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  • Purpose of Oil Pollution Prevention regulation

    What is the purpose of the Oil Pollution Prevention regulation? When oil spills into navigable waters or onto adjoining shorelines, it can have harmful impacts on the environment, human health, and economic activity. EPA issued the Oil Pollution Prevention regulation to prevent oil spills and to assure that oil facility…

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  • Was Jatropha analyzed for this final rule and, if so, what D-code applies?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The GHG emissions performance of a Jatropha-based pathway was not analyzed for the final rule because sufficient information was not available. Since EPA has not yet assigned a D code for this pathway, a producer cannot generate RINs…

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  • Under what conditions might a renewable fuel produced under an approved pathway in the RFS regulations qualify for use in Navy applications?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Background: The U.S. Navy is seeking to blend biofuels with fossil-based fuels, such as F-76 fuel, which are often used in Navy marine vessels. The Navy asked EPA for guidance on whether such biofuels would be treated as…

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  • Where can I download hourly emissions data from continuous monitoring?

    Hourly emissions data files are available from the Clean Air Markets Division of EPA, collected as part of 40 CFR Part 75. The download location has changed in February, 2023. The new location is https://campd.epa.gov/data/bulk-data-files . Once on this new site, use the menu (at the left) and the Keyword…

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  • Was Jatropha analyzed for this final rule and, if so, what D-code applies?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The GHG emissions performance of a Jatropha-based pathway was not analyzed for the final rule because sufficient information was not available. Since EPA has not yet assigned a D code for this pathway, a producer cannot generate RINs…

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  • How complete are the data in the National Emissions Inventory?

    While the goal of the National Emissions Inventory (NEI) program is to include all emissions data, there are always challenges meeting this goal. The answer about completeness of coverage of sources depends on the emissions sector and pollutant. In general, the criteria air pollutants and precursors (CAPs) are expected to…

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  • Where is more information available about emissions estimation methods used by the EPA?

    For criteria air pollutants and precursors as well as for hazardous air pollutants, the methods are described in the technical support document (TSD) for the latest National Emissions Inventory (NEI) available from the main NEI page . For greenhouse gas emissions, you can find greenhouse gas inventory methods from the…

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  • How do I determine what SCCs have changed between inventory years?

    These are available in the EIS (Reporting Code table) or public website: https://sor-scc-api.epa.gov/sccwebservices/sccsearch/ Filter on “last inventory year” to remove SCCs no longer active. If this column has a date in it, then the SCC has been retired as of that date. The “last updated date” (column J) indicates when…

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  • Where are the NAICS/ SIC and SCC codes changes that have been implemented for the 2017NEI?

    Please refer to the NEI webpage for 2017 documentation , and follow the link for Appendix 2 - 2017 NEI Plan Code Changes. That Excel file describes anticipated changes for the SCCs and NAICS and includes a helpful read me. I'll just note in the next NEI/EIS email that SCC…

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  • How are emissions trends compiled?

    For criteria air pollutants and precursors, the emissions trends are based on the triennial National Emissions Inventory data, with some interim year data included for non-triennial years. The methods and interim-year approaches are described on the “Development of Data” tab included with the data provided on the Air Pollutant Emissions…

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  • SPCC Training Materials for Production Sector

    Does EPA offer any Spill Prevention, Control, and Countermeasure (SPCC) training materials specifically for the production sector? Yes. EPA has developed a “train-the-trainer” presentation for the production sector. The presentation provides information for organizations to hold trainings on the SPCC rule. The presentation is available in the SPCC Rule: Train-the-Trainer…

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  • Are the GHGs in the National Emissions Inventory Complete?

    No, the 2020 National Emissions Inventory (NEI) does not comprehensively capture all sources and sinks of greenhouse gases (GHGs) in the United States. For this information, users should review the EPA’s annual Inventory of U.S. Greenhouse Gas Emissions and Sinks . However, the NEI does report GHG emissions for select…

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  • What are EPA’s plans for the 2020 National Emissions Inventory given the atypical situation from COVID-19 that is impacting emissions? What will it be used for?

    The EPA intends to prepare a 2020 National Emissions Inventory in collaboration with state, local, and tribal air agency partners. The Air Emissions Reporting Rule (AERR) requires states and delegated local and tribal agencies to report emissions from stationary sources and provide model inputs for onroad and nonroad sources (except…

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  • How often are the NEI data updated and how frequently are the data published?

    The full NEI is created for every third inventory year (e.g., 2008, 2011, 2014, and 2017). The data for each version has been updated two times each for the 2008, 2011, and 2014 NEI cycles. For the 2017 NEI and beyond, the EPA is trying to publish only a single…

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  • Do you have any updates on the status of EPA’s modeling of palm oil biodiesel?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . EPA is actively continuing its FRM evaluation of biodiesel produced from palm oil. We expect to complete that analysis within approximately 6 months, as stated in the preamble to the final rule. All currently available documents including meeting…

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