Search Frequent Questions

Displaying 1 - 15 of 18 results

• May I generate RINs that I produced and sold for non-road use in the past so that I can reinstate those RINs under RFS2?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Section 80.1426(c)(2) provides that RINs are assigned to a volume of renewable fuel when ownership of the RIN is transferred along with ownership of the volume of renewable fuel. A comparable provision appear in the RFS1 regulations, at…

  • Last published: July 23, 2024

• 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…

  • Last published: January 7, 2025

• What is a site assessment and what is the difference between a site assessment and a site investigation?

  The first step of the site assessment process is known as a preliminary assessment (PA). This assessment gathers historical and other readily available information on site conditions and surroundings to evaluate whether the site poses a potential threat to human health and the environment and/or whether further investigation is needed…

  • Last published: February 25, 2025

• Why hasn’t the Norwood Landfill Site been identified as a Superfund Site? Two nearby landfills, Folcroft and Clearview, which were established and in use at the same time as Norwood Landfill and Dump have both been designated as Superfund sites.

  EPA is still conducting its investigation of the Norwood Landfill Site to determine if it should be placed on the National Priorities List (NPL), or Superfund List. Thus far, the data collected has not demonstrated that the site warrants placement on the NPL. Both the Folcroft and Clearview Landfills went…

  • Last published: March 11, 2025

• May I generate RINs for renewable fuel that I produced and sold for non-motor vehicle use in the past so that I can reinstate those RINs under RFS2?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . No. RINs that were previously generated in 2009 and 2010 may be reinstated if they were retired for non-motor vehicle use. However, RINs may not be generated for renewable fuel produced in the past in order to retire…

  • Last published: August 2, 2024

• 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…

  • Last published: January 7, 2025

• 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…

  • Last published: January 7, 2025

• Why did EPA wait so long to begin its investigation of the Norwood Landfill and Old Norwood Dump?

  In the months leading up to the preliminary assessment, EPA gathered information on the property to determine whether a site investigation under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) was warranted. EPA determined to proceed with an investigation and EPA began procuring contractor services to conduct the preliminary…

  • Last published: February 25, 2025

• In addition to 2009 RINs, may a party reinstate 2008 and 2010 RINs that were retired for non-road use under RFS1?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Pursuant to §80.1429(g), any 2009 RINs that were retired for non-motor vehicle, heating oil or jet fuel use under RFS1 may be reinstated under RFS2. The regulations do not allow 2008 RINs to be reinstated. Since RFS1 RINs…

  • Last published: August 2, 2024

• How does a retiring party reinstate RFS1 RINs that were retired because renewable fuel was ultimately used for non-motor vehicle, heating oil or jet fuel purposes? What steps are required to be taken and do any codes require changing?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Pursuant to §80.1429(g), parties may reinstate 2009 RINs that were retired under RFS1 because the renewable fuel was ultimately used in a non-motor vehicle application, heating oil or jet fuel. As stated in question 11.1, since RFS1 RINs…

  • Last published: August 6, 2024

• 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…

  • Last published: January 7, 2025

• 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…

  • Last published: January 23, 2025

• What is the key question EPA tries to answer through a site investigation?
  
  

  Findings of the site investigation determine what hazardous substances may be present, whether they may be released to the environment, and any potential threat to human health. Information about the site that is collected in the preliminary assessment and site investigation phase helps EPA to evaluate the risks posed by…

  • Last published: February 25, 2025

• 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…

  • Last published: February 26, 2025

• 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…

  • Last published: May 31, 2024