Section 115.121 - Emission Specifications(a) For all persons in the Beaumont-Port Arthur, Dallas-Fort Worth, El Paso, and Houston-Galveston-Brazoria areas, as defined in § 115.10 of this title (relating to Definitions), the following emission specifications shall apply. (1) No person may allow a vent gas stream containing volatile organic compounds (VOC) to be emitted from any process vent, unless the vent gas stream is controlled properly in accordance with § 115.122(a)(1) of this title (relating to Control Requirements). Vent gas streams include emissions from compressor rod packing that are contained and routed through a vent, except from compressors subject to Division 7 of this subchapter (relating to Oil and Natural Gas in Ozone Nonattainment Areas), and emissions from a glycol dehydrator still vent.(2) No person may allow a vent gas stream to be emitted from the following processes unless the vent gas stream is controlled properly in accordance with § 115.122(a)(2) of this title: (A) any synthetic organic chemical manufacturing industry reactor process or distillation operation;(B) any air oxidation synthetic organic chemical manufacturing process;(C) any liquid phase polypropylene manufacturing process;(D) any liquid phase slurry high-density polyethylene manufacturing process; or(E) any continuous polystyrene manufacturing process.(3) In the Dallas-Fort Worth, El Paso, and Houston-Galveston-Brazoria areas, VOC emissions from bakery ovens, as defined in § 115.10 of this title, shall be controlled properly in accordance with § 115.122(a)(3) of this title.(4) Any vent gas stream in the Houston-Galveston-Brazoria area which includes a highly-reactive volatile organic compound, as defined in § 115.10 of this title, is subject to the requirements of Subchapter H of this chapter (relating to Highly-Reactive Volatile Organic Compounds) in addition to the applicable requirements of this division.(b) In Nueces and Victoria Counties, no person may allow a vent gas stream to be emitted from any process vent containing one or more of the following VOC or classes of VOC, unless the vent gas stream is controlled properly in accordance with § 115.122(b) of this title:(1) emissions of ethylene associated with the formation, handling, and storage of solidified low-density polyethylene;(2) emissions of the following specific VOC: ethylene, butadiene, isobutylene, styrene, isoprene, propylene, methylstyrene; and(3) emissions of specified classes of VOC, including aldehydes, alcohols, aromatics, ethers, olefins, peroxides, amines, acids, esters, ketones, sulfides, and branched chain hydrocarbons (C8 and above).(c) For persons in Aransas, Bexar, Calhoun, Matagorda, San Patricio, and Travis Counties, the following emission specifications shall apply. (1) No person may allow a vent gas stream to be emitted from any process vent containing one or more of the following VOC or classes of VOC, unless the vent gas stream is controlled properly in accordance with § 115.122(c)(1) of this title: (A) emissions of ethylene associated with the formation, handling, and storage of solidified low-density polyethylene;(B) emissions of the following specific VOC: ethylene, butadiene, isobutylene, styrene, isoprene, propylene, and methylstyrene; and(C) emissions of specified classes of VOC, including aldehydes, alcohols, aromatics, ethers, olefins, peroxides, amines, acids, esters, ketones, sulfides, and branched chain hydrocarbons (C8 and above).(2) No person may allow a vent gas stream to be emitted from any catalyst regeneration of a petroleum or chemical process system, basic oxygen furnace, or fluid coking unit into the atmosphere, unless the vent gas stream is properly controlled in accordance with § 115.122(c)(2) of this title.(3) No person may allow a vent gas stream to be emitted from any iron cupola into the atmosphere, unless the vent gas stream is properly controlled in accordance with § 115.122(c)(3) of this title.(4) Vent gas streams from blast furnaces shall be controlled properly in accordance with § 115.122(c)(4) of this title.30 Tex. Admin. Code § 115.121
The provisions of this §115.121 adopted to be effective February 19, 1990, 15 TexReg 549; amended to be effective August 1, 1992, 17 TexReg 4683; amended to be effective December 3, 1993, 18 TexReg 8538; amended to be effective May 27, 1994, 19 TexReg 3703; amended to be effective January 27, 1995, 20 TexReg 221; amended to be effective March 7, 1996, 21 TexReg 1548; amended to be effective May 22, 1997, 22 TexReg 4213; amended to be effective January 17, 2003, 28 TexReg 113; Amended by Texas Register, Volume 40, Number 25, June 19, 2015, TexReg 3941, eff. 6/25/2015; Amended by Texas Register, Volume 46, Number 29, July 16, 2021, TexReg 4344, eff. 7/21/2021