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Displaying 1 - 15 of 23 results
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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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Redoing calculations if RMP*Comp is updated
Will RMP*Comp be updated? If so, would I have to redo calculations I might already have made with an earlier version? No, you do not have to redo your work if you have already completed your consequence analyses. RMP*Comp is based on the EPA's Offsite Consequence Analysis Guidance (OCA Guidance)…
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Different distances to toxic endpoints with different versions of RMP*Comp
I've noticed that for certain chemicals, RMP*Comp gives substantially different distances to the toxic endpoint than previous versions. Why? In the current version of RMP*Comp, we have incorporated new chemical-specific distance tables for ammonia, chlorine, and sulfur dioxide. The generic tables are still used for other chemicals (you can see…
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Distance to endpoint calculations used by RMP*Comp
Does RMP*Comp perform some math or modelling in order to arrive at an endpoint distance, or is it simply interpolating from the tables in the EPA's Offsite Consequence Analysis Guidance (OCA Guidance)? RMP*Comp follows the procedures set out in the OCA Guidance . This means that for some scenarios, the…
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In a situation where an importer leases tankage from another company, e.g., from a for-hire terminal, who must register such import facility, the company that owns the terminal, the importer that leases the tankage, or both?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Under § 80.2(r), an importer is defined as "a person who imports gasoline or gasoline blending stocks or components from a foreign country into the United States...." Accordingly, it is the importer of the gasoline, and not the…
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If my fuel is already registered with the Fuels and Fuel Additives program under 40 CFR Part 79, do I still need to register with the RFS2 program under 40 CFR Part 80?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Yes. Even if your fuel or fuel additive is already registered under 40 CFR Part 79, there are additional registration requirements for parties regulated under the RFS2 program, as specified in 40 CFR 80.1450.
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Once I register my fuel for the RFS2 program under §80.1450, do I still need to register my fuel under 40 CFR Part 79?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Yes. Renewable fuels intended for use or used in motor vehicles are required to be registered under 40 CFR part 79 prior to any introduction into commerce. Manufacturers of renewable fuels and fuel additives not registered under part…
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Does EPA consider it a conflict of interest for a third-party company to assist a group of renewable fuel producers and importers of renewable fuel to help meet the requirements of the re-registration and engineering review pursuant to section 80.1450?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . EPA does not restrict a renewable fuel producer or an importer of renewable fuel from seeking a third-party company to assist them in meeting the re-registration and engineering review requirements pursuant to section 80.1450. The renewable fuel producer…
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Will common carriers be required to register their transport trucks as oxygenate blending facilities?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Normally, only the owner of the gasoline produced at an oxygenate blending operation must register as an oxygenate blender. If a common carrier blends gas in trucks that it owns it must meet all of the requirements for…
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Is the licensed professional engineer conducting the engineering review required to perform the site visit in person, or can they delegate the site visit to another person who maybe assisting them in the engineering review?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Pursuant to §80.1450(b)(2), all verifications must be performed by the licensed professional engineer conducting the engineering review. This requirement includes conducting the site visits. The licensed professional engineer conducting the engineering review must perform the site visits to…
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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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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/ .
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RMP*Comp and emergency response
Can I use RMP*Comp for emergency response? No. It's a planning tool. Many other tools are available for response, including ALOHA . You can learn more by reading CAMEO tools for RMP .
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Minimum and Maximum Distance to Endpoint
The Chemical Accident Prevention Provisions require the completion of a worst-case release scenario analysis (40 CFR §68.25). This analysis includes estimating the greatest distance to endpoint as defined by the parameters in §68.22. Is there a required minimum or maximum distance for the distance to endpoint in the worst case…
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