California's Diesel Risk Reduction Plan

This page last reviewed June 10, 2008

Risk Management Guidance for the Permitting of
New Stationary Diesel-Fueled Engines


Risk Management Guidance for the Permitting of New Stationary Diesel-Fueled Engines:
The Risk Management Guidance for the Permitting of New Stationary Diesel-Fueled Engines (Guidance) is a non-regulatory document that was adopted in September 2000 to assist local air pollution control districts and air quality management districts in making risk management decisions associated with the permitting of new stationary diesel-fueled engines. U.S. EPA LargeEngine (On-Highway and Nonroad Compression-Ignition) Certification Data:
U.S. EPA certifies (formally verifies) that engines sold in the U.S. meet federal emissions standards. Each year, newly manufactured engines must be certified, and engines certified in previous years must be recertified. U.S. EPA publishes on the internet the information used to certify these engines. The data below were extracted from the 2001 U.S. EPA Large Engine (On-Highway and Nonroad Compression-Ignition) Certification Data.

To help District permitting engineers and the purchasers of diesel-fueled stationary engines identify engines which will conform to the Risk Management Guidance (listed at the top of this page), we have prepared summaries which identify engines in the U.S. EPA Large Engine Certification Data database which have PM emissions of < 0.149 g/bhp-hr.

Description of the Data:
  1. There are two databases posted on this website - a "summary" table and an "extended" table. Both include information for engines that emit 0.149 g/bhp-hr particulate matter (PM) or less. The summary version includes only diesel-fueled engines and a limited number of data columns. The summary version is a subset of the extended version. The summary version can be viewed online as an HTML file or it can be downloaded as an Excel (*.xls) file for printing and data manipulation. The extended version includes CI engines of all fuel types and all U.S. EPA data columns. The data for engines using fuels other than diesel are italicized in the extended table. The extended version is posted as an Excel (*.xls) file which must be downloaded for viewing, printing, and data manipulation.
  2. Please view more information regarding the data and the definitions for the column headings and abbreviations or visit the U.S. EPA site at www.epa.gov/otaq/certdat2.htm.
  3. Only diesel-fueled engines are included in the summary table. The data
    for engines using fuels other than diesel are italicized in the extended table.
  4. In the extended table you may sort by Manufacturer and then Engine Family to see the relationship between the new submissions and corrections/modifications to the new submissions.
  5. Sort by Original U.S. EPA Sort Order to view the entries in the order they appear in the U.S. EPA database.
  6. The relevant data have been extracted from the voluminous U.S. EPA database. Therefore, some entries have been deleted from both of the tables. These include:
    • Duplicate entries;
    • Engines with particulate matter emissions greater than 0.149 g/bhp-hr;
    • Engines that do not include PM emissions data.

View/Download the Data:


If you have any questions regarding the Guidance, please contact Alex Santos at (916)324-1003.

Air Toxics Program

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