The District’s Approved Emission Factors for Toxic Air Contaminants and associated spreadsheet with emission factors, SBCAPCD-Approved TAC Emission Factors.xlsx, were updated. Updates include emission factors for Hot Mix Asphalt Plants, Aggregate Materials and Haul Roads. A complete list of changes can be found in the history of updates to approved emission factors for toxic air contaminants. More information can be found on the District’s Toxic Air Contaminant Emission Factors webpage.
- 6/13/19: The District published our User Guide for HRA Screenings, which describes how to conduct site-specific HRA screenings for any source type.
- 5/28/19: The District’s Approved Emission Factors for Toxic Air Contaminants and associated spreadsheet with emission factors, SBCAPCD-Approved TAC Emission Factors.xlsx, were updated. A complete list of changes can be found in the history of updates to approved emission factors for toxic air contaminants. More information can be found on the District’s Toxic Air Contaminant Emission Factors webpage.
- 11/15/18: The District’s DICE Screening Tool is available for use when permitting new diesel engines in Santa Barbara County. A user guide and a background document for the screening tool are also available. More information about the tool can be found on the District’s DICE Health Risk Assessment Screening Tool webpage.
- 10/4/18: The District’s prioritization score calculation spreadsheet was updated.
- 8/16/18: The District’s Modeling Guidelines for Health Risk Assessments form (APCD-15i) was updated. A complete list of changes can be found in the history of updates to Form -15i.
- 8/1/11: An informational page about the Federal Regulations for Reciprocating Internal Combustion Engines (NESHAP Subpart ZZZZ, NSPS Subpart IIII and NSPS Subpart JJJJ) is now available.
- 1/22/10: A link has been added to our Reference Material section of this page for the California Air Resources Board “Hot Spots” Stationary Diesel Engine Screening Risk Assessment Tables.
- 12/17/09: An informational page about the Federal Regulation for Paint Stripping and Miscellaneous Surface Coating Operations (NESHAP Subpart HHHHHH) is now available.
- Modeling Guidelines for Health Risk Assessments: Form-15i. All refined health risk assessments must follow the current version of this guideline document.
- Gasoline Station Health Risk Assessments: Form -25T. All health risk assessments for gas stations must be accompanied by this completed form and follow the current version of the form.
Air Toxics Forms
Air Toxics Calculations
- Prioritization Calculation Score Spreadsheet: SBCAPCD Prioritization Calculation Spreadsheet. Use this spreadsheet to determine stationary-source wide prioritization scores, as documented in the SBCAPCD Prioritization Guideline Document.
- SBCAPCD-Approved Emission Factors for Toxic Air Contaminants: TAC Emission Factors Spreadsheet. Use this spreadsheet and the District’s Approved Emission Factors for Toxic Air Contaminants to determine the appropriate emission factors and calculation methodology for various source types.
Performing Health Risk Assessments
- The HARP modeling program can be obtained from CARB’s website.
- District-approved meteorological data for use in AERMOD are available on the District’s Meteorological Data webpage.
- US EPA: Hazardous Air Pollutants/Unified Air Toxics WebSite. Basic facts, pollutants and sources, technical resources.
- US EPA: Unified Air Toxics WebSite Health Effects Notebook for Hazardous Air Pollutants. Fact sheets and additional information on effects on human health of substances that are defined as hazardous by the 1990 amendments of the Clean Air Act.
- California Air Resources Board Air Toxics Program. General Information on state’s air toxics program.
- California Air Resources Board Air Toxics Program Current Activities. Newly identified pollutants, control measures and other current activities.
- California Air Resources Board Consolidated Table of OEHHA/ARB Approved Risk Assessment Values. Look-up table of all cancer potency values and noncancer acute, 8-hour, and chronic Reference Exposure Levels (RELs) that are available for use in the AB 2588 Air Toxics “Hot Spots” Program.
- Office of Environmental Health Hazard Assessment. OEHHA is responsible for conducting health risk assessments of chemical contaminants in air and developing risk assessment guidance.
- “Hot Spots” Fee Table and Flow Chart. Use this link to determine a facility’s state fee. Annual state fees are based on risk and size of the facility. “Hot Spots” fee categories, complexities, fee amounts, and description of each risk category are shown on this link.
- California Air Toxic Emission Factors (CATEF) Search. Use ARB’s database to search for air toxic emission factors.
For downloading instructions, see How to View and Download Documents.
For more information or assistance, please contact David Harris at (805) 961-8824 or at [email protected] (Air Toxics Section).