Families were allowed to return to their homes after a hazardous chemical leak at a nearby company near the Fayette-Jessamine County line.

Nearby commercial buildings and about a dozen homes in the Tuscany Valle subdivision were evacuated as a precaution when a leak was discovered in a 2,400-gallon tank of "a mixture of nitric acid" at Aulick Chemical Solutions on Eisenhower Court, said John Carpenter, emergency management director for Jessamine County.

Vapors were visible early Monday night, but they began dissipating about 9 p.m. The tank was delivered earlier in the day with a slow leak, according to some media reports. Carpenter said there was "a failure in the piping" that caused the leak.

There were no injuries, Carpenter said.

The Bluegrass Emergency Response Team, including units from Clark, Woodford, Fayette and Garrard counties, responded. Crews used a containment truck with a vacuum to clean up the chemical.

Aulick Chemical's website says the company provides chemicals for water treatment and wastewater treatment plants, and products such as industrial cleaners, paint strippers, solvents and degreasers.

Karla Ward: (859) 231-3314. Twitter: @HLpublicsafety.