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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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  • How does EPA oversee cleanup at the derailment site?

    EPA leads the Unified Command consisting of different agencies to approve Norfolk Southern’s workplans and weekly activities. EPA also coordinates with other agencies to perform oversight, such as with Ohio EPA, the Columbiana County Health District, and the Pennsylvania Department of Environmental Protection. EPA and Ohio EPA personnel oversee safety…

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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 are the health agencies doing?

    The Centers for Disease Control and Prevention and Agency for Toxic Substances and Disease Registry (ATSDR) are analyzing their Assessment of Chemical Exposure (ACE) survey results to assess the health impacts of the train derailment. CDC and ATSDR continue to support the Ohio and Pennsylvania health departments and will be…

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  • Can a facility divide a process when assigning program levels?

    My process includes a series of interconnected units, as well as several storage vessels that are co-located. Several sections of the process could qualify for Program 1. Can I divide my process into sections for the purpose of assigning Program levels? No, you cannot subdivide a process for this purpose…

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  • If a stationary source has processes ineligible for Program 1, are all processes ineligible?

    If a stationary source has several processes that are covered under 40 CFR Part 68, and some of those processes have had an accidental release within the past five years (effectively making those processes ineligible for Program 1 status), are the individual processes from which no accidents have occurred also…

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  • If a covered process has an accident, when does it lose eligibility for Program 1 status?

    A process covered under 40 CFR Part 68 is eligible for Program 1 requirements if it meets all of the criteria listed at 40 CFR §68.10(b). Those criteria include a requirement that the process cannot have had an accidental release of a regulated substance that led to offsite death, injury…

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  • Applicability of program levels and prevention program requirements for co-located vessels

    I have a tank with 1,000,000 pounds of toluene diisocyanate (TDI), which is covered under the RMP rule, but not under OSHA PSM. Considered by itself, the TDI would be Program 2 for EPA. The tank, however, is close to equipment that has chlorine above the applicable threshold and is…

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  • Changing from a Program 2 or 3 process to a Program 1 process

    If five years have passed since the last accident involving a covered process, and that process meets the other two requirements identified under 40 CFR §68.10(b) for Program 1 eligibility, could that process become a Program 1 process even if it had previously been identified as a Program 2 or…

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  • Now that the track is rebuilt, what else needs to be done and how long will it take?

    There is still a lot of work to do. Contaminated soil to the north and south of the tracks need to be removed. A full site assessment, including extensive sampling, of areas and properties near the derailment site needs to be conducted. A full assessment of impacted creeks will be…

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  • If there is a government shutdown, will work continue on the cleanup?

    A 45-day continuing resolution was recently passed to avoid a shutdown. EPA’s emergency response efforts, such as in East Palestine, would move forward under a lapse in appropriation. As a result, EPA personnel would continue to fully support those efforts during a lapse.

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  • What is the process for refilling excavated areas at the derailment site?

    Areas that were excavated as part of the derailment cleanup effort will be backfilled with clean soil. Before soil is chosen as backfill it is tested for chemicals and heavy metals. While the source of backfill is still being identified, some areas have been temporarily backfilled with ballast (large gravel)…

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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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