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RE: Background Radiation Information Sought
Jim,
I think Iowa is the best state to perform a radon epidemiology study.
You do Not want certain areas high and certain areas low. Maybe for an
ecologic study, but not for a case control study. What you want is a wide
range of radon exposures so that you are able to get a dose response
relationship. If you look at the Iowa study, that is what they have - a
very nice wide distribution of exposures. The distribution is still log
normal in Iowa, so there are many low measurements.
Les Crable
>From: "Jim Muckerheide" <jmuckerheide@cnts.wpi.edu>
>Reply-To: "Jim Muckerheide" <jmuckerheide@cnts.wpi.edu>
>To: "Jim Otton" <jkotton@usgs.gov>
>CC: <radsafe@list.vanderbilt.edu>
>Subject: RE: Background Radiation Information Sought
>Date: Mon, 14 Jan 2002 12:16:00 -0500
>
>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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