Search Frequent Questions

Filter By:

Active filters:

Remove all filters

Displaying 16 - 30 of 69 results

  • How are thresholds for regulated toxic substances in mixtures determined?

    Formaldehyde is listed as a regulated substance under 40 CFR 68.130 with the qualifier "(solution)." When determining whether a threshold amount of this substance exists in a process, should a person consider the weight of the entire solution, or simply the amount of formaldehyde in the solution? How are thresholds…

    • Last published:

  • Qualifier "solution" in the listing for formaldehyde

    Formaldehyde is listed in 40 CFR 68.130 with the qualifier "solution." Does the qualifier refer only to mixtures of formaldehyde and water, or does it apply to any liquid mixture containing formaldehyde? Formaldehyde (CAS No. 50-0-0) is listed with the qualifier "solution" because pure formaldehyde has a tendency to polymerize…

    • Last published:

  • Part 68 regulations compared to other CAA provisions

    Do the risk management program regulations at 40 CFR Part 68 place additional requirements on stationary sources that are currently in compliance with all other provisions of the Clean Air Act (CAA)? Yes. Owners and operators of stationary sources who meet the applicability criteria at 40 CFR §68.10 must comply…

    • Last published:

  • Why do the risk management program regulations only apply to stationary sources?

    Why have transportation activities been exempted from compliance with the risk management program regulations at 40 CFR Part 68? Why do these regulations apply only to stationary sources? While EPA agrees that industry, local planners, and first responders need to recognize the public safety hazards associated with transportation, the Clean…

    • Last published:

  • Threshold determination for a single process with oleum and sulfur trioxide

    Oleum, which is a mixture of sulfuric acid and sulfur trioxide, is listed as a regulated toxic substance in 40 CFR §68.130. Sulfur trioxide is also listed individually as a regulated toxic substance. If a single process consists of one vessel containing oleum and one vessel containing sulfur trioxide, must…

    • Last published:

  • Will the general duty clause be delegated?

    The general duty clause (CAA section 112(r)(1)) is not included in Part 68 and, therefore, will not be delegated to states that have taken implementation of the RMP program. States, however, may adopt their own general duty clause under state law.

    • Last published:

  • RMP Covered Facilities

    Who is covered by the RMP rule under CAA §112(r)(7)? Section 112(r) of the CAA contains several provisions. The two most relevant to the regulated community at this time are Sections 112(r)(1) and 112(r)(7). Owners and operators of stationary sources at which regulated or any other extremely hazardous substances are…

    • Last published:

  • Are methane processes at landfills subject to RMP?

    Some landfills collect methane gas and either vent, flare, or store it for subsequent fuel use. Are methane processes at landfills subject to the requirements of the EPA Risk Management Program? In general, methane processes at landfills will not be covered under the Risk Management Program. Methane that is collected…

    • Last published:

  • Are bulk storage terminals exempt from filing a Risk Management Plan?

    There is no general exemption for bulk storage terminals. However, the threshold exemption for "regulated substances in naturally occurring hydrocarbon mixtures prior to entry into a natural gas processing plant or a petroleum refining processing unit" would exempt certain storage terminals, such as crude oil storage terminals where the regulated…

    • Last published:

  • Do the risk management program regulations cover the loading and unloading of transportation containers?

    Would the risk management program regulations cover the loading and unloading of transportation containers? The definition of stationary source includes transportation containers used for storage not incident to transportation and transportation containers connected to equipment at a stationary source for loading or unloading (40 CFR Section 68.3). In a January…

    • Last published:

  • Which chemicals are covered by the general duty provisions?

    For CAA section 112(r)(1), General Duty, what are the chemicals that are covered? There is no specific list of substances which subject a stationary source owner or operator to the general duty provisions. The general duty provisions apply to owners and operators of all stationary sources which have any "extremely…

    • Last published:

  • How large would a pipe have to be to contain a threshold amount of methane?

    An owner or operator of a stationary source that has more than a threshold quantity of a regulated substance in a process must comply with the requirements in 40 CFR Part 68. How large would a pipe have to be to contain a threshold amount (10,000 pounds) of methane? Assuming…

    • Last published:

  • Can EPA add chemicals to the list of regulated substances under Part 68?

    Can EPA on its own initiative add chemicals to the list, or must it receive a petition from an outside party first and then follow the petition process? EPA may revise the list of regulated substances at the discretion of the Administrator or as a result of petitions. Modifications to…

    • Last published:

  • What is the content of Part 68, Subpart F and when was it promulgated?

    The regulatory text of the June 20, 1996, Risk Management Program Rule ( 61 FR 31668 ) does not include Subpart F. What is the content of Subpart F and when was it promulgated? Subpart F of 40 CFR Part 68 consists of the regulations concerning the list of regulated…

    • Last published:

  • What is the definition of "process"?

    Process, as defined at 40 CFR §68.3, means any activity involving a regulated substance, including any use, storage, manufacturing, handling, or on-site movement of such substances, or combination of these activities. Any group of vessels that are interconnected, or separate vessels that are located such that a regulated substance could…

    • Last published: