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  • Different results using ALOHA and RMP*Comp

    I tried running the same scenarios in ALOHA and in RMP*Comp. I got different answers. Why? The results you obtain using RMP*Comp may not closely match the results you obtain running the same release scenario in a more sophisticated air dispersion model such as ALOHA or DEGADIS. That's because of…

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  • Guidance for on-site compliance evaluations under CAA §112(r)

    CAA §112(r)(6)(L) provides employees and employee representatives with rights to participate in EPA CAA §112(r) compliance evaluations. What formal guidance is available from EPA regarding the involvement of facility employees and employee representatives in EPA and delegated Agency on-site compliance evaluations conducted under CAA §112(r)? The EPA Office of Land…

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  • RMP Executive Summary Elements

    The owner or operator of a stationary source subject to 40 CFR Part 68 must include an Executive Summary in their Risk Management Plan. What elements must be included in the RMP Executive Summary? Pursuant to 40 CFR §68.155, the Executive Summary must briefly describe the following: accidental release prevention…

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  • Distinction between "process" and "covered process"

    What is the distinction between a "process" and a "covered process" under the risk management program regulations at 40 CFR Part 68? Process 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. A "covered process"…

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  • Worst-case release scenarios for toxics and flammables involving the same process

    At my facility, if the worst-case release scenarios for regulated toxic substances and the worst-case scenario for regulated flammable substances involve the same process, must I analyze both? Yes. If the worst-case release scenarios for regulated toxic substances and regulated flammable substances in Program 2 and 3 processes are associated…

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  • Is the EPA Facility Identifier number the same as the RCRA ID number?

    Owners or operators of a facility subject to the risk management program regulations must include an EPA Facility Identifier number (EPA Facility ID) in their risk management plan (RMP) (40 CFR §68.160(b)(8)). Is this ID number the same as a facility's RCRA ID number? The RMP Facility Identifier is a…

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  • Threshold determination for mixture containing flammable substance and water

    A stationary source has in a process a mixture containing 9,000 pounds of butane and 1,001 pounds of water. The mixture meets the criteria for a National Fire Protection Association flammability rating of 4 (NFPA 4). Is this process covered under the RMP regulations? Yes. Where the concentration of the…

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  • Program Level 2 and 3 compliance audits

    Facilities with Program Level 2 and 3 processes must perform compliance audits at least once every three years (40 CFR §§68.58 and 68.79). How does a facility submit its compliance audit to EPA? Facilities are not required to submit three year compliance audits to EPA; however, facilities should maintain records…

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  • Maintenance requirements for leased tanks

    I use propane as a raw material in my manufacturing process. I lease the tank from the propane supplier. The supplier does all the maintenance. My staff never work on the equipment. What should I do? As part of your contract with the supplier, it would be helpful to gain…

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  • When must an incident investigation be initiated for Program 2 and 3 processes?

    When must a stationary source owner or operator begin conducting incident investigations as required under 40 CFR §68.60 (for Program 2 processes) or 40 CFR §68.81 (for Program 3 processes)? For both Program 2 and Program 3 processes, the incident investigation must be initiated as soon as possible, but not…

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  • Breaking a process into separate units to comply with prevention program requirements

    Do I have to do my hazard review, process hazard analysis, or other prevention activity on the whole process or can I break it into separate units? Once you have determined that you have a covered process, you can divide the covered process any way you want to implement the…

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  • Applicability of compliance audit provisions to emergency response programs

    I have a Program 2 covered process and a Program 3 covered process at my stationary source, and I am required to conduct compliance audits certifying that I have evaluated compliance with my prevention program requirements at least every three years (40 CFR Sections 68.58 and 68.79). Do these provisions…

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  • What does "materials of construction" mean?

    What does “materials of construction” apply to and how do I find this information? You must document the materials of construction for all process equipment in a covered process. For example, you need to know the materials of construction for process vessels, storage vessels, piping, hoses, valves, and flanges. Equipment…

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  • What is the definition of fuel for the purposes of the fuel exclusion for the risk management program?

    A flammable substance listed in 40 CFR §68.130 is excluded from the risk management program regulations when it is used as a fuel or held for sale as a fuel at a retail facility (§68.126). What is the definition of fuel for the purposes of this exclusion? The two prongs…

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  • Are roads considered public receptors?

    A process covered under 40 CFR Part 68 is eligible for Program 1 requirements if it meets all of the criteria listed at 40 CFR §68.10(b). One of those criteria is that the distance to a toxic or flammable endpoint for a worst-case release assessment is less than the distance…

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