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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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  • Criteria for oil production facilities to be qualified facilities

    Qualified facilities are eligible for streamlined regulatory requirements in 40 CFR §112.6, which include self-certification of SPCC Plans. What criteria do oil production facilities have to meet in order to be considered qualified facilities? Oil production facilities, like all other facilities, must meet the criteria in §112.3(g)(1) or (2) to…

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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 is a reactive and non-reactive solid EHS?

    Reactive solid means any extremely hazardous substance denoted with “a” in the “Notes” column in Appendix A or B of 40 CFR 355. Reactive solids are more likely than other solids to be dispersed into the air due to the energy or heat created from their reactivity with water or…

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  • How did states form their SERCs?

    How are States expected to form their State Emergency Response Commission (SERC) as required under Title III? States are required to establish a State Emergency Response Commission (SERC) under Title III. The SERC may consist of existing emergency response organizations or may be an entirely new mechanism to address this…

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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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  • Pesticide applicator quantity applied to threshold or transportation exemption

    A farmer contracts with an applicator to spray pesticides on his fields. The applicator drives a tank truck onto the farmers' field and sprays the pesticide from the truck onto the fields. For purposes of Section 302 emergency planning requirements, are the EHSs in the truck considered present at the…

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  • State refusing to comply with the emergency planning provisions

    What will happen if a State refuses to comply with the emergency planning provisions? A governor who does not designate a State emergency response commission becomes the commission by default. While the governor could choose not to fulfill any of the Title III provisions, the public could still request information…

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  • Section 302 notification requirements and mixtures with unknown components

    Are facilities exempt from Section 302 notification requirements if they produce, use, or store mixtures whose extremely hazardous substance component information is not available on the MSDS provided by the manufacturer? If the facility which produces, uses, or stores mixtures knows or reasonably should know the components of the mixture…

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  • Underground Storage Tanks in SPCC Plans

    If a gas station that has less than 42,000 gallons completely buried oil storage capacity and no aboveground oil storage capacity installs a new aboveground tank with a capacity greater than 1,320 gallons, must the facility’s Spill Prevention, Control, and Countermeasure (SPCC) Plan address the underground storage tanks (USTs) in…

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  • Container capacity less than 55 gallons

    Do facilities need to consider containers that are less than 55 gallons for applicability under 40 CFR Part 112? No. The third column of page 47066 of the July 17, 2002 Preamble states that "You need only count containers of 55 gallons or greater in the calculation of the regulatory…

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  • What is a farm for purposes of the SPCC Rule?

    In the December 2006 amendments to the SPCC Rule, EPA defined a farm as "a facility on a tract of land devoted to the production of crops or raising of animals, including fish, which produced and sold, or normally would have produced and sold, 1,000 or more of agricultural products…

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  • Examples of an agent of a Professional Engineer

    Except as provided in 40 CFR §112.6 for qualified facilities, a Professional Engineer (PE) or an agent of the PE must visit and examine the facility before the PE certifies an SPCC Plan (40 CFR §112.3(d)). What are some examples of an agent of a PE? An agent of a…

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  • Oil-filled equipment capacity

    When counting against the 1,320 aboveground storage capacity threshold, would operational storage of oil (such as in a hydraulic press) be used? Oil which is contained in equipment is required to be factored into the storage capacity for the facility even though the oil may be only used for ancillary…

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