Comment by athoun

If you’re in an apartment building, moving to a higher floor would help as it affects the basement and first floor the most.

If you’re in a house, the same mitigations for radon exposure would likely work to reduce TCE as well.

Regularly ventilating your home may also help keep the levels down.

Lastly, there are typically many years of exposure required before you notice any symptoms. So moving would be another viable option.