Current through Reg. 50, No. 13; March 28, 2025
(a) Recordkeeping. The owner or operator of a unit subject to §
117.2110 of this title (relating to Emission Specifications for Eight-Hour Attainment Demonstration) shall maintain written or electronic records of the data specified in this subsection. Such records must be kept for a period of at least five years and must be made available upon request by authorized representatives of the executive director, the United States Environmental Protection Agency, or local air pollution control agencies having jurisdiction. The records must include:
(1) for each unit using a continuous emission monitoring system (CEMS) or predictive emission monitoring system (PEMS) in accordance with §
117.2135(b) of this title (relating to Monitoring, Notification, and Testing Requirements) monitoring records of:
(A) hourly emissions for units complying with an emission specification enforced on a block one-hour average; and
(B) daily emissions for units complying with an emission specification enforced on a rolling 30-day average. Emissions must be recorded in units of:
(i) pounds per million British thermal units (MMBtu) heat input; and
(ii) pounds or tons per day;
(2) for each stationary internal combustion engine subject to §
117.2110 of this title, records of:
(A) emissions measurements required by §
117.2130(b)(3) of this title (relating to Operating Requirements); and
(B) catalytic converter, air-fuel ratio controller, or other emissions-related control system maintenance, including the date and nature of corrective actions taken;
(3) records of carbon monoxide (CO) measurements specified in §
117.2130(b)(3) of this title;
(4) 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; and
(5) records of the results of performance testing, including the testing conducted in accordance with §
117.2135(d) of this title.
(b) Records for exempt engines. The following records must be maintained for at least five years and must be made available upon request to representatives of the executive director, the United States Environmental Protection Agency, or any local air pollution control agency having jurisdiction.
(1) Written records of the number of hours of operation for each day's operation must be maintained for each engine claimed exempt under §
117.2103(5), (8), (9), or (10) of this title (relating to Exemptions) or §
117.2130(b)(3) of this title.
(2) For each engine claimed exempt under §
117.2103(5) 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.
(3) For each engine claimed exempt under §
117.2103(10) of this title, records must be maintained of manufacturer's specifications or test data sufficient to demonstrate compliance with the emission standard specified in §
117.2103(10)(C) of this title.
(c) Records of operation for testing and maintenance. The owner or operator of each stationary diesel or dual-fuel engine shall maintain the following records for at least five years and make them available upon request by authorized representatives of the executive director, the United States Environmental Protection Agency, or local air pollution control agencies having jurisdiction:
(1) date(s) of operation;
(2) start and end times of operation;
(3) identification of the engine; and
(4) total hours of operation for each month and for the most recent 12 consecutive months.
