GASES have been found below the surface in soil near Chinchilla but government experts say there is no threat to health.
Government testing of two properties in Hopeland found carbon monoxide, hydrogen and hydrogen suphide in soil deeper than 2m below the surface.
Anyone wanting to excavate or do anything with their land that may affect dirt at that depth, should contact the department beforehand.
Department of Environment director-general Jon Black said Queensland Health have confirmed there is no risk to health.
"Indepedent environmental experts have advised immediate impacts to grazing animals and stock are extremely unlikely as the gases are located below the root zone in the soil," he said.
"The gases identified are commonly associated with combustion and are not associated with coal seam gas development."
Landholders were this morning given an indication of where more testing and investigating would be done.
Mr Black said the department would "fully investigate" the findings.
"Risks to human health, livestock and crops will be continually assessed and relevant landholders will be advised immediately should any risks be identified."
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