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AP-42 Emission Factors for VOCs from Flares Updated

The United States Environment Protection Agency (US EPA) has updated Sections 5.1, 8.13, and 13.5 of AP-42 to incorporate the following new and revised emissions factors.

  • Flares – VOC, CO (revised)
  • Sulphur Recovery Units: NOx, CO, THC
  • Catalytic Reforming Units: THC
  • Hydrogen Plants: NOx
  • Fluid Catalytic Cracking Units: HCN

The revisions and supporting documentation can be accessed here.

This update follows a settlement agreement reached between the EPA and plaintiffs in Air Alliance Houston et al. v EPA Case No. 15-1210 (D.C. Cir.).

[Source: US EPA]