NEWARK -- The cause of a reported oil leak Friday morning at a Newark recycling company, where 70 employees were evacuated due to potential fire hazard, remains under investigation, officials said.
A broken pipe containing "superheated oil" was reported about 8:43 a.m. at the Evergreen Oil facility at 6880 Smith Ave., Alameda County fire spokeswoman Aisha Knowles said.
A hazmat team and two dozen firefighters responded and crews contained the leak about 10 a.m., Knowles said.
One person was evaluated and treated at the scene for a complaint of pain, Knowles said. No other injuries were reported.
The worker treated at the scene, according to a statement released late Friday afternoon from Evergreen Oil, was evaluated for exposure and later released by a medical facility and then returned to work.
An Evergreen Oil spokesperson said all employees returned to work shortly after the incident.
"Working quickly and relying on their emergency training, the Evergreen operations team evaluated the situation and immediately called Alameda County Fire as a precaution," according to the release. "The plant is now in a safe and stable condition as we investigate the release and continue to work closely with the City of Newark and Alameda County Fire Department."
The company recycles and re-refines waste oil and stores other waste disposal items.
Earlier this year, firefighters were called to the scene of a minor accident
In March 2011, an explosion and fire injured an employee at the same business. Cal/OSHA fined Evergreen Oil nearly $22,000 and issued four citations in connection with the fire.