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

- 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

Link to an amendment published at 89 FR 42323, May 14, 2024.

Onshore petroleum and natural gas production and Onshore petroleum and natural gas gathering and boosting	Emission factor (scf/hour/component)	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

1 For multi-phase flow that includes gas, use the gas service emissions factors.

2 Emission Factor is in units of “scf/hour/device.”

3 Emission Factor is in units of “scf/hour/pump.”

4 Hydrocarbon liquids greater than or equal to 20°API are considered “light crude.”

5 “Others” category includes instruments, loading arms, pressure relief valves, stuffing boxes, compressor seals, dump lever arms, and vents.

6 Hydrocarbon liquids less than 20°API are considered “heavy crude.”

7 Emission factors are in units of “scf/hour/mile of pipeline.”

[80 FR 64297, Oct. 22, 2015]