Search Frequent Questions

Filter By:

Active filters:

Remove all filters

Displaying 106 - 120 of 135 results

  • What are the units of NEI emissions data?

    NEI emissions values represent total annual emissions for the inventory reporting year. Criteria air pollutants and precursors (CAPs) are reported in short tons per year , and hazardous air pollutants (HAPs) are reported in lbs per year .

    • Last published:

  • CERCLA Hazardous Substances Defined

    CERCLA section 103 release reporting requirements apply to "hazardous substances." How are CERCLA hazardous substances defined? The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) defines "hazardous substance" by reference to the following authorities: Clean Water Act (CWA) section 311 (“CWA Hazardous Substances”), CWA section 307(a) (“CWA Toxic Pollutants”), Clean…

    • Last published:

  • Are written follow-up notifications required after the initial telephone notifications?

    When a facility releases a reportable quantity of a hazardous substance, are there any requirements for written follow-up notification, after the initial telephone notifications, under the Emergency Planning and Community Right-to-Know Act (EPCRA) or the Comprehensive Emergency Response, Compensation, and Liability Act (CERCLA)? Under EPCRA, an owner or operator must…

    • Last published:

  • What is the definition of VOC?

    There is a regulatory definition of VOC. It is found in 40 CFR 51.100. CFR - code of federal regulations. The definition relates to the intent and requirements of the Clean Air Act. Excerpt from “Volatile Organic Compounds” Definition per 40 CFR Part 51.100(s): " Volatile organic compounds (VOC) means…

    • Last published:

  • How can I get more detailed information? What measurements/sensors are used to measure emissions?

    Access the latest NEI data set . Under 'Sector Summaries - Criteria and Hazardous Air Pollutants by 60 EIS emission sectors', > choose National > for Pollutant, choose PM10 Primary and/ or PM2.5-PRI > Sector, choose all sectors >Submit Query to see results at bottom of page. Open the results…

    • Last published:

  • What does "NEC" stand for in the emissions sectors?

    NEC means “not elsewhere classified” and includes SCCs that are not assigned to any of the other specific industrial process sectors. If you look at the SCC code table available at the SCC web site and filter on the Sector name that includes “NEC”, you can see the type of…

    • Last published:

  • Reporting radionuclide mixtures if composition is known

    How are mixtures of radionuclides reported if the composition of the mixture is known? The requirements for reporting mixtures of radionuclides depend on whether the composition of the mixture is known or unknown. If the identity and quantity (in curies) of each radionuclide involved in a release is known, the…

    • Last published:

  • How do I download the data from the “Data Summaries” tab on the NEI data pages?

    On these pages after you run a query, there should be icons that at the top of the data table generated by your query. These icons look like this: COPY CSV EXCEL PDF PRINT If these icons do not appear, it is because Adobe Flash is being blocked by your…

    • Last published:

  • Why do mobile source NOx emissions jump higher between 2001 and 2002 on the emissions trends?

    The emissions model used for mobile sources changed from MOBILE6.2 to MOVES 2010 in December 2009. This change included a notable increase in NOx emissions. The EPA adjusted data back to 2002 to reflect the change in models. The higher emissions in 2002 are because of this method change and…

    • Last published:

  • Release notification for release at a Federal facility

    Would the National Response Center (NRC) need to be notified of a release of a hazardous substance in an amount equal to or exceeding a Reportable Quantity (RQ) at a Federal facility? Yes. Under CERCLA section 120, all requirements of CERCLA apply to the Federal government in the same manner…

    • Last published:

  • Should location and the cause of incident be included in the the written follow-up?

    Regarding the written follow-up report to an incident, should location of the incident and the cause of the incident be included? The April 22,1987 Federal Register ( 52 FR 13387 ) states that the location of the incident should definitely be included in both the initial and written follow-up reports…

    • Last published:

  • What emergency release information must be reported to a telephone operator?

    An owner or operator of a facility from which there is a release of a substance during transportation or storage incident to transportation may meet the emergency release notification requirement by providing the information specified in 40 CFR §355.42(b) to the 911 emergency operator, or in the absence of a…

    • Last published:

  • Release Reporting Requirements for Hazardous Substances in Mixtures

    How can a facility determine if they must report a release of a mixture containing hazardous substances under CERCLA section 103? If the quantity of all of the hazardous constituents of the mixture or solution is known, a person in charge of a vessel or facility must report a release…

    • Last published:

  • Required information for CERCLA and EPCRA telephone notifications

    Do the CERCLA and EPCRA telephone notifications include the same basic information, such as whether the incident is still ongoing, abatement actions by whatever entities, cause of the accident, injuries caused by the incident if known, amount spilled, etc.? The Agency does not believe that the notification specified in Section…

    • Last published:

  • Follow-up emergency notice requirements in EPCRA 304 for CERCLA hazardous substances

    Must a follow-up emergency notice be given for a release of a CERCLA hazardous substance which is not an extremely hazardous substance and for which a reportable quantity has not been established under Section 102(a) of CERCLA? In lieu of the emergency release notification required under Section 304(b), Section 304(a)(3)(B)…

    • Last published: