The Ontario Compensation Employees Union said the employer refused to meet on Saturday.
While work is conducted, residents in the area may notice elevated flaring as part of the safety process.
Another round of scientific testing is scheduled to begin at Waste Management's Petrolia Landfill on Oil Heritage Road this week.
St. Joseph's Hospice Sarnia-Lambton Director of Fund Development and Community Relations Maria Muscedere says the event will be held at DeGroot's on November 1.
The London Knights are Memorial Cup champions for the third time after a 4-1 win over the Medicine Hat Tigers Sunday in Quebec.
These announcements come a couple of weeks after the Ontario government signed a similar MOU with Manitoba's government.
