If mitigation is chosen as the option, consider working with a
contractor in the National Radon Safety Board (NRSB) or the
American Association of Radon Scientists and Technologists
(AARST) National Radon Proficiency Program (NRPP).   Use the
following guidelines in selecting a mitigating contractor, or
consult the "Consumer's Guide to Radon Reduction."  How to
Select a Contractor  Get Estimates! Choose a contractor to fix a
radon problem just as you would choose someone to do other home
repairs. It is wise to get more than one estimate, to ask for
references, and to contact some of those references to ask if
they are satisfied with the contractors' work. Also, ask your
county or state consumer protection office for information about
the contractors. Use the following checklist when evaluating and
comparing contractors and ask the following questions:  Compare
the contractors' proposed costs and consider what you will get
for your money. Take into account the following: a system that
is less expensive to inst