Search Frequent Questions

Filter By:

Active filters:

Remove all filters

Displaying 1 - 15 of 83 results

  • Criteria for selecting alternative release scenarios

    As part of the hazard assessment, owners and operators of Program 2 and Program 3 covered processes must identify and analyze alternative release scenarios (40 CFR §68.28). What criteria should be used when selecting an alternative release scenario? The owner or operator of a stationary source subject to the risk…

    • Last published:

  • Does the distance to endpoint start at the process or stationary source boundary?

    When selecting the worst-case release scenario for Program 2 and 3 processes as required by 40 CFR §68.25, a stationary source owner or operator must analyze the release scenario that results in the greatest distance to an endpoint. Does the "greatest distance to an endpoint" refer to the greatest total…

    • Last published:

  • Using meteorological station data for off-site consequence analyses

    For the purpose of the offsite consequence analyses required under 40 CFR Part 68, Subpart B, there are several instances in which data gathered at a local meteorological station may be used to establish the modeling parameters of wind speed, atmospheric stability, temperature, and humidity for the stationary source. How…

    • Last published:

  • Underground storage tank off-site impacts to groundwater, drinking water, or soil

    For the worst-case and alternative release scenarios of an underground storage tank, should I consider any impact on groundwater, drinking water, or soil? No. As part of the worst-case and alternative release scenarios, you need to define the offsite impacts to the environment (40 CFR §68.33) by listing the environmental…

    • Last published:

  • Administrative controls considered when determining worst-case release quantity

    For the purpose of analyzing the worst-case release scenario required as part of the hazard assessment at 40 CFR Part 68, Subpart B, the worst-case release quantity is identified as the greatest amount held in a single vessel or pipe, taking into account administrative controls that limit the maximum quantity…

    • Last published:

  • Are Mechanical Controls Considered Administrative Controls?

    For the purpose of analyzing the worst-case release scenario required as part of the hazard assessment at 40 CFR Part 68, Subpart B, the worst-case release quantity is identified as the greatest amount held in a single vessel or pipe, taking into account administrative controls that limit the maximum quantity…

    • Last published:

  • Worst-case release from smaller process with larger distance to endpoint

    The owner or operator of a stationary source covered by the risk management program regulations must conduct a worst-case release scenario analysis as part of the required hazard assessment (40 CFR §68.25). The worst-case release is defined as the release of the largest quantity of a regulated substance from a…

    • Last published:

  • Can I use any previous three year meteorological data for worst case scenario?

    I am trying to complete my worst case release scenario for the Risk Management Plan under §68.25. I understand that I am required to use a wind speed of 1.5 m/s and F atmospheric stability class as specified in §68.22(b), unless I can prove that at no time over the…

    • Last published:

  • I have a for-profit business where I purchase residential properties and renovate them. Is this type of renovation work on pre-1978 properties covered by the Lead Renovation, Repair, and Painting (RRP) Rule?

    Yes. Individuals who buy, renovate and sell pre-1978 residential properties for a profit (i.e., house flippers) or lease pre-1978 residential properties (i.e., landlords), and do the renovation work themselves, are performing renovations for compensation and are therefore subject to all requirements under the RRP Rule . You must be a…

    • Last published:

  • How do I register renewable gasoline?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Manufacturers/importers of renewable gasoline for on-road use are required to register the fuel with the EPA. To register, see: Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 . Please indicate “renewable gasoline”…

    • Last published:

  • Where can I find the public list of registered fuels and fuel additives?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . An online list of fuels and fuel additives registered with EPA is located here: Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 .

    • Last published:

  • How do I register renewable diesel?

    See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Manufacturers/importers of renewable diesel for on-road use are required to register the fuel with the EPA. To register, see Register or Update a Fuel or Fuel Additive Request under 40 CFR Part 79 . Please indicate “renewable diesel”…

    • Last published:

  • How many worst-case release scenarios must be analyzed and documented in the RMP?

    As a part of the hazard assessment requirements in 40 CFR Part 68, Subpart B, I must analyze worst-case release scenarios and document certain analyses in my risk management plan (RMP). How many worst-case release scenarios must be analyzed, and how many analyses must be specifically documented in the RMP…

    • Last published:

  • Identifying public receptors and property with restricted access

    Does public receptor cover only buildings on a property or the entire property? If the owner of the land next to my site restricts access to the land, is it still a public receptor? Public receptors are not limited to buildings. For example, if there are houses near your property…

    • Last published:

  • When to Revise OCA

    The risk management program in 40 CFR Part 68 requires facilities to conduct an off-site consequence analysis (OCA) to provide information to state, local, and federal governments and the public about the potential consequences of an accidental chemical release. When does a facility need to revise its OCA? The owner…

    • Last published: