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. For most boilers, you will complete the standard
supplemental form. For low-use or temporary boilers (under 220,000
therms per year or under 10% capacity) using natural gas or propane,
please complete the low-use/temporary boiler supplemental form only.
Low-use/temporary boiler applications may also be submitted
online. You may contact the District with any questions.
General Application Word PDF
Standard Boiler Supplemental Form Word PDF
Low-Use/Temporary Boiler Supplemental Form Word
Plot Plan including stack location and nearby building dimensions
Manufacturer supplied emission data or source test results
Boiler specification/data sheet
Control equipment specifications (if applicable)
BACT analysis (if applicable)
The general and equipment specific application forms along with all
required attachments must be submitted with each application packet.
Top of Page
The correct fee must be submitted with your application in order
for it to be accepted. For this type of equipment, depending on the
application type, the fees are either listed in the table(s) below
or are determined based on the time and materials required to
conduct the review. If your application type is not listed in the
table(s), a fee estimate must be obtained from the District prior to
submittal. Please note that the fees listed in these tables 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.
Boilers < 50 MMBtu/hr heat input, annual fuel use
220,000 therms or less
Boilers < 50 MMBtu/hr heat input, annual fuel use
greater than 220,000 therms
Before submitting an application not listed in the table(s), 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. Boilers can trigger BACT requirements for any of these
pollutants depending on size and fuel type. 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
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 boiler or process heater permits may take longer
than 60 days to evaluate include: if they require 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) or
if they do not initially pass a health risk assessment (HRA) or AQIA.
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 installation date, stationary source emissions, and
fuel type the following federal New Source Performance Standards
(NSPS) and National Emission Standards for Hazardous Air Pollutants
(NESHAP) may be applicable to your boiler.
Major source Boiler NESHAP (subpart DDDDD) -
Applies to boilers that will be located at major sources of HAP emissions.
Area source Boiler NESHAP (subpart JJJJJJ) -
Does not apply to boilers fired only on natural gas or with liquid
fuel only for emergencies.
Boiler NSPS - Separate rules for boilers between 10 MMBtu/hr and 100
MMBtu/hr (subpart Dc) and boilers greater than 100
MMBtu/hr that are not utility boilers (subpart Db). The rules contain emission
standards for NOx, PM and SOx for some boilers; however, subpart Dc
does not have any NOx emission standards. Additional requirements
include monitoring and recordkeeping requirements. Most boilers fired
on only natural gas or fuel oil meet the requirements of this rule by
using low sulfur containing fuels and keeping fuel records.
Utility Boiler Rules - Boilers used to produce steam that is fed to
a steam turbine used to produce grid electricity are subject to
additional rules include NSPS subpart Da and may be subject to others.
The engineer assigned to an application will review the proposed
equipment to determine the requirements of these regulations that may
apply and include them as conditions in your authority to
Several District rules may apply to your equipment. General rules
that may apply to boilers and process heaters include Rules 50, 51, 52, 53, 54 and 62.
Equipment specific Rules 69 and 69.2 apply to boilers and process heaters. However
rule 69 applies only to electric utility boilers. Rule 69.2 contains
emission standards for NOx, testing, monitoring and other operational
requirements. Depending on size and annual heat input, the rule
requires either annual testing or annual tuneups among other
requirements. A complete listing of the District's rules can be
Calculation Procedures and Additional Resources
Equipment Calculation Procedures - This page contains procedures
that should be used to calculate emissions from each boiler or process
heater. The correct calculation procedure should be selected based on
fuel type 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. 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