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Philadelphia, PA · Final report 2022-10-11
CompletedPA
At approximately 4 am on Friday June 21, 2019 there was a release of vapor in the PES refinery alkylation unit. The vapor found an ignition source, causing a fire and multiple explosions. 
The U.S. Chemical Safety and Hazard Investigation Board (CSB) is an independent federal agency that investigates serious chemical accidents to determine root causes and issue safety recommendations. It has no regulatory or enforcement authority — its power is the public investigation.
CSB investigation page ↗Source: U.S. Chemical Safety Board. License: CC0 1.0. Related: EPA RMP facilities nearby.