Emergency Planning and Notification; Emergency Planning and List of Extremely Hazardous Substances and Threshold Planning Quantities
other · Rule · Published 2012-03-22 · Effective 2012-04-23 · 77 FR 16679
Document
Document number
2012-6910
Federal Register citation
77 FR 16679
CFR reference
40 CFR 355
Type
Rule
Action
Final rule.
Category
other
Publication date
2012-03-22
Effective date
2012-04-23
EPA docket
EPA-HQ-SFUND-2010-0586
Abstract
The U.S. Environmental Protection Agency (EPA or the Agency) is taking final action to revise the manner for applying the threshold planning quantities (TPQs) for those extremely hazardous substances (EHSs) that are non-reactive solid chemicals in solution. This revision allows facilities subject to the Emergency Planning requirements that have a non-reactive solid EHS in solution, to first multiply the amount of the solid chemical in solution on-site by 0.2 before determining if this quantity equals or exceeds the lower published TPQ. This change is based on data that shows less potential for non-reactive solid chemicals in solution to remain airborne and dispersed beyond a facility's fence line in the event of an accidental release. Previously, EPA assumed that 100% of non-reactive solid chemicals in solution could become airborne and dispersed beyond the fenceline in the event of an accidental release.