Radon Question from Occ-Med-Env

["Mcelrath Susan S." <MCELRATHS@rscpo1.wilm.ge.com>]

I copied this message from the occupational medicine BB. Perhaps RADSAFE 
could offer an answer.
*********
Hello,

I am looking for informations about the effectiveness of protective masks
against radon and radon daugthers for workers exposed to concentrations up 
to
3000 Bq/m3 (81 Pico Curies/L).

Are there different ratios of protection ?
What are the prices ?


Thanks in advance for your answers.


Jean-Claude Dessau, md
Medecin conseil
Equipe de sante environnementale
Direction regionale de la sante publique des Laurentides
185, rue Durand
Saint-Jerome (Quebec)
Canada J7Z 2V4

Tel: (514) 436-5669, # 242
Fax: (514) 436-1761
e-mail: jcdessau@InterLink.NET