Final answer:
NESHAP sets regulations for emissions from auto shops, including the use of specific solvents in dry-cleaning and fire extinguisher systems. These shops must also adhere to the SO2 standards and the requirements of the State Implementation Plan for maintaining air quality.
Step-by-step explanation:
The National Emissions Standards for Hazardous Air Pollutants (NESHAP) are regulations designed to control emissions from various sources, including auto shops. Auto shops must comply with NESHAP regulations, which could include specific solvent requirements to reduce the emission of hazardous air pollutants.
For example, auto shops may be required to use solvents for dry-cleaning or in fire extinguisher systems. However, some chemicals historically used for these purposes, such as certain halogenated solvents, are no longer recommended due to environmental and health concerns. Furthermore, shops must comply with the State Implementation Plan (SIP), which outlines how an area will attain or maintain compliance with the National Ambient Air Quality Standards (NAAQS).
Under the Clean Air Act, there are also specific standards for SO2 (sulfur dioxide), such as the 0.14 ppm 24-hour and 0.03 ppm annual limits, which must be adhered to by the shops, depending on the designated area and the status of SIP approval or nonattainment.