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Where can I find older NEI data (prior to 2008)?
The raw data and summaries that are still available (dating back to 1990) can be obtained from the web page https://www.epa.gov/air-emissions-inventories/pollutant-emissions-summary-files-earlier-neis . Starting with 2001 data, a more limited selection of summary files are available.
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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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How will the volume of corn ethanol produced above the grandfathering threshold be treated?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . For grandfathered facilities, only the baseline volumes are exempt from the 20 percent GHG reduction requirement Thus, RINs may be generated for baseline volumes of fuel regardless of lifecycle greenhouse gas emissions performance. Volumes of fuel produced above…
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Do grandfathered facilities have an additional 6 months to submit their engineering reviews to EPA?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Yes. In the preamble to the final RFS2 regulations at 75 Fed. Regs. 14709 (March 26, 2010), EPA stated that, in an effort to reduce demand on engineering resources in the interim between promulgation of the rule and…
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What is meant by "grandfathered" fuel?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Under the RFS2 regulations, renewable fuel produced from facilities that commenced construction before December 19, 2007 and which completed construction within 36 months without an 18 month hiatus in construction and thereby exempt from the minimum 20% GHG…
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How long will the grandfathering provision be effective? Once a grandfathered producer registers and completes their engineering review, will their baseline volume ever need to meet the 20% GHG reduction requirement?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . If a facility meets the requirements for exemption from the 20% GHG reduction requirement pursuant to 40 CFR 80.1403(c ) or (d), then the baseline volume of renewable fuel produced by that facility is exempt from the 20%…
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Does EPA’s announcement of June 18, 2010 modify the Lead Renovation Repair and Painting Rule’s requirements that contractors use lead-safe work practices when working in pre-1978 housing or child-occupied facilities?
Answer: This announcement does not change the requirement that all contractors take steps to protect children and families from the dangers of lead poisoning by becoming certified and following the work practice standards and the associated recordkeeping requirements. As of April 22, 2010 all contractors have been required to be…
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How does the June 18, 2010 announcement impact renovators in states that have adopted their own RRP programs?
Answer: If you work in a state authorized by EPA to run their own renovation program, you should contact them for information on their certification requirements. If you work in a state where EPA administers the renovation program your firm needs to be certified by EPA. Please refer to the…
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Thousands of renovators are already trained and their firms are EPA certified. Will EPA enforce against renovators who did not receive their training certification before December 31, 2010?
It is most important that all contractors follow the RRP work practice standards. However, EPA is providing additional time for renovation firms and workers to obtain the necessary training and certifications before the enforcement of the firm certification and individual renovator requirements begins. Therefore, renovators who have not been able…
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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…
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What sources make up the Tier 1 categories used in the emissions trends?
Tier 1 categories are assigned by source classification codes (SCCs) that are the most specific processes available in the NEI. The latest SCC list with the Tier 1 assignments can be downloaded from the EPA SCC website in Comma Separate Values (CSV) format.
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What is the cause of the large decrease in electric utility emissions, particularly sulfur dioxide, starting in 1995?
SO2 emissions reductions from utilities during this time are primarily attributed to the impacts of the acid rain program. As described on EPA’s Acid Rain Program web page, Phase 1 of this program began in 1995 and affected 263 units at 110 most coal-burning electric utility plants in 21 eastern…
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Can I get access to the Emissions Inventory System if I am not a data provider to EPA?
The Emission Inventory System (EIS) is a secured database for EPA and State/Local and Tribal Air Agencies only. The EIS is used to develop the National Emission Inventory (NEI). While you cannot have access to EIS, you can have access to the current and past NEIs through EPA’s NEI website…
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How does a foreign grandfathered renewable fuel production facility processing a mixture of feedstocks with different D codes or no D codes classify its production into D code categories so RINs can be generated when the product is imported into the U.S.?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . If the importer is generating the RINs, the importer must obtain all the required information for registration from the foreign producer of the renewable fuel pursuant to 80.1426(a)(2) and 80.1450. In the case of a foreign producer using…
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