Gas turbine engines emit air contaminants including oxides of
nitrogen, carbon monoxide, volatile organic compounds, oxides of
sulfur, particulate matter and toxic air contaminants. Engines with
output power ratings of 0.3 MW or greater and heat input of 1 million
BTU per hour or greater require a permit to operate.
Gas turbine engines are typically fueled with natural gas and may
also use liquid fuel oil as a backup fuel. Gas turbines can also
combust biogas including landfill or digester produced gas. Small gas
turbines are often used at institutional and industrial facilities as
part of cogeneration systems, or may be utilized in simple or combined
cycle configurations to produce power for the electrical grid. For gas
turbine test cells, please see the turbine
test cell/test stand page for permitting information.
The information on this page will assist in the completion and
submittal of an application for each gas turbine. Each section of the
page contains important information needed to submit an application.
Application forms tell us about your operation and allow us to permit
your process. Accurate and complete information decreases processing
time and helps avoid additional charges for unnecessary revisions.
Please carefully review and complete the following forms. Also listed
below are required attachments that need to be submitted with the
application. You may contact the District with any questions.
General Application Word PDF
Gas Turbine Engine Supplemental Form Word PDF
-Plot Plan including stack location and nearby building dimensions
-Manufacturer emission data including startup and shutdown
-Engine specifications/data sheets including information for
different expected loads/operating scenarios
-Control equipment specifications (if applicable)
-BACT analysis including manufacturer/supplier cost estimates
-Actual emissions from existing facility (for major sources)
The general and equipment specific application forms along with
required attachments must be submitted with each application
Top of Page
The correct fee must be submitted with your application in order
for it to be accepted. For this type of equipment, fees are
determined based on the time and materials required to conduct the
review, so a fee estimate must be obtained from the District prior
to submittal. Please note that application fees are estimated
and the final fee may be more or less than this amount based on time
and materials spent processing the application. The District maintains
work records for this purpose.
Before submitting an application, contact the District (see bottom
of page) to obtain an application fee estimate for application
submittal. Please note that an additional fee may also apply depending
on the method of payment. A breakdown of how the application fee(s)
are determined can
be seen here. Additional information can be found in District
These fees may be paid by check payable to "Air Pollution
Control District" or by credit card (Visa, MasterCard, Discover,
and American Express).
If you choose to email or fax your application and intend on paying
with a credit card, you must provide contact information (name and
phone number) so that the District can complete payment.
Please note that credit card payments are assessed a transaction fee
of 2.2% that is charged by the credit card provider.
Best Available Control Technology
If a piece of equipment or a process emits more than 10 pounds per
day of particulate matter (PM10), oxides of nitrogen (NOx),
volatile organic compounds (VOC) or oxides of sulfur (SOx), the
application must include a best available control technology (BACT)
analysis. Gas turbine engines often trigger BACT requirements for any
or all of these pollutants. The District has a BACT
guide to assist with the analysis. If you have questions or need
assistance reference the contact information at the bottom of this
page. Please review District Rules 20.1, 20.2,
20.3, and 20.5.
District Rule 1200 applies to any new, relocated, or modified
emission unit which may increase emissions of one or more toxic air
contaminant(s). The proposed project must comply with Rule 1200.
Proposed equipment may require toxics best available control
technology (TBACT) depending on the project. Please review District Rule 1200
for further details.
District rules address how information that is submitted to the
District is managed. District Regulation IX contains District rules 176 and 177. Please
refer directly to these rules when submitting trade secret
information. However, be aware that you will need to submit:
1. A letter disclosing the proprietary information. This can
be submitted electronically.
2. A letter for the
explaining why the information needs to be held as trade secret.
The inclusion of proprietary information can significantly delay
permit applications. In an effort to expedite the permit
application process it is recommended that you contact the
manufacturer or vendor of any proprietary materials that are used in
the process and prepare the required letters as part of your
In 1989, the California state legislature passed a law, AB 3205,
designed to protect schoolchildren from hazardous air contaminants.
