| (C) the steam-to-fuel or water-to-fuel ratio; (5) for hydrogen (H2) fuel monitoring in accordance with §117.140(j) of this title, records of the volume percent H2 every three hours; (6) for units claimed exempt from emission specifications using the exemption of §117.103(a)(6)(D) or (b)(2) of this title (relating to Exemptions), either records of monthly: (A) fuel usage, for exemptions based on heat input; or (B) hours of operation, for exemptions based on hours per year of operation. In addition, for each engine claimed exempt under §117.103(a)(6)(D) of this title, written records must be maintained of the purpose of engine operation and, if operation was for an emergency situation, identification of the type of emergency situation and the start and end times and date(s) of the emergency situation; (7) records of carbon monoxide measurements specified in §117.140(d) of this title; (8) records of the results of initial certification testing, evaluations, calibrations, checks, adjustments, and maintenance of CEMS, PEMS, or steam-to-fuel or water-to-fuel ratio monitoring systems; (9) records of the results of performance testing, including initial demonstration of compliance testing conducted in accordance with §117.135 of this title; and (10) for each stationary reciprocating internal combustion engine and stationary gas turbine for which the owner or operator elects to use the alternative monitoring system allowed under §117.140(a)(2)(D) of this title, records of the daily average horsepower and total daily hours of operation. Units that are monitored according to §117.140(a)(2)(D) of this title are not required to keep records of annual fuel usage as required by paragraph (1) of this subsection. |
