CSB approves ‘landmark’ Tesoro report
Anacortes, WA – The Chemical Safety Board on May 1 approved what board chair Rafael Moure-Eraso called a “landmark” report on an April 2010 explosion at the Tesoro refinery in Washington state.
Seven workers died in the tragedy. CSB determined the cause of the blast was a long-term, undetected, high-temperature hydrogen attack of the steel equipment, which led to a vessel rupture and massive release of flammable hydrogen and naphtha.
“These findings – and similar ones we have made in other refinery investigations – have led us to recommend sweeping changes to the regulatory system,” Moure-Eraso said in a statement on the report.
Recommendations include improving how refineries are regulated on the federal and state level, such as the Environmental Protection Agency requiring inherently safer systems analysis and the hierarchy of controls, and the Washington legislature enhancing its process safety management regulatory framework.