The plan applies to existing facilities at the following sulfuric acid plants:

(a) Sulfur-burning plants operated by:

(1) Texasgulf Inc. in Beaufort County,

(2) Swift Agricultural Chemical Company in Brunswick County,

(3) USS Agri-Chemicals in Brunswick County,

(4) Wright Chemical Corporation in Columbus County, and

(5) Northeast Chemical Company in New Hanover County.

(b) There are no oleum plants.

(c) There are no bound sulfur feedstock plants.