Regulations Overview

gas beam pumpers

U.S. EPA 40 CFR Part 98 Subpart W

The Oil and Gas sector is impacted by the EPA's published rule Title 40 CFR Part 98, Subpart W in November of 2010. Title 40 revolves around topics pertaining to the protection of the environment and Part 98 states the laws regarding mandatory reporting of greenhouse gases (GHGs).

Subpart W, in particular, focuses on Petroleum and Natural Gas Systems. This rule pertains to facilitates both on and offshore.

For emissions detection, the rule allows the use of flowmeters (or other measuring instruments dependent on the individual component) for emission measurement.

The following segments of the petroleum and natural gas industry will be held under this rule:

  • Onshore petroleum and natural gas production
  • Offshore petroleum and natural gas production
  • Onshore natural gas processing plants
  • Onshore natural gas transmission compression
  • Underground natural gas storage
  • Liquefied natural gas (LNG) storage - Liquefied natural gas import and export equipment
  • Natural gas distribution

The emitted gases that must be reported are:

  • Carbon Dioxide (CO²) and methane (CH4) emissions from equipment leaks and vented emissions.
  • CO², CH4, and nitrous oxide (N²O) emissions from gas flares by following the requirements of subpart W.
  • CO², CH4, and N²O emissions from stationary and portable fuel combustion sources in onshore production industry segment following the requirements in subpart W.
  • CO², CH4, and N²O emissions from stationary combustion sources in the natural gas distribution industry segment following the requirements in subpart W.
  • CO², CH4, and N²O emissions from all other applicable stationary combustion sources following the requirements of 40 CFR Part 98, Subpart C (General Stationary Fuel Combustion Sources).

If you have questions about the use of Thermal Gas mass Flowmeters and compliance with 40 CFR Part 98, please click here for more information.

40 CFR Part 60, Subpart OOOO

NSPS for Natural Gas Production, Transmission, and Distribution

On August 16, 2012, this rule was published in the Federal Register and became final on October 15, 2012. It consolidates requirements related to VOCs and SO2 emissions previously contained in Subparts KKK and LLL (does not cover Methane or CO2).

The rule affects emission sources constructed, modified or reconstructed after the proposal date of August 23, 2011. The USEPA is the regulatory authority administering the regulation unless the rule is delegated to a state agency. In Texas, the TCEQ has delegation to administer the rule. Consult the rule text for details on compliance requirements.

Monitoring devices and any recorders used for this regulation shall be installed, calibrated, operated, and maintained in accordance with the manufacturer’s recommendations, instructions, and operating manuals. For a combustion control device where compliance will be based on the manufacturer’s performance testing requirements for a specific model combustor, a continuous monitoring device (having an accuracy of plus or minus 2% or better) shall be installed to measure gas flow rate at the inlet of the control device and a heat sensing monitoring device equipped with a continuous recorder shall be installed to indicate the continuous ignition of the pilot flame.

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