The small explosion around 1 p.m. led to the breach, which emitted sulfur into the air. A fire also started but was quickly extinguished. The Los Angeles County Sheriff's Department asked residents who live within a quarter-mile of the facility at 2300 E 223rd St. to shelter in place.
All residents within a quarter mile radius of Tesoro Refinery are asked to shelter in place. Please avoid the area https://t.co/gq7BaZl7uD— LASD Carson Station (@CarsonLASD) August 26, 2016
The shelter-in-place order was lifted after 6 p.m.
County and refinery officials said the levels of chemicals released into the air were not considered toxic to local residents and the shelter-in-place order was made just as a precaution.
Alameda Street between Sepulveda Boulevard and 223rd Street was closed for several hours, reopening Friday evening.
No serious injuries were reported.