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Rules, Regulations & Plans

Rules, Regulations & Plans

The APCD is primarily responsible for managing local air quality by regulating emissions from stationary sources of air pollution. Standards for motor vehicle emissions are set by the California Air Resources Board (ARB), and apply uniformly statewide. The APCD Rules and Regulations are adopted by the Air Pollution Control Board and apply to the area and activities within the District.

The California Air Resources Board maintains a website that stores rules and regulations for all Districts throughout the state.

Click here to view all the SLO County APCD's Rules and Regulations.

Proposed Revision to Rule 105 

The District is proposing a revision to Rule 105, Definitions that will change the definition of Volatile Organic Compound (VOC).  Instead of listing over 45 compounds that are either excluded or exempted by the United States Environmental Protection Agency (USEPA), the proposed rule will reference the section of the Code of Federal Regulations that contains the current federal definition of VOC.

Each year the USEPA typically adds a few organic compounds to the list of compounds excluded as VOCs.  This list is constantly changing as a result of petitions and requests by industry and manufacturers who are trying to reformulate products and coatings in order to meet regulatory VOC limits.  Proposed compounds are analyzed for volatility and excluded if determined to have negligible photochemical reactivity.  Organic compounds to be excluded are duly noticed in the Federal Register and codified in Title 40, Part 51, Subpart F of the Code of Federal Regulations (40 CFR 51.100, Definitions).

This proposed change will eliminate the need to continually revise Rule 105 solely to update the list of excluded volatile organic compounds.  District Rule 105 was first adopted August 2, 1976 and has been revised ten times since then, with many revisions to the definition of VOC.  While the District tends to accept the federal definition of VOC for emission calculations and enforcement purposes, this change to reference the federal regulations will clarify the current exempt and excluded compounds.  The Code of Federal Regulations is typically revised yearly in the month of July.

Click here to view the full text of the proposed change to Rule 105.  Underlined text indicates additions to the existing rule and strikeout text indicates deletions.  Subsection A.87 includes the revised definition of Volatile Organic Compound (VOC). Click here to view the public notice distributed on October 13, 2013. 

The proposed change will be discussed at the next APCD Board Meeting on November 13, 2013, at 9:00am in the Board of Supervisors Chambers in the COunty Government Center. 

Land Use and CEQA

Clean Air Plan

As part of the California Clean Air Act, the APCD is required to develop a plan to achieve and maintain the state ozone standard by the earliest practicable date. The Clean Air Plan (CAP) outlines the District's strategies to reduce ozone precursor emissions from a wide variety of stationary and mobile sources. The 2001 CAP was adopted by the Air Pollution Control Board at their hearing on March 26, 2002. The 2001 CAP is available for download either as the entire document or broken into individual chapters.

Document Format
2001 Clean Air Plan (6,403 kb) PDF
Cover, Table of Contents, etc. PDF
Executive Summary PDF
Chapter 1: Introduction PDF
Chapter 2: Planning Area and Air Basin Description PDF
Chapter 3: Existing Air Quality PDF
Chapter 4: 1991 Reference Year Emissions Inventory PDF
Chapter 5: Stationary Source Control Program PDF
Chapter 6: Transportation and Land Use Management Strategies PDF
Chapter 7: Emission Forecasts PDF
Chapter 8: Plan Implementation PDF
Chapter 9: Public Information and Education PDF
Appendix A: Baseyear Emissions Inventory Request
Appendix B: Forecast Emissions Inventory Request
Appendix C: Stationary Source Control Measures Request
Appendix D: Transportation Control Measures PDF
Appendix E: Land Use and Circulation Management Strategies PDF

A hard copy of the 2001 CAP and/or the Appendices is available upon request to the District.

PM Report

In 2003, the California Legislature enacted Senate Bill 656 (Sher), to reduce public exposure to particulate matter (PM10 and PM2.5 collectively referred to as PM). SB 656 required the California Air Resource Board (ARB) in consultation with local air pollution control districts, to develop and adopt a list of PM reduction strategies.

San Luis Obispo County Air Pollution Control District Board adopted the PM Report and associated control measures in July 2005.

San Luis Obispo County APCD CEQA Tools

CEQA Handbook and Associated Tools: The California Environmental Quality Act (CEQA) was created to ensure that environmental impacts from new development are addressed and adequately mitigated. The District's CEQA Handbook provides information on the District's significance thresholds for determining potential air quality impacts from proposed residential and commercial development and provides recommendations on the level of mitigation necessary to reduce those impacts. Appendix A to the CEQA Handbook outlines the building permit requirements for facilities potentially subject to air district permitting. The CEQA Handbook was last updated on April 2012. The CEQA Handbook and tools listed below are intended to assist with CEQA reviews.

CalEEMod Model: The California Emission Estimator Model (CalEEMod) is the emissions estimation model the District recommends using for landuse project. The model is free and available for download from the link below. The most recent verison of the model should be used.

Health Risk Assessment: Screening level health risk assessments (HRA) may be required as part of the CEQA review process. A tool is available to assist with this screening. The tool and instruction on how to use the tool are listed below. Please note this tool is intended for screening only. A more detail assessment maybe required depending upon the results from the screening tool.

California Air Pollution Control Officers Association (CAPCOA)

ARB's Air Quality and Land Use Handbook

ARB's Air Quality and Land Use Handbook: As part of the Air Resources Board's (ARB) Community Health Program, they have developed an Air Quality and Land Use Handbook (Handbook) which is intended to serve as a general reference guide for evaluating and reducing air pollution impacts associated with new projects that go through the land use decision-making process. More arrows.gif

ADAM Air Quality Data Statistics

ADAM Air Quality Data Statistics all user to select and view air quality data for various pollutants throughout the State, including trend summaries, days above the standard, daily stats, 24-hour stats, etc.