Clean Air Act CAA 42 U.S. Code 7401 et seq

To satisfy tiie CAA requirements, states and state air eontrol boards are required to implement regulations and develop state implementation plans (SIP). Criteria pollutants (e.g., ozone, oxides of nilrogen, earbon monoxide) are regulated with National Ambient Air Quality Standards (NAAQS) and hazardous air pollutants (HAP), such as hexane, with National Emissions Standards for Hazardous Air Pollutants (NESHAP). 

The NAAQS are set at levels sufficient to protect public health (primary air quality standards) and welfare (secondary air quality standards welfare effects include wildlife, visibility, climate, damage to and deterioration of property and effects on economic value and on personal comfort and well being) from any known or anticipated adverse effect of the pollutant with an adequate (appropriate) margin of safety. The 1990 CAA expanded the list of HAP to 188, including hexane, and more strictly regulates nonattainment areas for 

NAAQS Volatile organic compounds (VOC) are essentially considered the same as the criteria pollutant ozone. VOCs are very broadly defined by the U.S. EPA (40 CFR 51.100) any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, that participates in atmospheric photochemical reactions. This includes any organic compound other than those specifically listed as having been determined to have negligible photochemical reactivity. Reactive VOCs are essentially all fiiose judged to be clearly more reactive than ethane - the most reactive member of the neghgibly reactive class. C4 - paraffins are of relatively 

Hazardous air pollutants (HAP) or air toxics. If a facility is a major emitter of any of the chemicals on the CAA list of HAPs, EPA requires sources to meet emissions standards. n-Hexane is on the HAP list but isohexane, acetone and other solvents listed in Table 14.10.4 are not. 

There are also variable emission requirements depending on the oilseed for allowable emissions for solvent extraetion for vegetable oil produetion in Europe. 

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Clean Air Act (CAA) (42 U.S. Code 7401 et seq.) To protect the pubhc health and welfare. Provides EPA with the authority to set NAAQS, to control emissions from new stationary sources, and to control HAP. 

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