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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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  • Use Federal Tier II Form When Claiming Trade Secret

    40 CFR Part 350 allows facilities to withhold certain chemical information when reporting under EPCRA if the facility claims those chemicals to be a trade secret. When submitting the required trade secret claim package for Tier II reports, must a facility use the federal Tier II inventory form or can…

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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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  • Are hazardous chemicals present at rail yards subject to EPCRA 311/312?

    Yes, hazardous chemicals present at rail yards are subject to EPCRA Sections 311 and 312, if they are not stored incident to transportation and they are present at the rail yard in amounts equal to or in excess of the minimum thresholds in 40 CFR 370.10(a). As explained in the…

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  • E-cigarette and EPCRA 311 / 312 Reporting

    Are hazardous chemicals used to make e-cigarette products considered tobacco or tobacco products and thus exempt from EPCRA sections 311 and 312 reporting requirements? No. The MSDS reporting requirements under EPCRA Section 311 and Chemical Inventory (i.e., Tier II) reporting requirement under EPCRA Section 312 apply to owners and operators…

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  • Agricultural use exemption and chemicals used for fish farming

    Sections 311 and 312 require facility owners or operators to submit Material Safety Data Sheets (MSDSs) and annual inventory reports for any hazardous chemical subject to OSHA's Hazard Communication Standard (29 CFR §1910.1200(c)) which is present at a facility above a reportable threshold (40 CFR §370.10) . An owner or…

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  • Hazardous chemicals used in animal digestors or incinerators

    Are hazardous chemicals used in equipment, such as an animal carcass digestor or incinerator, located on the grounds of a medical or veterinary facility exempt from the definition of hazardous chemical and, therefore, exempt from reporting under EPCRA Sections 311 and 312? Any substance to the extent it is used…

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  • Agricultural use exemption and fuels

    Does the agricultural use exemption, Section 311(e)(5), apply to fuels used by harvesting services to transport crops from the farm to the market or the food processor? Does the agricultural use exemption apply to the fuel used by the farmer to transport crops from the farm to the market or…

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  • EPCRA 311 / 312 Reporting Responsibility For Industrial Park Owner

    EPCRA sections 311 and 312 assign responsibility for reporting to “the owner or operator of any facility which is required to prepare or have available a material safety data sheet (MSDS) for a hazardous chemical under the Occupational Safety and Health Act (OSHA) of 1970 and regulations under that act.”…

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  • Bricks May Be Eligible for Solid and Manufactured Item Exemption for EPCRA 311 / 312 Reporting

    For safety data sheet (SDS) and Tier II inventory reporting under EPCRA Sections 311 and 312, there is an exemption for solid and manufactured items that do not have the potential for exposure under normal conditions of their use. Are bricks eligible for the solid and manufactured item exemption under…

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  • State Single Point Submission Process for Tier II Reports

    Pursuant to 40 CFR 370.44, the owner or operator of a facility must submit the required Tier II inventory information to their State Emergency Response Commission (SERC), Local Emergency Planning Committee (LEPC), and fire department with jurisdiction over their facility. If a state has implemented a single point of submission…

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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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  • Tier II submission fees

    Are there any fees associated with the submission of a Tier II form? There are no federal fees associated with the submission of a Tier II form. However, owners and operators of facilities subject to 40 CFR Part 370 are encouraged to check with their state agencies, as some states…

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  • Hazardous chemicals used for medical or research purposes

    A medical facility uses liquid nitrogen for the nuclear magnetic resonance spectrometer. The spectrometer is used for medical diagnostic purposes. In addition, the facility is required by the Occupational Safety and Health Administration (OSHA) to have a material safety data sheet (MSDS) available for the liquid nitrogen. Is the liquid…

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