(a) The definitions in this section are specific to this Part. Additional definitions applying to this Part and other Parts in this Chapter are found in section 200.1.

1. (1) materials handling systems, including, but not limited to systems for handling iron ore, ore pellets, coal, limestone, fluxes, scrap steel sinter, coke, steel alloying ingredients, slag and dust;
2. (2) blast furnaces for making iron;
3. (3) sintering processes such as agglomeration including sintering and handling of agglomerated materials, but excluding iron-ore beneficiating processes and processes occurring prior to iron-ore agglomeration such as washing, screening, crushing, blending and materials handling;
4. (4) basic oxygen furnaces open hearths and electric furnaces;
5. (5) iron and/or steel furnaces, except furnaces in jobbing foundries;
6. (6) molten material transfer and processing operations, including but not limited to teeming, tapping, reladling and casting;
7. (7) continuous casting operations;
8. (8) scarfing and other surface defect removal operations, except those in jobbing foundries;
9. (9) scrap preparation, including scrap melting and burning operations;
10. (10) molten metal desulfurization operations;
11. (11) raw material drying systems; and

12. (12) process furnaces, including soaking pits, annealing furnaces, reheating furnaces and other process furnaces using direct heat transfer.

    (f) Lancing.

    The process whereby oxygen is blown into a charged basic oxygen furnace vessel.

    (g) Lower Orange County metropolitan area.

    The area including the towns of Blooming Grove, Chester, Highlands, Monroe, Tuxedo, Warwick, and Woodbury.

    (h) New York City metropolitan area.

    All of the city of New York, and Nassau, Suffolk, Westchester and Rockland Counties.

    (i) Potential to emit.

    The maximum capacity of an air contamination source to emit any air contaminant under its physical and operational design. Any physical or operational limitation on the capacity of the facility or air contamination source to emit any air contaminant, including air pollution control equipment and/or restriction on the hours of operation, or on the type or amount of material combusted, stored, or processed, shall be treated as part of the design only if the limitation is contained in enforceable permit conditions. Fugitive emissions, to the extent that they are quantifiable, are included in determining the potential to emit.

    (j) Reasonably available control technology (RACT).

    Lowest emission limit that a particular source is capable of meeting by application of control technology that is reasonably available, considering technological and economic feasibility.

(b) Basic oxygen furnace tapping.

The process whereby molten steel is poured from a basic oxygen furnace vessel into a teeming ladle.

(c) Blast furnace tapping.

The process whereby molten iron and slag drain from a blast furnace tap hole.

(d) Fluxing.

The process whereby flux materials are added to a basic oxygen furnace vessel during lancing.

(e) Iron and/or steel processes.

Processes commonly associated with or necessary to production of iron and steel, excluding ferro alloys, including, but not limited to the following: