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Greenhouse Gas Emissions

Stakeholder Workshop on EPA GHG Data on Petroleum and Natural Gas Systems

On November 19, 2015, EPA held a stakeholder workshop on greenhouse gas (GHG) data on petroleum and natural gas systems from the Greenhouse Gas Reporting Program (GHGRP) and Inventory of U.S. Greenhouse Gas Emissions and Sinks (GHG Inventory). At the workshop, EPA presented information on 2014 GHGRP data (including newly available activity data). EPA presented existing GHG Inventory methods and planned improvements under consideration based on previous stakeholder comments and data from the GHGRP and external studies. In addition, stakeholders presented information on new and upcoming data and analyses related to GHG data on petroleum and natural gas systems.

View the workshop summary and presentations.

Workshop Proceedings

  • Welcome and Opening Remarks
  • Background on GHG Inventory and GHGRP 
    • Melissa Weitz, EPA, Overview of GHG Inventory
    • Alexis McKittrick, EPA, Overview of GHGRP
  • ​​Distribution Segment 
    • Natalie Tang, ORISE, 2014 GHGRP Subpart W Distribution Segment Data
    • Casey Pickering, ERG, GHG Inventory-Distribution Segment
    • Brian Jones, MJ Bradley & Associates, Improvements to the Distribution Segment Methodology
    • Pam Lacey, AGA, The Case for Including WSU Distribution Data in the Inventory
    • Discussion
  • Transmission and Storage Segment
    • Alexis McKittrick, EPA, 2014 GHGRP Subpart W Transmission and Storage Segment Data
    • Melissa Weitz, EPA, GHG Inventory-Transmission and Storage Segment
    • R. Subramanian, CMU, Methane Emissions from Transmission & Storage Compressor Stations: Evaluation of the GHGRP
    • Dan Zimmerle, CSU, National Modeling of Transmission and Storage Emissions
    • Discussion
  • Processing Segment
    • Mark de Figueiredo, EPA, 2014 GHGRP Subpart W Processing Segment Data
    • Casey Pickering, ERG, GHG Inventory-Processing Segment
    • Terri Shires, AECOM, ProcessingEquipment Leaks
    • Anthony Marchese, CSU, Methane Emissions from U.S. Gathering Facilities and Processing Plants
    • Discussion
  • Production Segment
    • Alexis McKittrick, EPA, 2014 GHGRP Subpart W Production Segment Data
    • Melissa Weitz, EPA, GHG Inventory-Production Segment
    • Terri Shires, AECOM, Onshore Oil and Gas ProductionLiquids Unloading
    • Terri Shires, AECOM, Onshore Oil and Gas ProductionPneumatic Controllers
    • Mark Omara, CMU, Comparison of Facility-Level Methane Emission Rates from Natural Gas Production Well Pads in the Marcellus, Denver-Julesburg, and Uintah Basins
    • Discussion
  • Upcoming Studies, Other Analyses
    • Garvin Heath, NREL, NG Methane Emissions in the GHG Inventory: Sources, Uncertainties, and Opportunities for Improvement
    • David Lyon, EDF, Reconciling Region, Facility, and Component-Level Emissions Data
    • Jennifer Snyder, EPA, CAP/HAP National Emission Inventory Development2014 NEI Plans for the Oil & Gas Sector
    • Tom Moore, WESTAR, Applying Subpart W Reporting Information in the Greater San Juan Basin O&G Emission Inventory
  • Discussion and Closing Remarks

For more information on the workshop, please contact ghginventory@epa.gov.

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