Experts trying to prevent a hazardous chemical tank from exploding in Southern California have found a potential crack that may be relieving pressure, a fire official said Sunday.
The tank contains methyl methacrylate, a flammable chemical used in plastics. Officials warned that a rupture could spill up to 7,000 gallons (26,500 liters) of toxic material or cause an explosion.
Evacuation orders were issued Friday for tens of thousands of people in Garden Grove, a suburb south of Los Angeles.
Orange County Fire Authority Interim Chief TJ McGovern said specialists discovered the crack Saturday night, calling it 'positive intel'.
Authorities are working to determine if the crack has actually reduced pressure. Lower pressure could help avert an explosion.
Crews are preparing for a possible spill by constructing barriers to divert liquid into a holding area.
On Sunday, EPA Administrator Lee Zeldin said the most likely scenario is a low-volume release that can be neutralized.
Air monitors have not detected any chemicals or pollutants in Garden Grove.
