Chemical release reported at Valero plant

HOUSTON The small explosion spewed vapor into the air early Monday and led officials to ask residents to remain indoors.

Valero Energy Corp. spokesman Bill Day said four workers were taken to the hospital for evaluation, but the sulfur release was quickly contained.

He said officials do not believe the loading tank fire poses any further threat to the community.

Debris was scattered on the ground below where the tank ruptured in the Manchester area of east Houston, near the Houston Ship Channel. But the cause of the fire is under investigation, Day said.

The Houston refinery makes gasoline and gas derivatives.

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