R 336.1120 Definitions; T.

Rule 120. As used in these rules: (a) "Temporary source" means a stationary source, process, or process equipment that commences operation and is located at a geographic site for not more than 12 consecutive months. (b) "Texture coat" means a coating that is applied to a plastic part which, in its finished form, consists of discrete raised spots of the coating. (c) "Thin particleboard" means a manufactured board that is 1/4 of an inch or less in thickness and is made of individual wood particles that have been coated with a binder and formed into flat sheets by pressure. (d) "Thinning tank," as it pertains to R 336.1631, means any vessel that receives resin from a reactor and to which solvents or other materials are added to thin the resin. (e) "Tileboard" means paneling that has a colored, waterproof surface coating. (f) "Toxic air contaminant" means any air contaminant for which there is no national ambient air quality standard and is or may become harmful to public health or the environment when present in the outdoor atmosphere in sufficient quantities and duration. For the purpose of this definition, the following substances are not considered toxic air contaminants: (i) Acetylene. (ii) Animal or plant materials, including extracts and concentrates thereof, used as ingredients in food products or dietary supplements in accordance with applicable regulations of the United States Food and Drug Administration. (iii) Argon. (iv) Calcium carbonate. (v) Calcium hydroxide. (vi) Calcium oxide. (vii) Calcium silicate. (viii) Calcium sulfate. (ix) Carbon dioxide. (x) Carbon monoxide. (xi) Cellulose. (xii) Crystalline silica emissions from any of the following processes: (A) Extraction and processing of all metallic or non-metallic minerals. (B) Sand production, processing, and drying. (C) Asphalt production. (D) Concrete production. (E) Glass and fiberglass manufacturing. (F) Foundries. (G) Foundry residual recovery activities. (xiii) Dipropylene glycol (xiv) Emery (corundite). (xv) Ethane. (xivi) Graphite (synthetic). (xvii) Grain dust. (xvii) Helium. (xix) Hydrogen. (xx) Iron oxide. (xxi) Lead. (xxii) Liquefied petroleum gas (l.p.g.). (xxiii) Methane. (xxiv) Neon. (xxv) Nitrogen. (xxvi) Nitrogen oxides. (xxvii) Oxygen. (xxviii) Ozone. (xxix) Perlite. (xxx) Portland cement. (xxxi) Propane. (xxxii) Propylene glycol. (xxxiii) Silicon. (xxxiv) Starch. (xxxv) Sucrose. (xxxvi) Sulfur dioxide. (xxxvii) Vegetable oil mist. (xxxviii) Water vapor. (xxxix) Zinc metal dust. (g) "Toxicological interaction" means the simultaneous exposure to 2 or more hazardous substances that together produce a toxicological response that is greater or less than what their individual responses would be. (h) "Transfer efficiency" means the percentage of coating solids material that leaves the coating applicator and remains on the surface of the product. (i) "True vapor pressure" means the equilibrium partial pressure exerted by a liquid or the sum of partial pressures exerted by a mixture of liquids. For refined petroleum stock, such as gasolines and naphthas, and crude oil, the true vapor pressure may be determined in accordance with methods described in American petroleum institute MPMS C19 S2, "Manual of Petroleum Measurement Standards, Chapter 19, Evaporative Loss Measurements, Section 2, Evaporative Loss from Floating-roof Tanks," adopted by reference in R 336.1902.