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Displaying 1 - 15 of 68 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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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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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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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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What are the recordkeeping requirements for a renewable fuel producer that uses used cooking oils and fats as feedstocks for renewable fuel?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Renewable fuel producers using used cooking oils or animal wastes as feedstocks are required under 40 CFR 80.1454(d)(3) to obtain from their feedstock supplier, and maintain in their records, documents which certify that the feedstock meets the definition…
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Are biogenic emissions included in the emissions trends Tier 1 data?
No, the biogenic emissions are not included in the emissions trends Tier 1 data. If needed, users can add the biogenic data either as a separate Tier, or specify its inclusion in the “Miscellaneous” Tier 1 group.
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If a company has several legal entities, does each entity have to become a certified firm?
Answer: Yes, if the corporate structure is such that the parent company is not liable for actions of the separate legal entities. Question Number: 23002-18225 Find a printable PDF copy of all frequent questions pertaining to lead .
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My non-profit organization applies for and receives grants to renovate older homes. We do not perform the renovations ourselves, we hire renovation contractors to perform them on our behalf. Must my non-profit organization become an RRP-certified firm?
Answer: Yes, even though your organization's employees do not actually perform the renovation activities, your organization must be an RRP-certified renovation firm because your organization, through the grant process, is offering to perform renovations for compensation, i.e., the grant. Question Number: 23002-19775 Find a printable PDF copy of all frequent…
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I am a facilities manager for a church with daycare and preschool programs. I recently became a certified renovator. If my staff and I do our own painting and remodeling work, do we need to be a certified firm?
Answer: Yes, if you perform, offer, or claim to perform renovations in a portion of the building that is a child-occupied facility. The RRP Rule defines a child-occupied facility as a building, or portion of a building, constructed prior to 1978, visited regularly by the same child, under 6 years…
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If the demolition, cleanup, and cleaning verification portion of a renovation project is performed under the direction of a certified renovator using trained workers, can uncertified workers complete the job if further disturbance of paint will not occur?
If the demolition, cleanup, and cleaning verification portion of a renovation project is performed under the direction of a certified renovator using trained workers, can uncertified workers complete the job if further disturbances of painted surfaces will not occur? For example, a certified firm establishes containment and removes wall and…
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Must maintenance workers at kindergartens and elementary schools become certified renovators if they perform renovations covered by the RRP Rule? Are the schools or school systems then required to become certified renovation firms?
On or after April 22, 2010, all renovations covered by the Lead Renovation, Repair and Painting (RRP) Rule must be directed by certified renovators and must be performed by certified renovators or individuals trained by a certified renovator. The RRP rule requires any firm, including a local government agency that…
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How complete are the data in the National Emissions Inventory?
While the goal of the National Emissions Inventory (NEI) program is to include all emissions data, there are always challenges meeting this goal. The answer about completeness of coverage of sources depends on the emissions sector and pollutant. In general, the criteria air pollutants and precursors (CAPs) are expected to…
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