A level 3 shelter-in-place that was ordered Wednesday morning in Contra Costa County, was an accident sent from the Shell refinery in Martinez, according to officials.
Contra County Costa County Fire Inspector George Laing told NBC Bay Area that the alarm, set off just after 7 a.m. was simply a mistake.
The order, however, caused immediate concern. Two days earlier in Richmond, the Chevron refinery had a real level 3 shelter-in-place, when a massive fire erupted and burned for five hours at that plant.
