or the material safety data sheet in accordance with the requirements in §115.475(1) of this title (relating to Approved Test Methods and Testing Requirements). Records must be sufficient to demonstrate continuous compliance with the applicable VOC limits in §115.473(a), (e), or (f) of this title.
  (2) The owner or operator of an application process claiming an exemption in §115.471 of this title (relating to Exemptions) shall maintain records sufficient to demonstrate continuous compliance with the applicable exemption criteria.
  (3) The owner or operator shall maintain records of any testing conducted at an affected facility in accordance with the provisions specified in §115.475(3) and (4) of this title.
  (4) Records must be maintained a minimum of two years and made available upon request to authorized representatives of the executive director, the United States Environmental Protection Agency, or any local air pollution agency with jurisdiction.

Source Note: The provisions of this §115.478 adopted to be effective December 29, 2011, 36 TexReg 8897; amended to be effective May 16, 2024, 49 TexReg 3292