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County of San Diego

Airborne Toxic Control Measure


Stationary Compression Ignition Engines



The California Air Resources Board (ARB) adopts airborne toxic control measures (ATCM) to reduce emissions of toxic air contaminants (TAC).  Once ARB has adopted an ATCM, the San Diego County Air Pollution Control District (District) is required to implement and enforce the regulation.

ARB adopted an ATCM for Stationary Compression-Ignition (CI) Engines (17 CCR §93115) on February 26, 2004 to control diesel particulate matter (PM), which was declared a TAC in 1998.  The ATCM became effective on December 8, 2004.  This ATCM applies to all existing stationary diesel-fueled engines greater than 50 bhp installed before January 1, 2005 and all new stationary diesel engines installed on or after January 1, 2005.

The District created two reporting forms to assist facilities in meeting the reporting requirements.  The Engine Data Report and the Compliance Strategy Report, must be submitted to the District for each in-use engine.  Engine Data Report must be submitted to the District for each engine.  In addition, the Compliance Strategy Report form must be submitted not less than 6 months prior to various compliance dates specified in the ATCM.  Failure to submit the information required by either of these forms is a violation of the ATCM requirements.  Businesses are free to create their own reporting forms as long as they contain all the information required by the ATCM in Subsection (e)(4).

Application Requirements for Existing Permit
ARB adopted amendments to the ATCM that became effective on September 9,2005. Click here to view the amended version.

The "Compliance Assistant Fact Sheet" contains information and compliance dates in the ATCM.  A Compliance Advisory was issued in 2005. 

The District will require some in-use engine owners or operators to submit a general application (APP116) and supplemental application (Form 34A-J) to modify their existing permit to verify compliance with the ATCM.  Such engines would include all prime engines and any emergency engine, which will need more than 30 hours per year for maintenance and testing.  These engines must submit an application to the District no later than 180-days prior to the engine’s compliance date in the ATCM. 

Click Here to view forms, guidance documents, and applications.

If you need further assistance, or have questions regarding ATCM implementation, please contact Cara Bandera at (858) 586-2751 or by email at Cara.Bandera@sdcounty.ca.gov  or Kevin Heiss at (858) 586-2656 or by email at Kevin.Heiss@sdcounty.ca.gov.





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