On March 17, 2005, the APCD Board adopted revisions to Rule 202, as required by state law. Diesel engines rated at greater than 50 brake-horsepower are now required to obtain APCD permits. New engines require a permit before installation; owners/operators with existing engines were required to submit applications by no later than June 16, 2005.  If you own/operate an existing engine, and did not submit an application by June 16, 2005, your application is now overdue.  Per the October 18, 2007 updates to the ATCM, Agricultural engines are required to obtain a Registration. See Permit Application Material below.

Advisories

• January 2026:  The District’s DICE Screening Tool, User Guide and Background Document for performing HRA screenings for permitting new diesel engines were updated.
• December 2018:  The Portable Diesel ATCM (opens in a new tab) and PERP Regulation (opens in a new tab) have been revised.  A summary of the changes (opens in a new tab) is now available.
• August 2018:  Information on use of emergency generators during a utility company’s Public Safety Power Shutdown (PSPS) implementation:
  • If a utility company starts the power outage under a PSPS program, businesses will be compliant with APCD rules in using their permitted emergency standby generators once the outage has occurred, if they are within the outage area.
    • Businesses will not be compliant in doing so if they are outside of the outage area.
    • Businesses will not be compliant if they start use of the generator prior to the start of an outage, even if they are within the planned outage area.
• 10/25/17:  Updated ATCM Recordkeeping Annual Report Form ENF-92
• 04/17/17:  EPA Large Engine Certification Webpage (opens in a new tab)

Frequently Asked Questions – FAQs

• SBCAPCD: Commonly Referenced ATCM Definitions (opens in a new tab)
• SBCAPCD: Compliance ATCM FAQ (opens in a new tab), AG Engine FAQ
• How Do I Estimate Engine Horsepower from Generator kW?
• Air Resources Board ATCM FAQ: ARB ATCM FAQ (opens in a new tab), ARB AG Engine FAQ
• Fact Sheet: Existing Diesel IC Engines – What to know (opens in a new tab)
• Fact Sheet: New Diesel IC Engines – What to know (opens in a new tab)
• Operating PERP-Registered Engines at Stationary Sources (opens in a new tab)
• AG Engine Requirements Flowchart and Notes

Permit Application Material

(Please note Forms -34E, -34P, -34R, -36, and -01 can be completed online prior to printing for submission to the APCD.  They can only be saved “with your data” to your computer if you own Adobe’s Acrobat Standard or Professional software).

• Diesel Emergency/Standby Engine Application Form -35 for Engines Installed Prior to Jan. 01, 2005
• Diesel-Fired Emergency/Standby Engine Application Form -34E
• Diesel-Fired Primary Engine Application Form -34P
• APCD General Permit Application Form -01
• Authorized Agent Form -01A
• ATCM Emission Inventory Form -34R
• Existing Residential Diesel Generator Application Form -37
• New Residential Diesel Generator Engine Application Form -36
• AG Registration Application and AG Application Instruction (Ag1 and Ag2 forms) Download from this page.
• ARB Portable Equipment Registration Program Link: (PERP (opens in a new tab)).  Current PERP Regulation (here (opens in a new tab))
•  Requirements for Use of PERP Engines Offshore:
  • Per District Rule 202.F.2, portable engines registered in the Statewide Portable Equipment Registration Program (PERP) and used offshore are subject to certain requirements.  Please refer to the Procedure for Offshore Use of Portable Engines for clarification of these requirements.  In general, the owner or operator of a registered engine must notify the District in writing at least 14 days prior to commencing operations in State Territorial Waters (STW) or over the Outer Continental Shelf (OCS) offshore Santa Barbara County. Written authorization from the District is required prior to operating a PERP engine in STW or over the OCS. There are limited exceptions as noted in the Procedure referenced above.
  • Use form APCD-38p. The completed form may be emailed to [email protected], or mailed to the attention of the Engineering Division at: Santa Barbara County Air Pollution Control District, 260 N. San Antonio Road, Suite A, Santa Barbara, CA 93110.

Compliance Forms

• ATCM Recordkeeping Annual Report Form ENF-92
• Temporary IC Engine Replacement Notification Form ENF-94
• Temporary IC Engine Replacement Report Form ENF-95
• Permanent IC Engine Replacement Notification Form ENF-96

Reference Material

• USEPA Engine Tier Standards (opens in a new tab)
• APCD Default Diesel Engine Emission Factors (opens in a new tab)
• APCD IC Engine Technical Reference Document (11/01/2002)
• APCD Emergency Standby Diesel Engine Emission Calculation Spreadsheet
• APCD Prime Diesel Engine Emission Calculation Spreadsheet
• APCD Summary of Changes to PERP Regulation and Portable Diesel ATCM (opens in a new tab)
• ARB – Diesel Emission Control Strategy Pre-Installation Compatibility Assessment Requirements (opens in a new tab)
• ARB –  Amendments to requirements for Stationary Compression-Ignition (DIESEL) Engines
• ARB – California’s Diesel Risk Reduction Plan: Diesel PM Control Technologies (opens in a new tab)
• ARB – In-Use Diesel AG Engines
• ARB – Diesel Emission Control Strategies Verification – Stationary Engines
• ARB – Diesel Fuel Page
• ARB – List of Approved Source Test Companies
• ARB – Off-Road Engine Certification Database
• Stationary Diesel IC Engine ATCM
  • Revised May 19, 2011 (PDF).
  • Revised October 2007 (PDF).  Markup version (PDF)
  • Revised September 2005 (PDF).  Summary of revisions (PDF).
  • Original December 2004  (PDF, Word)
• Portable Diesel IC Engine ATCM
  • Revised November 30, 2018 (PDF (opens in a new tab))
  • Revised February 19, 2011 (PDF)
  • Revised September 2007 (PDF)
  • Original February 2005 (PDF).
• OEHHA –  Diesel Exhaust Fact Sheet
• US EPA – Engine Family Name Format
• Johnson-Matthey CRT Emissions Control System Technical Advisory (11-15-07)
• DICE Internet Resources for Engine and Emission Control Device Manufacturers

Please note that application forms (such as Form -01) are also available for download at Download Permit Application Forms.

For more information or assistance, contact us via email at [email protected].

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