A chemical tank failure in May has been investigated, with findings showing it was deemed unfit for service 10 months prior. An inspection contractor had determined the tank was not suitable for continued use at that time. The tank was located at a paper mill in Washington state.

Further details about the incident and investigation are available from the source. The inspection contractor's assessment was made before the tank's failure, which occurred in May.

The source provides more information about the events surrounding the chemical tank failure.