Section 115.122 - Control Requirements(a) For all persons in the Beaumont-Port Arthur, Dallas-Fort Worth, El Paso, and Houston-Galveston-Brazoria areas, the following control requirements shall apply. (1) Any vent gas streams affected by § 115.121(a)(1) of this title (relating to Emission Specifications) must be controlled properly with a control efficiency of at least 90% or to a volatile organic compound (VOC) concentration of no more than 20 parts per million by volume (ppmv) (on a dry basis corrected to 3.0% oxygen for combustion devices): (A) in a direct-flame incinerator at a temperature equal to or greater than 1,300 degrees Fahrenheit;(B) in a smokeless flare that is lit at all times when VOC vapors are routed to the flare; or(C) by any other vapor control system, as defined in § 115.10 of this title (relating to Definitions). A glycol dehydrator reboiler burning the vent stream from the still vent is a vapor control system.(2) Any vent gas streams affected by § 115.121(a)(2) of this title must be controlled properly with a control efficiency of at least 98% or to a VOC concentration of no more than 20 ppmv (on a dry basis corrected to 3.0% oxygen for combustion devices): (A) in a smokeless flare that is lit at all times when VOC vapors are routed to the flare; or(B) by any other vapor control system, as defined in § 115.10 of this title.(3) For the Dallas-Fort Worth, El Paso, and Houston-Galveston-Brazoria areas, VOC emissions from each bakery with a bakery oven vent gas stream(s) affected by § 115.121(a)(3) of this title shall be reduced as follows. (A) Each bakery in the Houston-Galveston-Brazoria area with a total weight of VOC emitted from all bakery ovens on the property, when uncontrolled, equal to or greater than 25 tons per calendar year shall ensure that the overall emission reduction from the uncontrolled VOC emission rate of the oven(s) is at least 80%.(B) Each bakery in the Dallas-Fort Worth area, except in Wise County, with a total weight of VOC emitted from all bakery ovens on the property, when uncontrolled, equal to or greater than 50 tons per calendar year, shall ensure that the overall emission reduction from the uncontrolled VOC emission rate of the oven(s) is at least 80%.(C) Each bakery in the Dallas-Fort Worth area with a total weight of VOC emitted from all bakery ovens on the property, when uncontrolled, equal to or greater than 25 tons per calendar year, but less than 50 tons per calendar year, shall reduce total VOC emissions by at least 30% from the bakery's 1990 emissions inventory in accordance with the schedule specified in § 115.129(d) of this title (relating to Counties and Compliance Schedules).(D) Each bakery in the El Paso area with a total weight of VOC emitted from all bakery ovens on the property, when uncontrolled, equal to or greater than 25 tons per calendar year shall reduce total VOC emissions by at least 30% from the bakery's 1990 emissions inventory in accordance with the schedule specified in § 115.129(e) of this title.(E) Emission reductions in the 30% to 90% range are not creditable under Chapter 101, Subchapter H, Division 1 of this title (relating to Emission Reduction Credit Program) for the following bakeries: (i) each bakery in the Houston-Galveston-Brazoria area with a total weight of VOC emitted from all bakery ovens on the property, when uncontrolled, equal to or greater than 25 tons per calendar year;(ii) each bakery in the Dallas-Fort Worth area with a total weight of VOC emitted from all bakery ovens on the property, when uncontrolled, equal to or greater than 50 tons per calendar year;(iii) each bakery in the El Paso area with a total weight of VOC emitted from all bakery ovens on the property, when uncontrolled, equal to or greater than 50 tons per calendar year.(4) Any vent gas stream that becomes subject to the provisions of paragraphs (1), (2), or (3) of this subsection by exceeding provisions of § 115.127(a) of this title (relating to Exemptions) shall remain subject to the provisions of this subsection, even if throughput or emissions later fall below the exemption limits unless and until emissions are reduced to no more than the controlled emissions level existing before implementation of the project by which throughput or emission rate was reduced to less than the applicable exemption limits in § 115.127(a) of this title; and:(A) the project by which throughput or emission rate was reduced is authorized by any permit or permit amendment or standard permit or permit by rule required by Chapter 116 or Chapter 106 of this title (relating to Control of Air Pollution by Permits for New Construction or Modification; and Permits by Rule). If a permit by rule is available for the project, compliance with this subsection must be maintained for 30 days after the filing of documentation of compliance with that permit by rule; or(B) if authorization by permit, permit amendment, standard permit, or permit by rule is not required for the project, the owner or operator has given the executive director 30 days' notice of the project in writing.(b) For all persons in Nueces and Victoria Counties, any vent gas streams affected by § 115.121(b) of this title must be controlled properly with a control efficiency of at least 90% or to a VOC concentration of no more than 20 ppmv (on a dry basis corrected to 3.0% oxygen for combustion devices): (1) in a direct-flame incinerator at a temperature equal to or greater than 1,300 degrees Fahrenheit;(2) in a smokeless flare that is lit at all times when VOC vapors are routed to the flare; or(3) by any other vapor control system, as defined in § 115.10 of this title.(c) For all persons in Aransas, Bexar, Calhoun, Matagorda, San Patricio, and Travis Counties, the following control requirements shall apply. (1) Any vent gas streams affected by § 115.121(c)(1) of this title must be controlled properly: (A) in a direct-flame incinerator at a temperature equal to or greater than 1,300 degrees Fahrenheit;(B) in a smokeless flare that is lit at all times when VOC vapors are routed to the flare; or(C) by any other vapor control system, as defined in § 115.10 of this title, with a control efficiency of at least 90% or to a VOC concentration of no more than 20 ppmv (on a dry basis corrected to 3.0% oxygen for combustion devices).(2) Any vent gas streams affected by § 115.121(c)(2) of this title must be controlled properly: (A) in a direct-flame incinerator or boiler at a temperature equal to or greater than 1,300 degrees Fahrenheit; or(B) by any other vapor control system, as defined in § 115.10 of this title, with a control efficiency of at least 90% or to a VOC concentration of no more than 20 ppmv (on a dry basis corrected to 3.0% oxygen for combustion devices).(3) Any vent gas streams affected by § 115.121(c)(3) of this title must be controlled properly: (A) at a temperature equal to or greater than 1,300 degrees Fahrenheit in an afterburner having a retention time of at least one-fourth of a second, and having a steady flame that is not affected by the cupola charge and relights automatically if extinguished; or(B) by any other vapor control system, as defined in § 115.10 of this title, with a control efficiency of at least 90% or to a VOC concentration of no more than 20 ppmv (on a dry basis corrected to 3.0% oxygen for combustion devices).(4) Any vent gas streams affected by § 115.121(c)(4) of this title must be controlled properly: (A) in a smokeless flare that is lit at all times when VOC vapors are routed to the flare or in a combustion device used in a heating process associated with the operation of a blast furnace; or(B) by any other vapor control system, as defined in § 115.10 of this title, with a control efficiency of at least 90% or to a VOC concentration of no more than 20 ppmv (on a dry basis corrected to 3.0% oxygen for combustion devices).30 Tex. Admin. Code § 115.122
The provisions of this §115.122 adopted to be effective February 19, 1990, 15 TexReg 549; amended to be effective July 17, 1991, 16 TexReg 3717; 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 March 21, 1999, 24 TexReg 1777; amended to be effective January 18,2001, 26TexReg 493; 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