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Remove all filtersDisplaying 1 - 15 of 25 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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What is the Tier 2 Vehicle & Gasoline Sulfur Program?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The Tier 2 Vehicle and Gasoline Sulfur Program is a landmark program, begun in January 2004, that affects every new passenger vehicle and every gallon of gasoline sold in the U.S. By designing cleaner cars that run on…
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Can a refiner or importer use gasoline sulfur test methods other than ASTM D 2622-98, especially for sulfur levels of 10 ppm and less?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The rule designates ASTM D 2622 as the benchmark test method by which compliance will be determined, and that is the test that the Agency typically will use in establishing compliance. However, the rule does permit alternative test…
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There is significant difference between "refiner" and "refinery". Portions of the regulations use "refiner" where "refinery" is the appropriate term. While it may be clear from the context that "refinery" is meant, text should be changed to avoid any poss
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . We agree with the comment and intend to make these clarifications in a future rulemaking. These clarifications would not affect the regulatory requirements in the current final rule.
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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://ofmpub.epa.gov/sccwebservices/sccsearch/ .
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Must a refinery that produces both California gasoline and federal RFG designate each batch produced as either federal RFG or California gasoline, and maintain segregation of both products, even though the gasoline meets the requirements of both programs?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Section 80.375(c) requires that each batch of California gasoline be designated as such by the refiner or importer, and that California gasoline be segregated from gasoline that is not California gasoline at all points in the distribution system…
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Truckers may obtain both premium gasoline and regular gasoline from a terminal in order to supply a retail outlet with midgrade gasoline. In such cases, if a truck obtains a load of gasoline from a terminal that consists of a mixture of gasoline from a te
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The regulation specifically exempts gasoline in trucks from the testing requirement for S-RGAS, and instead allows truckers to rely on the test result of the terminal supplying the truck carrier. See § 80.210(d)(4). Where a tanker truck receives…
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Section 80.46(a) was amended by the rule to require the use of ASTM D-3246 to determine the sulfur content of butane. Many refiners and butane suppliers do not currently use that method. Requiring a new method prior to the 2004 effective date of the gasol
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The final gasoline sulfur rulemaking amended 40 CFR § 80.46(a) to require the use of ASTM D 3246-96 to determine the sulfur content of butane. We did not intend to require the use of this new test method…
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Can butane blenders generate allotments and credits?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Section 80.340(b)(1) provides that butane blenders may comply with the gasoline sulfur rule sampling and testing requirements using test results from the butane supplier provided that certain requirements are met. One requirement is that the sulfur content of…
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Does the gasoline sulfur rule require refiners and downstream parties to account for the sulfur content of a registered fuel additive, such as a corrosion inhibitor used to help prevent sulfur-related fuel gauge sending unit failures?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Currently, there is no requirement under the gasoline sulfur rule for refiners or downstream parties to demonstrate compliance with the gasoline sulfur standards for registered fuel additives. Parties who add fuel additives, however, are responsible for ensuring that…
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Section 80.335(a)(2) requires refiners to retain sample portions for the most recent 20 samples collected, or for each sample collected during the most recent 21 day period, whichever is greater. Is a refinery that produces only one or two batches of gaso
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The cited section of the regulation specifies the minimum number of batch samples from a refinery, which once created, must be maintained (twenty). The regulation does not specifically address the maximum amount of time that any particular sample…
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A refiner produces a batch of gasoline at its refinery. It collects a sample of the gasoline and conducts certification testing. The sulfur content test result is less than the 80 ppm refinery level standard. The gasoline is then moved to another tank wit
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The downstream standard applies to samples of gasoline subsequent to movement of the gasoline from the tank in which certification sampling is conducted, even when these subsequent samples are collected within the refinery or import facility where the…
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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 .
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