Search Frequent Questions

Displaying 1 - 15 of 18 results

• How do the different parts of particulate matter (PM) fit together?

  The various parts of PM in the NEI are related as follows. PM10-FIL > PM25-FIL because PM10-FIL includes PM25-FIL PM25-PRI = PM25-FIL + PM-CON This equation only applies at the process level. Because some sources only can report PM2.5 (due to test method differences), this equation does not apply to…

  • Last published: April 17, 2024

• How does PM2.5 relate to PM species such as EC, OC, SO4, NO3, PMFINE, and DIESEL-PM25?

  Primary PM2.5 estimates are speciated into the five PM species in the NEI: elemental (black) carbon (EC), organic carbon (OC), nitrate (NO3), sulfate (SO4), and the remainder of PM25-PRI (PMFINE). Diesel engine PM25-PRI and PM10 emissions are also labeled as DIESEL-PM25 and DIESEL-PM10 for mobile source diesel engines. For all…

  • Last published: April 17, 2024

• What is Vermiculite?

  Vermiculite is the mineralogical name given to hydrated laminar magnesium-aluminum-iron silicate that resembles mica in appearance. All vermiculite ores contain a range of other minerals that were formed along with the vermiculite in the rock. Vermiculite ores from some sources have been found to contain asbestos minerals but asbestos is…

  • Last published: April 23, 2024

• In the past, EPA has, with the assistance of industry trade associations, produced fuels brochures for use at retail outlets explaining new fuel programs and addressing performance and air quality issues. Is EPA planning a similar effort with respect to t

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . In November 2005, the Clean Diesel Fuel Alliance was formed. Many public and private organizations are collaborating through the Clean Diesel Fuel Alliance to facilitate the introduction of ULSD. The U.S. Department of Energy (DOE), EPA, engine, vehicle…

  • Last published: August 1, 2024

• What are some uses of Vermiculite?

  Vermiculite has been used in various industries for over 80 years. It is used in the construction, agricultural, horticultural and industrial markets. Examples of products that contain vermiculite include potting soil mixes, loose fill insulation, and packing material. For more information, visit the EPA webpage: Protect Your Family from Asbestos-Contaminated…

  • Last published: April 23, 2024

• A tank truck common carrier picks up a load of ULSD at a Shell terminal and delivers it to a Flying J truckstop. The carrier only provides a transportation service, does that carrier have any registration or reporting duties?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . No, the carrier does not have registration or reporting duties as long as taxes were assessed (in the case of highway fuel) or dye was added (in the case of NRLM) at the terminal. There are recordkeeping and…

  • Last published: August 2, 2024

• Will refiners produce No. 1 diesel fuel at 15 ppm sulfur? What other cold weather-gelling strategies are available to the end-user?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Yes, some refiners will produce No. 1 diesel fuel. There are also various other cold-flow improver additives currently on the market as well. Question and Answer was originally posted at Questions and Answers on the Clean Diesel Fuel…

  • Last published: August 2, 2024

• Many refiners currently make a jet fuel meeting <500 ppm requirements. If refiners make a jet fuel meeting 15 ppm requirements, there may be compatibility (safety or performance) issues for jet engine manufacturers. Have these manufacturers been consulted

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The highway and nonroad diesel programs do not require that refiners produce 15 ppm sulfur jet fuel and do not set sulfur limits for jet fuel that is not designated as motor vehicle diesel fuel. This would be…

  • Last published: August 2, 2024

• What does an annual emissions value in the NEI represent (one year or multiple years)?

  The NEI provides total annual emissions for a single year.

  • Last published: January 7, 2025

• What is included in the emissions “Tiers”?

  The Tiers are assigned by a Source Classification Code (SCC), which has the most detail about the emissions processes that generate the emissions. The full list of SCCs, their associated Tiers, and the SCC descriptions is available online at https://sor-scc-api.epa.gov/sccwebservices/sccsearch/ .

  • Last published: February 26, 2025

• If a terminal imports off-spec kerosene (higher than 15 ppm), terminal operators are planning to blend the kerosene with diesel fuel so that the ultimate diesel fuel leaving the terminal gate and entering into commerce meets the 15 ppm standard.

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The regulations at § 80.525(d) state that kerosene that a kerosene blender adds, or intends to add, to motor vehicle diesel fuel subject to the 15 ppm sulfur standard must meet the 15 ppm sulfur standard. Section 80.521(b)…

  • Last published: July 24, 2024

• Section 80.600(a)(10) says, Any refiner or importer shall maintain copies of all product transfer documents required under §80.590. If all information required in paragraph (a)(6) of this section is on the product transfer document for a batch, then the

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Section 80.600(a)(10) first requires that product transfer documents under § 80.590 be maintained by refiners and importers. It then states that if such product transfer documents contain all the information required under paragraph (a)(6) of § 80.600 for…

  • Last published: August 2, 2024

• What are the units of NEI emissions data?

  NEI emissions values represent total annual emissions for the inventory reporting year. Criteria air pollutants and precursors (CAPs) are reported in short tons per year , and hazardous air pollutants (HAPs) are reported in lbs per year .

  • Last published: January 7, 2025

• Does a home seller have to disclose to a potential buyer that a home contains asbestos? What about vermiculite?

  Federal law does not require the seller to disclose to a buyer that their home contains asbestos or vermiculite. State or local requirements may require disclosure. Contact your state about such requirements. Other Frequent Questions about Asbestos Learn About Asbestos Asbestos and School Buildings Information for Owners and Managers of…

  • Last published: March 21, 2024

• My company currently sells distillate blendstocks. Can we continue to sell blendstocks given the new regulations?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Yes, you may continue to sell blendstocks. In addition, it would also be in your best interest, for defense purposes, to identify any product that you ship. Question and Answer was originally posted at Questions and Answers on…

  • Last published: August 6, 2024