EPA Action Level for Radon -Reply

[Gerald Nicholls <GNICHOLL@dep.state.nj.us>]

It is my understanding that the 4 pCi/L value (assumed to be 0.02 WL)
was consistent with advice EPA had given previously to the states of
Florida and New Jersey with regard to homes in phosphate mining areas
(Florida) and homes build on lots with fill material from uranium ore
processing (New Jersey).  The original advice was apparently based on
the analysis of uranium miner data.

 In New Jersey's case, uranium ore was obtained from the Colorado
Plateau and processed in East Orange (uranium for pottery glaze,
vanadium for stainless steel and radium for phosphoescent paints were
the products).  The fill material was used on lots in West Orange, Glen
Ridge and Montclair.

Gerald Nicholls
NJ Dept. of Environmental Protection

>>> Tom Mohaupt <tom.mohaupt@wright.edu> 08/28/00 09:06am >>>
Hello Radsafers,

Does anyone know where the EPA got the 4 pCi/L (148 Bq/m^3)action
level for
radon? The NCRP recommended 400 Bq/m^3 (actually 2 WLM/year) at a
level
above which mitigation should occur. Did the EPA come up with this
value
themselves or was is a recommendation from the National Academy of
Sciences?
Thank-you,

Tom
-- 
Thomas Mohaupt, M.S., CHP
University Radiation Safety Officer

104 Health Sciences Bldg
Wright State University
Dayton, Ohio 45435
tom.mohaupt@wright.edu
(937) 775-2169
(937) 775-3761 (fax)

"An investment in knowledge gains the best interest." Ben Franklin
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