Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 98, Subpt. W, Tbl. W-1A Table W–1A to Subpart W of Part 98—Default Whole Gas Emission Factors for Onshore Petroleum and Natural Gas Production Facilities and Onshore Petroleum and Natural Gas Gathering and Boosting Facilities

Eastern U.S.

Population Emission Factors—All Components, Gas Service ¹

Valve

0.027

Connector

0.003

Open-ended Line

0.061

Pressure Relief Valve

0.040

Low Continuous Bleed Pneumatic Device Vents ²

1.39

High Continuous Bleed Pneumatic Device Vents ²

37.3

Intermittent Bleed Pneumatic Device Vents ²

13.5

Pneumatic Pumps ³

13.3

Population Emission Factors—All Components, Light Crude Service ⁴

Valve

0.05

Flange

0.003

Connector

0.007

Open-ended Line

0.05

Pump

0.01

Other ⁵

0.30

Population Emission Factors—All Components, Heavy Crude Service ⁶

Valve

0.0005

Flange

0.0009

Connector (other)

0.0003

Open-ended Line

0.006

Other ⁵

0.003

Population Emission Factors—Gathering Pipelines, by Material Type ⁷

Protected Steel

0.47

Unprotected Steel

16.59

Plastic/Composite

2.50

Cast Iron

27.60

Western U.S.

Population Emission Factors—All Components, Gas Service ¹

Valve

0.121

Connector

0.017

Open-ended Line

0.031

Pressure Relief Valve

0.193

Low Continuous Bleed Pneumatic Device Vents ²

1.39

High Continuous Bleed Pneumatic Device Vents ²

37.3

Intermittent Bleed Pneumatic Device Vents ²

13.5

Pneumatic Pumps ³

13.3

Population Emission Factors—All Components, Light Crude Service ⁴

Valve

0.05

Flange

0.003

Connector (other)

0.007

Open-ended Line

0.05

Pump

0.01

Other ⁵

0.30

Population Emission Factors—All Components, Heavy Crude Service ⁶

Valve

0.0005

Flange

0.0009

Connector (other)

0.0003

Open-ended Line

0.006

Other ⁵

0.003

Population Emission Factors—Gathering Pipelines by Material Type ⁷

Protected Steel

0.47

Unprotected Steel

16.59

Plastic/Composite

2.50

Cast Iron

27.60