(a) The owner or operator of one or more utility boiler(s) with a heat input rate of at least 5 million Btu per hour but less than 50 million Btu per hour per boiler shall maintain, in a format that can be retained unaltered for the time period specified in Env-A 902, the following information for each performance tune-up:
- (1) The identification of the boiler;
- (2) The date(s) on which the tune-up was conducted;
- (3) The name(s), title(s), and affiliation(s) of the individual(s) who conducted the tune-up;
- (4) The concentrations of NOx in the effluent stream, in parts-per-million by volume, (ppmv), measured at high fire or typical operating load, before and after the tune-up of the boiler;
- (5) The concentration of CO in the effluent stream, in ppmv, and oxygen in volume percent, measured at high fire or typical operating load, before and after the tune-up of the boiler;
- (6) A description of any corrective actions taken as a part of the tune-up of the boiler; and
- (7) For boilers capable of using more than one type of fuel, the fuel burned in the boiler during the tune-up and the type and amount of fuel used over the 12 months prior to the tune-up, provided that for units sharing a fuel meter, the allocation of fuel between those units may be estimated.
(b) Concentration measurements may be taken by either a dry or wet basis, provided that:
- (1) The same basis is used before and after the tune-up; and
- (2) All gases are measured using the same basis.
(c) The owner or operator of a wet-bottom utility boiler firing coal shall record each startup, shutdown, or low-load operation as follows:
- (1) The start and end date(s) of each occurrence;
- (2) The amount of time spent in each mode of operation; and
- (3) The actual NOx emissions in tons per day, to demonstrate compliance with Env-A 1303.06.
Source. (See Revision Note at chapter heading for Env-A 1300) #9803, eff 10-31-10; ss by #12584, eff 8-15-18 (formerly Env-A 1303.03); ss by #13581, eff 3-21-23