Some Aurora residents are still displaced, after bricks fell off their apartment building this weekend.
Walls are covered with mold and ceilings are caving in. There are also concerns about exterior walls bowing out.
One building is "structurally compromised" and another is "full of mold," officials said.
According to the Agency for Toxic Substances and Disease Registry, TCE is "used as a solvent for cleaning metal parts."
At least 24 people who lived in a Hobart apartment building must now find new places to live after their homes were abruptly closed by the city.