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? … HomeRead More »

When using RMP*Comp to conduct an offsite consequence analysis (OCA), a facility must specify the quantity released. What quantity should be entered for a regulated toxic substance in an aqueous solution, the total quantity of the aqueous solution or just the quantity of the toxic substance? … HomeRead More »

The definition of public receptor is “offsite residences, institutions (e.g., schools, hospitals), industrial, commercial, and office buildings, parks, or recreational areas inhabited or occupied by the public at any time without restriction by the stationary source …” Offsite is further defined to include “areas within the property boundary [of the stationary source] to which...

When analyzing the worst-case scenario for regulated toxic substances, must I anticipate a specific cause (e.g., fire, explosion, etc.) of the scenario? … HomeRead More »

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? … HomeRead More »

What if a flammable event has a different time duration than the 5 kw/m2 for 40 seconds? … HomeRead More »

For the worst-case and alternative release scenarios of an underground storage tank, should I consider any impact on groundwater, drinking water, or soil? … HomeRead More »

I am working on the five-year accident history portion of the hazard assessment under the RMP.  Section 68.42(a) tells me to include “all accidental releases from covered processes that resulted in deaths, injuries, or significant property damage on site, or known offsite deaths, injuries, evacuations, sheltering in place, property damage, or environmental damage.”  Is there a definition...

Should the owner or operator include accidental releases from processes containing listed substances below the threshold quantity in the five-year accident history required under the hazard assessment provisions of 40 CFR Part 68, Subpart B, and in the incident investigation requirements under 40 CFR Part 68, Subparts C and D? No. … HomeRead More »

In 2025, I have already challenged three times regarding the proper pressure testing of piping systems. I am unsure where we got off track with this rather simple requirement. First, let’s look at how ASME B31.3 defines “design pressure.” … HomeRead More »

System pressure gauges are often required to provide more accurate system pressure readings than regulator gauges can provide. Pressure gauges: … HomeRead More »

In December 2006, a journeyman pipefitter (P1) was struck in the chest by a pipe cap that he was removing from a pressurized pipe. Some leaks in an 8-inch waterline needed repair. To help find the leak locations, valves were closed off in the lines, creating sectionalized portions of the air-charged waterline. The waterline was pressurized to 80 psig. After pipe repair was completed, the air was released...