Diesel Internal Combustion Engine (DICE) Air Toxic Control Measure

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.

– Have an emergency standby generator? Just want the basics? Click here.
– For agricultural (AG) engines, click here.
– For residential generators, click here.
– For information on public safety power shutoff events, click here.


  • December 2018:  The Portable Diesel ATCM and PERP Regulation have been revised.  A summary of the changes is now available.
  • November 2018:  The District’s DICE Screening Tool, User Guide and Background Document are now available for performing HRA screenings for permitting new diesel engines.
  • 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

Frequently Asked Questions – FAQs

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).

Compliance Forms

Reference Material

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].

Return to Engineering Programs