# 60.4331 What are the requirements for operating a stationary temporary combustion turbine?
(a) Notwithstanding any other provision of this subpart, you may operate a small- or medium-size stationary combustion turbine (*i.e.,* combustion turbine with a base load rating less than or equal to 850 MMBtu/h) at a single location for up to 24 consecutive months, so long as you comply with all of the requirements in paragraphs (b) through (e) of this section.
(b) You must meet the NO<sub>X</sub> emissions standard for stationary temporary combustion turbines in table 1 to this subpart and the applicable SO<sub>2</sub> emissions standard in § 60.4330.
(c) Unless you elect to demonstrate compliance through the otherwise-applicable monitoring, recordkeeping, and reporting requirements of this subpart, compliance with the NO<sub>X</sub> emissions standard must be demonstrated through maintaining the documentation in paragraphs (c)(1) and (2) of this section on-site:
(1) Each stationary temporary combustion turbine has a manufacturer's emissions guarantee at or below the full load NO<sub>X</sub> emissions standard in table 1 to this subpart; and
(2) Each such turbine has been performance tested at least once in the prior 5 years as meeting the NO<sub>X</sub> emissions standard in table 1 to this subpart.
(d) Unless you elect to demonstrate compliance through the otherwise-applicable monitoring, recordkeeping, and reporting requirements of this subpart, compliance with the SO<sub>2</sub> emissions standard must be demonstrated through complying with the provisions in § 60.4365.
(e) The conditions in paragraphs (e)(1) through (3) of this section apply in determining whether your stationary combustion turbine qualifies as a stationary temporary combustion turbine.
(1) The turbine may only be located at the same stationary source (or group of stationary sources located within a contiguous area and under common control) for a total period of 24 consecutive months. This is the total period of residence time allowed after the turbine commences operation at the location, regardless of whether the turbine is in operation for the entire 24-consecutive-month period.
(2) Any temporary combustion turbine that replaces a temporary combustion turbine at a stationary source and performs the same or similar function will be included in calculating the consecutive time period.
(3) The relocation of a stationary temporary combustion turbine within a single stationary source (or a group of stationary sources located within a contiguous area and under common control) while performing the same or similar function (*i.e.,* serving the same electric, mechanical, or thermal load) does not restart the 24-calendar-month residence time period.
[91 FR 1979, Jan. 15, 2026]