§ 63.11588 What definitions apply to this subpart?

Chemical preparation means a target HAP-containing product, or intermediate used in the manufacture of other products, manufactured in a process operation described by the NAICS code 325998 if the operation manufactures target HAP-containing products or intermediates other than indelible ink, India ink, writing ink, and stamp pad ink. Indelible ink, India ink, writing ink, and stamp pad ink manufacturing operations are subject to regulation by the paints and allied products area source rule (40 CFR part 63, subpart CCCCCCC).

Chemical preparations facility means any facility-wide collection of chemical preparation operations.

Chemical preparations operation means the collection of mixing, blending, milling, and extruding equipment used to manufacture chemical preparations. A chemical preparation operation may include all, or only some, of the equipment listed above, depending on the chemical preparation being manufactured. Mixing and blending equipment may be used to process either wet or dry materials, or a combination of wet and dry materials. Milling equipment includes, but is not limited to, various types of rolling mills, rotary mills, and grinders. Extruding equipment, for the purposes of this subpart, includes direct and indirect extruders, spray driers, and prilling towers.