The hazmat spill in the Fallston area on Friday may have leaked as much as 100 gallons of heating oil into a tributary of the Little Gunpowder Falls, the county's hazmat chief said Tuesday.

The Maryland Department of the Environment originally said the home heating-oil tank leaked 45 to 50 gallons.

The leak was reported to MDE at about 1 p.m. and was said to originate in the 400 block of Wilgis Road, near the intersection of Routes 1 and 152, MDE spokesman Jay Apperson said.

He said the 275-gallon tank had a small hole in the bottom.

Mike Brunicke, chief of Harford County's Hazmat Team, said the hearing oil got into the Wildcat Branch stream but did not make it very far until it was contained. He said the fuel did not make into the Little Gunpowder.

Brunicke said he does not expect any serious environmental impact from the spill.

"We controlled most of it," he said. "I don't think it will be a big impact."

He said the hazmat team put down an absorbent boom as a precaution and does not expect to need additional precautions.

MDE does not conduct the cleanup, but Brunicke and Apperson said the state will arrange the cleanup with a contractor or the homeowner.

ange the cleanup with a contractor or the homeowner.