Environmental Engineering FOURTH EDITION

416 ENVIRONMENTAL ENGINEERING

Waste oil combustion

Gasoline marketing

Glass manufacturing

Each “major source,” as defined by the 10 or 25 todyear limit, must achieve a maxi-
mum achievable control technology (MACT) for emissions. On a case-by-case basis,
an SIP could require a facility to install control equipment, change an industrial or
commercial process, substitute materials in the production process, change work prac-
tices, and train and certify operators and workers. The MACT requirements continue
to impact air pollution sources as the Clean Air Act is implemented.
Under Section 112 of the Clean Air Act, EPA has the authority to set national
emission, or performance, standards for hazardous air pollutants (NESHAPS) for all
sources of those pollutants. The new Clean Air Act required that EPA develop a “list
of substances” to be regulated. Substances can be added to the list and removed from
the list as a result of ongoing research. The list currently contains about 170 pollutants.
Some of the compounds included are shown in Table 21-3. Some of these compounds
are commonly used substances, e.g., ethylene glycol (anti-freeze), styrene (a plastic
constituent), and methanol (“wood alcohol”).

Table 21-3. Partial List of Regulated Hazardous Substances

Dichloroethane

Ethylene glycol

Ethylene imine (Aziridine)

Ethylene oxide

Ethylene thiourea

Ethylidene dichloride

Formaldehyde

Heptachlor

Hexachlorobenzene

Hexachlorobutadiene

HexachIoroc yclopentadiene

Hexane

Hydrazine

Hydrochloric acid

Hydrogen fluoride

(hydrofluoric acid)

Hydroquinone

Lindane (all isomers)

Methanol

( 1,l -dichloroethane)

Phosgene

Phosphine

Phosphorus

Phthalic anhydride

Polychlorinated biphenyls

Quinoline

Quinone

Styrene

Tetrachloroethylene

Toluene

Toxaphene (chlorinated camphene)

1,2,4Trichlorobenzene

Trichloroethylene

2,4,5-Trichlorophenol

Vinyl acetate

Vinyl bromide

Vinyl chloride

Vinylidene chloride

(perchloroethylene)

( 1,l -dichloroethylene)

(continued)