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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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  • 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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  • 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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  • If your farm does not have fuel storage that will flow into US waters by a ditch, river, stream, or lake, do you have to prepare a SPCC Plan?

    No. EPA suggests you use a common sense approach. If one of your oil storage tanks leaks, and the spilled oil would not flow into navigable waters or adjoining shorelines, you do not have to prepare a Plan. Remember that you still have the responsibility to clean up any spilled…

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  • How do the changes in the 2006 Amendments apply to mobile refuelers?

    Mobile refuelers are now exempt from the following sized secondary containment provisions that still apply to all other bulk storage containers and mobile/portable bulk storage containers: • Sections 112.8(c)(2) and (11) for petroleum oils • Sections 112.12(c)(2) and (11) for animal fats and vegetable oils These provisions previously required sized…

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  • What is considered bulk oil storage capacity?

    The revised rule recognizes that oil is sometimes stored in bulk and sometimes used operationally. A bulk storage container is any container storing oil at a facility. Bulk oil storage containers may include, but are not limited to tanks, containers, drums, and mobile or portable totes. Operational use includes oil-filled…

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  • Ground water pathways related to reasonably expected to discharge

    The SPCC Rule applies to facilities that could reasonably be expected to discharge into navigable waters (40 CFR §112.2(a)). Does a facility need to consider ground water pathways when determining if a discharge of oil could reasonably be expected to reach navigable waters? Owners and operators should consider whether on-site…

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  • Visit and examination requirements for SPCC self-certification

    Pursuant to 40 CFR §112.6, the owner or operator of a facility that meets the criteria in §112.3(g) for either a Tier I or Tier II qualified facility may self-certify the facility's SPCC Plan. As part of the self-certification, the owner or operator must certify that he or she has…

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