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  • 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…

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  • 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…

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  • Determining frequency of coordination activities

    The Risk Management Program regulations require owners and operators of stationary sources to coordinate their response needs annually, or more frequently if necessary, with local emergency planning and response organizations (40 CFR §68.93(a)). Are stationary sources responsible for determining if coordination activities should occur more often than annually? Ultimate responsibility…

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  • Who Must Develop an Emergency Response Program?

    The risk management program regulations require the owner or operator of a covered stationary source to develop and implement an emergency response program as described in 40 CFR §68.95, which must include an emergency response plan, emergency response equipment procedures, employee training, and procedures to ensure the program is up-to-date…

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  • How do I register renewable gasoline?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Manufacturers/importers of renewable gasoline for on-road use are required to register the fuel with the EPA. To register, see: Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 . Please indicate “renewable gasoline”…

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  • Where can I find the public list of registered fuels and fuel additives?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . An online list of fuels and fuel additives registered with EPA is located here: Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 .

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  • How do I register renewable diesel?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Manufacturers/importers of renewable diesel for on-road use are required to register the fuel with the EPA. To register, see Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 . Please indicate “renewable diesel”…

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  • When do I get an EPA assigned fuel ID/additive ID?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . You will receive your assigned ID after registering your fuel and/or fuel additive with EPA.

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  • 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://ofmpub.epa.gov/sccwebservices/sccsearch/ .

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  • Which fuels require registration?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Under Part 79, manufacturers and importers of gasoline and diesel fuels for use in a motor vehicle or additives for such gasoline or diesel fuel are required to register them with the EPA prior to sale.

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  • We are a marketer of ethanol products. Sometimes personnel at ethanol plants make mistakes as to the number of gallons being loaded or produced. How do we "recall" erroneous RINs if the number of gallons we receive exceeds the number of RINs?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . PTD documents may be corrected to reflect the appropriate volume associated with the volume received. The additional volume with assigned RINs may be addressed with a second PTD. Question and Answer was originally posted at: Questions and Answers…

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  • 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.

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  • How do I notify EPA if I have changed some of the components of my fuel and/or fuel additive?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Information related to updating fuel and fuel additive registrations is available here: Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 .

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  • Am I required to register biodiesel? How would I do that?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Manufacturers/importers of biodiesel for on-road use are required to register the fuel with the EPA. To register, see Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 . Additionally, please attach the following…

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  • I recently began producing a new fuel/fuel additive that was not previously reported. How soon do I need to report it?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . New fuels/fuel additives must be registered prior to introduction into commerce. Registration instructions and forms for registering new fuel/fuel additive are available here: Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 .

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