"We have mitigated the risk, we believe, in terms of further material leaving this facility," Southern said. He said the company didn't know how much had leaked.
The tank that leaked holds at least 40,000 gallons, said state Department of Environmental Protection spokesman Tom Aluise, although officials believe no more than 5,000 gallons leaked from the tank. Some of that was contained before escaping into the river, Aluise said.
Freedom Industries was ordered Friday night to remove chemicals from its remaining above-ground tanks, Aluise added.
The company was already cited for causing air pollution stemming from the odor first reported Thursday, Aluise said.
The primary component in the foaming agent that leaked is the chemical 4-methylcyclohexane methanol. The spill has forced businesses, restaurants and schools to shut down and forced the Legislature to cancel its business for the day.
Gov. Earl Ray Tomblin said the Federal Emergency Management Agency and several companies were sending bottled water and other supplies for residents.
"If you are low on bottled water, don't panic because help is on the way," Tomblin said.
By Saturday morning, more than a dozen truckloads of bottled water had arrived in the affected counties and was being distributed to residents at volunteer fire departments, community centers and other sites.
County emergency officials reported no problems at the sites, with the exception of one in Kanawha County that had to be moved Friday because of traffic congestion.
"Everybody's been pretty patient with us," Greg Lay, Boone County emergency services director, said Saturday.
"Like most things that happen, we're into it enough now that everybody's ready for it to be over," he said.
At a Kroger near a DuPont plant along the Kanawha River, customers learned the grocery store had been out since early Friday.
Robert Stiver was unable to find water at that and at least a dozen other stores in the area and worried about how he'd make sure his cats had drinkable water.
"I'm lucky. I can get out and look for water. But what about the elderly? They can't get out. They need someone to help them," he said.