Mar 25, 2025 · Several substances on the list of extremely hazardous substances (EHSs) have two threshold planning quantities (TPQs) listed in 40 CFR Part 355, Appendix A. When would a facility …

In situations where a substance is listed on both the extremely hazardous substance list and the regulated toxic substance list, the lower of the threshold planning quantities (TPQ) shall apply.

Any EHS present at your facility in an amount equal to or greater than its TPQ triggers the emergency planning requirements of this subpart. The TPQs are listed in Appendices A and B of this part in the …

For instance, if a facility has 500 pounds of sulfuric acid used in wastewater treatment and 600 pounds of sulfuric acid in an electric forklift battery, reporting is required because sulfuric acid is present at …

What does TPQ stand for? TPQ abbreviation. Define TPQ at AcronymFinder.com.

Looking for online definition of TPQ or what TPQ stands for? TPQ is listed in the World's most authoritative dictionary of abbreviations and acronyms.

Apr 18, 2025 · How can a facility determine whether it has present an amount of an extremely hazardous substance (EHS) which equals or exceeds the threshold planning quantity (TPQ)?

Apr 18, 2025 · The Agency assigned chemicals to threshold planning quantity (TPQ) categories based on an index that accounts for the toxicity and the potential of each chemical, in an accidental release, …

Mar 28, 2025 · Extremely hazardous substances (EHSs) that are in solid form are subject to one of two different threshold planning quantities (TPQs), a lower level or 10,000 pounds (40 CFR 355.15). Why …

Mar 24, 2025 · The TPQs are based on acute mammalian toxicity and potential for airborne dispersion and represent those quantities of substances that can cause significant harm should an accidental …