U.S. Attorney Jenny Durkan in Seattle said Friday that the decision to close the case without charges was shared with victims’ relatives earlier in the day.
Federal criminal investigators and prosecutors examined whether federal criminal environmental and worker safety laws and regulations had been violated.
The U.S. Chemical Safety Board released its final report on the blast in May. It blamed the facility’s safety culture, industry standards and state and federal oversight for the catastrophic rupture of a heat exchanger at the refinery.
The board called for more conservative standards for the use of carbon steel and called on the state of Washington to adopt more rigorous safety management standards.
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