The company will test and remove asbestos and other potentially harmful materials inside the building, while a 90-day delay is in effect for the demolition of the walls of the building.
First Selectman Robert Mallozzi praised the Meridan-based firm for the convenience and efficiency it provides in the process.
"They're local [and] they have their own laboratory," he said. "They don't have to wait for the test to go out."
The town hall project remains on schedule, with demolition to occur at some point in March.
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