CA Health & Safety Code Section 106790

This article does not apply to a person in any of the following circumstances:

(a)

The person is testing for, or mitigating radon in a building that the person owns or occupies.

(b)

The person is designing or conducting mitigation measures to prevent against radon infiltration or accumulation in new construction.

(c)

The person is performing scientific research regarding testing or mitigation of radon, but only if the person informs the owner and the occupant of the building of all of the following:

(1)

That the person is not certified by the National Radon Measurement Proficiency Program of the National Environmental Health Association or the National Radon Safety Board Certified Radon Professional Program.

(2)

Any test results are neither certified nor valid for legal purposes.

(3)

Any mitigation methods suggested or used are experimental.