“This is a dynamic situation, and we’re learning as much as we can as time unfolds,” Georgia Department of Transportation Commissioner Russell McMurry said during a news conference Friday at the fire site.
Officials suspected the blaze started when PVC products stored under I-85 caught fire.
Still, McMurry didn't attribute the fire to the surplus construction material being stored there.
He said the material was a high-density plastic conduit used for cabling and fiber optic wire networks. He said GDOT was trying to get a fix on exactly how long the material had been there, and suggested it could be as long as 11 years.
But he described it as non-combustible and said it’s not uncommon for states to store materials under bridges.
That material doesn’t ignite on its own, McMurry said.
“It’s no different than having a plastic cup in your cupboard ... needs something to ignite it,” he said.