The law, as currently written, requires the District to notify parents
of schoolchildren, neighboring businesses and residents of all
new or modified equipment that emits any hazardous air contaminant
into the air which will be installed within 1,000 feet of a school
site. The law also requires the District to consider any comments
before authorizing construction. Please review your proposed location.
If a school property boundary is located within 1,000 feet of the
proposed emissions point, the AB3205 process will be initiated. This
process requires a 30 day public comment period and the overall
process will delay projects by at least six weeks.
How to Submit Application Packet
10124 Old Grove Rd
San Diego, CA 92131-1649
Select equipment type applications can now be submitted online
Access. Sign up today to get connected to your applications and permits.
The District will act on
complete applications as soon as possible but at most
within 180 days. The engineer assigned to your application will review
it and contact you within 30 days of receipt to confirm that it is
complete or request additional information. Typically permits are
issued in about 60 days. More complex processes will take longer.
Common reasons that gas turbine engine applications may take longer
than 60 days to evaluate include: the project is a complex project
specifically at a major source, if the project requires a mandatory
public notice period due to being installed within 1000 feet of a
school or triggering the requirement for a air quality impact analysis
(AQIA), if they do not initially pass a health risk assessment (HRA)
or AQIA, if BACT is not proposed or complete BACT analysis is not
submitted or for major sources if actual emission data is not
Ensuring your application is complete is the best way to reduce
processing time. Complete emissions data is the most important factor
in minimizing application processing time and iterative information
requests. If you have any questions about what information is
required, please contact the District using the information at the
bottom of this page. Learn more
about the rules that govern application processing time.
Sign up for Citizen
Access to get up to date information on the status of your application.
more about the application process and what to expect.
Depending on the construction date, stationary source emissions, fuel
type and heat input/energy output ratings, the following federal New
Source Performance Standards (NSPS) and National Emission Standards
for Hazardous Air Pollutants (NESHAP) may be applicable to your gas
turbines. If you are determining applicable requirements prior
to submittal, it is important to review each rule individually and
consult applicable requirements of the general provisions of each part
as well to comprehensively determine all requirements.
YYYY - Only applies to engines located at major sources of
hazardous air pollutants (HAP).
GG and NSPS
KKKK - GG applies to engines installed prior to February 18, 2005
and KKKK applies to engines installed after this date. These rules
contain emission standards and monitoring requirements for NOx and
SOx. The exact emission standards and monitoring techniques depend on
the size and age of the turbine engine and the control device
utilized. These rules and the associated general provisions also
contain testing, record-keeping, notification and reporting
requirements that may apply to the turbine engine. It is important to
note averaging times for the specific emission standards. Emission
standards contained in these rules do not have exemptions for startup
and shutdown periods.
The engineer assigned to an application will review the proposed
equipment to determine the requirements of these regulations that may
apply to the gas turbine and include them as conditions in your
authority to construct.
Several District rules may apply to your equipment. General rules
that may apply to gas turbine engines include Rules 50, 51, 52, 53, 54 and 62.
Equipment specific Rules 69.3 and 69.3.1 apply to gas turbine engines. A complete
listing of the District's rules can be found here.
Calculation Procedures and Additional Resources
Equipment Calculation Procedures - This page contains procedures
that should be used to calculate emissions from each gas turbine. The
correct calculation procedure should be selected based on fuel type,
turbine size and emission control technology.
Use of these calculation procedures will aid in minimizing
application review time and costs. The calculation procedure can be
found at the link at the top of each page, and the correct emission
factors selected from the list based on equipment. If available,
manufacturer provided equipment specific emission data or source
test results should be utilized before using default emission
factors. Startup and shutdown emission estimates should be
provided by the gas turbine manufacturer. Sources of all
emission data used must be included as attachments to the application.
AP-42 - An
alternative compilation of emission factors and calculation procedures
prepared by the EPA that may be utilized by the District in some
situations for some equipment types.
Need Help? Have Questions?
District or call (858) 586-2600 and ask for the duty engineer.
More in depth help and site visits can be performed by the District
Small Business Assistance Program Coordinator who can be reached at