Imperial County Air Pollution Control District Rule 400.1

400.1-1

RULE 400.1 STATIONARY GAS TURBINE(S) - REASONABLY AVAILABLE

CONTROL TECHNOLOGY (RACT)

(Adopted 02/23/2010)

A. Applicability

 

A.1 This rule limits emissions of oxides of nitrogen (NOx) from Stationary Gas 

Turbine(s).

A.2 This rule shall apply to any new or existing Stationary Gas Turbine(s) of 1 

megawatt (MW) and/or larger, unless the equipment is exempt from this 

rule pursuant to Section D.

A.3 Any Stationary Gas Turbine(s) subject to the provisions of this rule shall 

not be subject to Rule 400.

B. Definitions

 Terms applicable to this rule are defined in Rule 101- Definitions and incorporated 

them to ICAPCD Rule 101 – Definitions.

C. Requirements

C.1 Except as provided in Section D, the emission concentration of NOx from 

a Stationary Gas Turbine(s) subject to this rule, calculated as nitrogen 

dioxide (NO2) at 15% oxygen on a dry basis, shall not exceed the 

following:

C.1.a 42 parts per million by volume (ppmv) when operated on a gaseous 

fuel.

C.1.b 65 ppmv when operated on a liquid fuel.

D. Exemptions

D.1 The provisions of this rule shall not apply to the following:

D.1.a Any Stationary Gas Turbine(s) engine(s) or their components when 

operated exclusively for research, development or testing (except 

for source testing).

D.2 The provisions of Section C shall not apply to the following:

D.2.a Stationary Gas Turbine(s) which operate less than 400 hours per 

calendar year.
Imperial County Air Pollution Control District Rule 400.1

400.1-2

D.2.b Stationary Gas Turbine(s) during Startup, Shutdown or a change in 

load, when bringing the combustion process up to operating levels, 

may not exceed fifteen (15) minutes for simple cycle Stationary Gas 

Turbine(s) and two (2) hours for combined cycle and cogeneration 

cycle Stationary Gas Turbine(s), or as specified on the permit to 

operate.

D.3 Section C.1.b shall not apply to a Stationary Gas Turbine(s) while forced 

to burn nongaseous fuel during times of natural gas curtailment. This 

exemption shall not exceed 168 cumulative hours of operation per 

calendar year excluding equipment testing time not exceeding 24 hours 

per calendar year.

E. Recordkeeping

E.1 The owner or operator of a Stationary Gas Turbine(s) with a continuous 

emission monitoring system (CEMS) which has been installed to measure 

NOx emissions pursuant to any federal regulation shall certify, calibrate 

and maintain the CEMS in accordance with applicable federal regulations 

including the reporting requirements of Sections 60.7(c), 60.7(d), and 

60.13 of Title 40, Code of Federal Regulations Part 60 (40 CFR 60), 

performance specifications of Appendix B, quality assurance procedures 

of Appendix F, and a protocol approved in writing by the Air Pollution 

Control Officer (APCO).

E.2 The owner or operator of a Stationary Gas Turbine(s) subject to this rule 

shall maintain an operating log and record actual times and duration of all 

Startups, Shutdowns and fuel changes, and the type and quantity of each 

fuel used.

E.3 For the purposes of a compliance determination based on CEMS data, the 

averaging period to calculate NOx emissions concentration shall be one 

clock hour.

F. Test Methods

F.1 Compliance with the NOx emission limits in Section C shall be determined 

using United States Environmental Protection Agency (U.S. EPA) Method 

7, 7A, 7C, 7E, California Air Resources Board (CARB) Method 100, or any 

other applicable EPA approved test method.

G. Compliance Testing

G.1 Any required source testing shall be performed at no less than 90% of the 

power rating. If an owner or operator of a Stationary Gas Turbine 

demonstrates to the satisfaction of the APCO that the Stationary Gas 
Imperial County Air Pollution Control District Rule 400.1

400.1-3

Turbine cannot operate at these conditions, then emissions source testing 

shall be performed at the highest achievable continuous power rating.

G.2 Stationary Gas Turbine(s) subject to the requirements of Section C shall 

demonstrate compliance through emission compliance testing not less 

than once every 12 months. All emission rates shall be based on an 

hourly average. Frequency of compliance testing may be extended under 

the following:

G.2.a The frequency of compliance testing may be extended to not less 

than every 36 months for Stationary Gas Turbine(s) which operate 

less than 100 hours per 12 month period (as demonstrated by 

operational logs) and which emit less than 5 tons of NOx per 12 

month period.

G.2.b The frequency of compliance testing may be extended to not less 

than every five (5) years for secondary fuel testing for Stationary 

Gas Turbine(s) which operate less than 100 hours per 12 month 

period under this fuel (as demonstrated by operational logs) and 

which emit less than 5 tons of NOx per 12 month period operating 

under secondary fuel. This period may be extended if a source can 

prove no secondary fuel has been fired

G.3 Test reports shall include the operational characteristics recommended by 

the manufacturer to ensure compliance with the applicable emission limits 

of this rule of a Stationary Gas Turbine(s) and of all add-on NOx control 

systems.

G.4 For the purpose of a compliance determination based on source testing, 

the NOx emissions concentration shall be calculated as an average of 

three test runs.

G.5 At least 30 days prior to the scheduled source test date, the owner or 

operator of a unit subject to this rule shall submit a source test plan to the 

APCO. At least seven days prior to the source test, the owner or operator 

shall notify the APCO of the exact date and time of the source test. A final 

source test result shall be submitted to the APCO within 60 days following 

the actual source test date.

H. Records Retention

H.1 The owner or operator of any Stationary Gas Turbine(s) subject to this rule 

shall maintain all records required by this rule for a minimum of two (2) 

calendar years. Title V facilities shall maintain these records for five (5) 

calendar years. These records shall be maintained on the premises and 

made available to the District upon request.