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SAN DIEGO – A two-alarm fire ripped through a Kearny Mesa business Wednesday, causing extensive damage and prompting evacuations.

The blaze inside E-Z Flow Foam Systems located in the 8200 block of Ronson Road erupted for unknown reasons shortly after 12:30 p.m., according to the San Diego Fire-Rescue Department.

Crews arrived to find heavy smoke and flames pouring out of the structure, SDFRD spokesman Lee Swanson said. By then, workers had safely gotten out of the burning building and nearby commercial spaces.

It took firefighters about a half-hour to extinguish the blaze.

Jonathan Davis is located in the building next door and was concerned when he realized his neighboring business E-Z Flow Foam Systems was on fire.

“There was just flames coming out of the roll up doors out of the roof. It was a lot of fire,” said Davis. “They’re older buildings…. It’s a lot of lumber in there… and yeah it will spread very quickly.”

“The company sells equipment and supplies to create and apply polyurethane foam. In the course of the routine testing a piece of equipment today, there was a malfunction that started the fire,” Swanson said.

A hazardous-materials team was called in to check the area for toxic substances that may have been released by the heat and combustion, Swanson said.

“A building like this is a concrete tilt up lightweight constructed roof. A large amount of fire when we showed up. So those are concerns for firefighter safety,” Battalion Chief Dan Froelich said. “We have firefighters up working up on a roof that potentially could collapse.”

There were no reported injuries. There was $500,000 worth of damage to the building and $275,000 to it’s contents, Swanson said.

James Train, the E-Z Flow Foam owner, was grateful everyone got out, but is devastated at the loss.

“I’ve lost 15 years of my life. I’ve lost my livelihood,” said Train.