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RE: Background Radiation Information Sought
Jim O.
The residential concentration groups are "doses." Is the data set behind
these groups available? It would be interesting to see radon,
terrestrial, and cosmic summed by county. Does this really not exist
anywhere?
On the national map it's easy to see that Iowa is the worst state to try
to find a radon dose-response. There is no low-dose region! Eliminates
the meaningful data in Cohen and other more substantial analyses!? :-)
Now Tennessee would be good! :-) Virginia, but ocean/mountain
confounders; Connecticut has the opposite - hi radon on the ocean side;
Nebraska giant counties and population density problems? Alabama, but
disparate? Who would do Louisianna - all counties low!?
Regards, Jim
============
-----Original Message-----
From: Jim Otton
Sent: Mon 14-Jan-02 11:22 AM
To: Jim Muckerheide
Cc: radsafe@list.vanderbilt.edu
Subject: RE: Background Radiation Information Sought
Jim M,
There is no radon dose information at the USGS site. The USGS role in
radon
studies focused on the geologic causes of variation in indoor radon
levels
and devloping means of estimating the geologic radon potential for the
U.S.
In the work performed by the USGS for the EPA in mapping U.S. radon
potential, we focused on developing geologic estimates of the average
indoor
radon level of residences the U.S. These geologic radon potential
estimates
were published by the USGS in a series of 11 Open-File reports in 1993
and
1995. These 11 reports covered each of EPA's 10 regions plus an extra
report for Guam and Puerto Rico. EPA then used these geologic estimates
to
develop their "Map of Radon Zones"
(http://www.epa.gov/iaq/radon/zonemap.html) in which each county
received a
low, moderate or high (yellow, orange, red) ranking.
Jim Otton
-----Original Message-----
From: Jim Muckerheide [mailto:jmuckerheide@cnts.wpi.edu]
Sent: Friday, January 11, 2002 10:59 PM
To: Jim Otton
Cc: radsafe@list.vanderbilt.edu
Subject: RE: Background Radiation Information Sought
Jim,
Is there radon dose info on this "radon site?" :-)
Any way to add terrestrial to radon doses by location? plus cosmic?
These sources don't address the original question, which would be of
interest.
Regards, Jim
-----Original Message-----
From: Jim Otton
Sent: Fri 11-Jan-02 12:19 PM
To: BERNARD L COHEN; Dave Derenzo
Cc: radsafe@list.vanderbilt.edu
Subject: RE: Background Radiation Information Sought
Dave, Bernard, and all,
The terrestrial gamma component to dose has been estimated for the U.S.
by
Joe Duval (USGS, Reston, VA). A map showing that dose and related maps
showing the apparent concentrations (in ppm or percent) of the U, Th,
and K
components of that dose can be found at
http://sedwww.cr.usgs.gov:8080/radon/DDS-9.html or
http://energy.cr.usgs.gov/radon/radonhome.html These maps are part of
the
USGS' radon webpage. These maps are derived from the NURE aerorad
dataset,
the cosmic-source gamma component was eliminated (upward-looking
crystals
were used in the survey).
Jim Otton
U.S. Geological Survey
Environmental Geology of Radionuclides
-----Original Message-----
From: owner-radsafe@list.vanderbilt.edu
[mailto:owner-radsafe@list.vanderbilt.edu]On Behalf Of BERNARD L COHEN
Sent: Friday, January 11, 2002 7:55 AM
To: Dave Derenzo
Cc: radsafe@list.vanderbilt.edu
Subject: Re: Background Radiation Information Sought
My paper "Indoor radon maps of the United States" might be
useful,
since radon is the dominant contributor to doses from natural radiation,
and it varies much more than does the gamma ray background radiation.
On Fri, 11 Jan 2002, Dave Derenzo wrote:
> Dear Radsafers,
>
> In one of my training classes, I use a very old slide of a US map with
> average background levels for each state. The slide says the source
of
the
> data was EPA. This slide does not include the radon contribution to
the
> ede. I would like to update this slide, but have had no luck in
finding
> more recent information. Can anyone point me to a reference that has
this
> information on a state by state basis? I have already tried NCRP 94,
but
> unless I missed something, this information is not included. A search
of
> the EPA web site also was not productive. Any help would be
appreciated.
>
> Thanks,
> Dave Derenzo, RSO
> University of Illinois at Chicago
>
>
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