The 1990 Clean Air Act (CAA) directs the U.S. Environmental Protection Agency (EPA) to regulate emissions into the air of the following 188 toxic chemicals. These chemicals, called Hazardous Air Pollutants (HAPs), are known or suspected carcinogens, and have high usage and emissions in a wide variety of industries, including printing, metal fabrication, autobody repair, automotive repair, wood finishing, dry cleaning and others.

Consequently, the EPA has determined that emissions of these chemicals present a threat to human health or the environment. As an owner or operator of equipment that uses products that contain chemicals, it is your responsibility to determine if your company uses any of the 188 regulated chemicals and whether you are required to adhere to strict controls.

The list of 188 toxic chemicals, called Hazardous Air Pollutants (HAPs), as stated in the 1990 Clean Air Act (CAA).

NOTE: For all listings above that contain the word "compounds" and for glycol ethers, the following applies: unless otherwise specified, these listings are defined as including any unique chemical substance that contains the named chemical (i.e., antimony, arsenic, etc.) as part of that chemical's infrastructure.

1. X'CN where X=H' or any other group where a formal dissociation may occur. For example, KCN or Ca(CN)2
   
2. Includes mono- and di- ethers of ethylene glycol, diethylene glycol, and triethylene glycol R-(OCH2CH2)n-OR' where n=1, 2, or 3: R=alkyl or aryl groups; R'=R, H, or groups which, when removed, yield glycol ethers with the structure: R-(OCH2CH)n-OH. Polymers are excluded from the glycol category.
3. Includes glass, rock, or slag fibers (or other mineral derived fibers) of average diameter 1 micrometer or less.
4. Includes organic compounds with more than one benzene ring, and which have a boiling point greater than or equal to 100�C.

5. A type of atom which spontaneously undergoes radioactive decay.

This fact sheet is intended for general reference only; it is not a complete statement of the technical or legal requirements associated with this regulation. December 1996

For more information, visit the following pages in the VA SBAP web site:

• Federal Air Regulations & Guidance Materials By Topic: National Emission Standards for Hazardous Air Pollutants section
• Federal Air Regulations & Guidance Materials By Topic: National Emission Standards for Hazardous Air Pollutants for Source Categories or Maximum Achievable Control Technology section

SOURCE:
Pacific Northwest Pollution Prevention Res. Cntr, 1326 Fifth Ave, Suite 650, Seattle, WA 98101, Phone: (206) 223-1151, Fax: (206) 223-1165