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VOC and NO x Rules Related to the Oil and Natural Gas Industries

VOC and NO x Rules Related to the Oil and Natural Gas Industries. Bob Gifford Air Quality Specialist, Air Quality Division Presented to Environmental Trade Fair 2013. Air Quality Division . Overview.

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VOC and NO x Rules Related to the Oil and Natural Gas Industries

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  1. VOC and NOx RulesRelated to the Oil and Natural Gas Industries Bob GiffordAir Quality Specialist, Air Quality Division Presented to Environmental Trade Fair 2013 Air Quality Division

  2. Overview • Control strategies reduce ozone by limiting volatile organic compounds (VOC) and nitrogen oxides (NOx) emissions from stationary sources. • Rules in Title 30 Texas Administrative Code • Chapters 115 (VOC) and 117 (NOx) • Rules affecting oil and gas (O&G) production and gas processing sites limit VOC and NOx emissions from: • water separators; • liquid loading; • dehydrators; • storage tanks; • gas processing equipment; • cleaning solvents; • heaters; and • engines.

  3. Water Separators Dallas – Fort Worth (DFW) Area: Chapter 115, Subchapter B, Division 3, §115.132 El Paso County Control to 0.5 pounds per square inch (psia) vapor pressure or less if emissions are over 100 pounds/day Beaumont – Port Arthur (BPA) Area Houston-Galveston-Brazoria (HGB) Area

  4. Liquid Loading and Transport Vessels DFW Chapter 115, Subchapter C, Division 1, §115.212 Control by 90% or vapor balance if loading over 20,000 gallons/day BPA HGB

  5. Storage Tanks Chapter 115, Subchapter B, Division 1, §115.112 90% control of crude oil and condensate tanks in HGB 95% in DFW

  6. Gas Dehydrators Chapter 115, Subchapter B, Division 2, §115.122 Control by 90% or to 20 parts per million by volume (ppmv) if emissions are over 100 pounds/day

  7. Vents at Gas Processing Plants Chapter 115, Subchapter B, Division 2, §115.122 Control by 90% or to 20 ppmv if emissions are over 100 pounds/day If not regulated by another rule in Chapter 115

  8. Leak Repair at Gas Processing Plants Chapter 115, Subchapter D, Division 3, Rules apply if over 250 components contact material over 1.0% VOC by weight Scheduled inspections: weekly to yearly Repair schedule: from one day to next shutdown depending on ability to repair while on-line

  9. Production, Compressor, & Gas Processing NOx Regulations Nonattainment Area Minor Sources • Gas-fired boilers and heaters over 2 million British thermal units (MMBtu) per hour • 0.036 lb NOx/MMBtu • §117.2010 HGB, if less than 25 tons per year (tpy) NOx • Gas-fired engines rated 50 horsepower (hp) or more • 0.5 to 0.7 grams NOx per horsepower-hour (g NOx/hp-hr) depending on design and install date • §117.2010 HGB • §117.2110 DFW (less than 50 tpy NOx) • Diesel engines rated 50 hp or more • 2.8 to 11.0 g NOx/hp-hr depending on size, location, and install date • §117.2010 HGB, §117.2110 DFW

  10. Production, Compressor, & Gas Processing NOx Regulations Nonattainment Area Major Sources • Boilers and Heaters • 0.020 to 0.10 lb NOx/MMBtu depending on design and location • §117.110 BPA (50 tpy NOx or more) • §117.310 HGB, and §117.410 DFW • Gas-fired engines rated 50 hp or more • 0.5 to 2.0 g NOx/hp-hr depending on design, size, and location • §117.310 and §117.410 • Diesel engines • 2.8 to 11.0 g NOx/hp-hr depending on size and location • §117.310 and §117.410

  11. Statewide NOx Regulations • Chapter 117, Subchapter E, Division 3 • Gas-fired heaters rated 0.4 to 2 MMBtu/hr • 0.037 lbNOx/MMBtu • §117.3205

  12. East Texas Engines Chapter 117, Subchapter E, Division 4, §117.3310 33 East Texas Counties

  13. East Texas Engines NOx Regulations • Gas-fired rich-burn engines • 240 to 499 hp • 1.0 g NOx/hp-hr • §117.3310 • 500 hp or more • 0.5 g NOx/hp-hr • §117.3310

  14. Storage Tank Rule • Revisions to 30 Texas Administrative Code Chapter 115, Subchapter B, Division 1 • New rules in the DFW area • Require controls on crude oil and condensate tanks prior to custody transfer (upstream) • Require 95% control of VOC emissions • Restrictions on floating roof tanks • Compliance date March 1, 2013

  15. Crude Oil and Condensate • Anticipated controls • Vapor recovery unit • Larger sources • Economical • Flare • Smaller sources • Must meet 40 Code of Federal Regulations §60.18 • Many sources already controlled • Testing required for controls • Efficiency demonstration • Flare design verification

  16. Crude Oil and Condensate • Produced water tanks • Applicability explicitly based on condensate rather than liquid throughput in the tank • Vaporizes as if all condensate • Only applies prior to custody transfer

  17. Industrial Cleaning Solvents New rules in Chapter 115, Subchapter E, Division 6 Compliance required by March 1, 2013

  18. Industrial Cleaning Solvents • Applies to solvent cleaning operations on a property with at least 3.0 tpy of cleaning solvent VOC emissions • Does not apply to residential or janitorial cleaning • Solvent cleaning operations that are subject to or in compliance with another Chapter 115 regulation are exempt from Division 6 • Control options: • 0.42 pound of VOC per gallon of solution • 8.0 millimeters of mercury vapor pressure • 85% overall control efficiency

  19. Contact Bob Gifford Bob.Gifford@tceq.texas.gov 512-239-3149

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