Chemical Process Safety (PSM/RMP)

Ammonia present in ammonium hydroxide and RMP TQ Determination

Must a stationary source owner or operator consider the amount of ammonia present in ammonium hydroxide that is contained in a process when determining whether the threshold for ammonia is exceeded? The list of regulated toxic substances at 40 CFR Section 68.130 includes BOTH “ammonia (anhydrous)” and “ammonia (conc 20% or greater)” but does not […]

Once again EPA attempts to explain their CONCENTRATION QUALIFIERS concept

I have written often about this topic and it is without a doubt the most questioned/challenged topic in my 5-Day Advanced Process Safety course.  Several toxic substances are listed as regulated substances under 40 CFR §68.130 with CONCENTRATION QUALIFIERS (e.g., “conc 37% or greater”).  The four(4) regulated substances that have concentration qualifiers are: Ammonia (conc

Modications to pressure/vacuum relief devices allows for catastrophic failure of container

HAZMAT containers used for flammable, corrosive, and toxic liquids and gases will have a pressure/vacuum relief valve to prevent damage to the tank from changes in the internal pressure. These valves MUST be inspected and maintained in line with the manufacturer’s instructions.  Some valve designs require a special tool to dismantle them for servicing. Investigations

How many Flammable Cabinets can I have inside a single control area?

This question causes quite the debate during our audits/assessments! My record is 27 full-size cabinets in a single control area. It was actually inside a single, but large room that had NO fire ratings. And when I began to question the number and load of flammables in the room, you would have thought I shot

Ventilation System Design basis?

We do a lot of work in flammable atmospheres so yes we have rather high standards for what “minimal compliance” looks like.  We recently came across this situation while performing an assessment for a facility that has suffered from a flash fire months earlier.  During our walk-thru of the area (they knew we were coming)

OH EPA updates their Accidental Releases Prevention Program Rules

The Ohio Environmental Protection Agency, Division of Air Pollution Control (DAPC) has adopted amended rules in Ohio Administrative Code (OAC) Chapter 3745-104, “Accidental Releases Prevention Program” Rules. The rules in this chapter establish Ohio’s Accidental Release Prevention Program. These rules were promulgated after Ohio received the delegation of authority from USEPA in December 1999 for

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