Firefighters continue monitoring a fire that sparked Monday at an old dump site between Lompoc and Buellton. 

Personnel from the Santa Barbara County Fire Department responded to the incident on the 600 block of Mail Road just before 12:30 p.m. Monday, Capt. Scott Safechuck said. 

While crews quickly stopped the fire’s forward progress at 1.5 acres, they remained on scene through the night and will continue to stay at the site through Tuesday, Safechuck said.

That’s because the blaze occurred at a 15-year-old dump site with debris piles up to 30-feet deep, he added. 

Firefighting personnel including a battalion chief, hand crew, engine crews and heavy equipment operators worked overnight to ensure the fire doesn’t escape into the surrounding brush, Safechuck said. 

He said firefighters will remain at the site since the fire still poses a major threat to the dry brush in the nearby State Responsibility Area (SRA) or land deemed especially vulnerable to wildland fire.

The cause of the fire remained under investigation, he added.