On Friday, municipal officials reported the release of low levels of a combustible gas at the site of previous gas releases in Wheatley.
The venting stack in place handled the release and the gas flared off.
Municipal officials said at no point was there any danger to the public.
Chatham-Kent Fire and Emergency Services provided additional resources and air monitoring around the perimeter of the evacuation zone.
A second event occurred later in the evening and steps were taken to ensure ongoing safety including igniting the flare stack to control the gas and staffing up the site for overnight observation.
By 9 a.m. Saturday morning, the gas levels had fallen to the point the stack flare could be extinguished, officials said.
“We are pleased that the mitigation equipment/procedures on site are working exactly as planned and are confident that the current evacuation zone remains secure,” said Ryan Brown, director of public works, in a media release.
