5

Notes:

aDecreasing order. bListed as botanicals.

cIncludes research and development, animal sources, and biological products.

Notes:

aDecreasing order. bListed as botanicals.

cIncludes research and development, animal sources, and biological products.

previous EPA air toxic programs (40 CFR Part 63). For example, one major portion of the rule applies to sources that produce any of the 396 SOCMI products (see Table

5.3.2) that use any of the 112 organic HAPs (see Table

5.3.3) either in a product or as an intermediate or reac-tant. An additional 37 HAPs are regulated under another part of the HON (40 CFR Part 63). The HON lists 189 HAPs regulated under the air toxic program.

The focus of this rule is the SOCMI. For purposes of the MACT standard, a SOCMI manufacturing plant is viewed as an assortment of equipment—process vents, storage tanks, transfer racks, and wastewater streams—all of which emit HAPs. The HON requires such plants to monitor and repair leaks to eliminate fugitive emissions and requires controls to reduce toxics coming from discrete emission points to minuscule concentrations. Table 5.3.4 summarizes the impacts of these emission sources.

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