SALINA, Kansas -- Officials now know what chemical caused some Salina homes and businesses to be evacuated Tuesday night and Wednesday morning.
Some people in the area of North Santa Fe and 7th Street in the north part of town noticed a bad odor and called authorities.
Local officials as well as the Kansas Department of Health and Environment responded.
They found a spilled liquid and took it in for testing.
The KDHE says the substance was Mercaptan, an odorant used to give natural gas a recognizable scent. Officials say the substance poses minimal risk.
Cleanup of the chemical and the contaminated soil is expected to be complete on Friday.
Until then, nearby residents may still notice the odor.
It's recommended that people consider keeping their doors and windows closed and limit outdoor activity when there's a strong odor present.
The source of the spill is under investigation.