[ RadSafe ] RE: Toxic Countertops

[Edmond Baratta]

John:

I believe the water here comes from a large surface reservoir and 
consequently wouldn't contain much radon.  Unlike some of the well water in 
this area which does
Also having checked my basement, I didn't find any there.

Ed Baratta

edmond0033 at comcast.net
.


----- Original Message ----- 
From: "John R Johnson" <idias at interchange.ubc.ca>
To: "Edmond Baratta" <edmond0033 at comcast.net>; "'radsafelist'"
<radsafe at radlab.nl>; "Dan W McCarn" <hotgreenchile at gmail.com>
Sent: Friday, July 25, 2008 12:14 PM
Subject: Re: [ RadSafe ] RE: Toxic Countertops


> Ed
>
> The radon could be coming in through the shower.
>
> John
> ***************
> John R Johnson, PhD
> CEO, IDIAS, Inc.
> 4535 West 9th Ave
> 604-676-3556
> Vancouver, B. C.
> V6R 2E2, Canada
> idias at interchange.ubc.ca
>
> ----- Original Message ----- 
> From: "Edmond Baratta" <edmond0033 at comcast.net>
> To: "'radsafelist'" <radsafe at radlab.nl>; "Dan W McCarn"
> <hotgreenchile at gmail.com>
> Sent: Friday, July 25, 2008 9:04 AM
> Subject: Re: [ RadSafe ] RE: Toxic Countertops
>
>
>> Sounds good to me!!!  I have one in my bathroom and have detected no
>> increase in radon.
>>
>> Ed Baratta
>>
>> edmondoo33 at comcast.net
>>
>> ----- Original Message ----- 
>> From: "Dan W McCarn" <hotgreenchile at gmail.com>
>> To: "'radsafelist'" <radsafe at radlab.nl>
>> Sent: Thursday, July 24, 2008 3:24 PM
>> Subject: RE: [ RadSafe ] RE: Toxic Countertops
>>
>>
>>> Gentlemen:
>>>
>>> It all depends on the permeability of the granite!  Even relatively
>>> active
>>> granites usually have very low primary permeability so radon is retained
>>> within the mineral grains and rock itself to a great degree.  That's why
>>> granites are usually in secular equilibrium with all uranium daughters
>>> because they retain radon until it decays.  Most of the activity
>>> measured by
>>> a scintillation counter comes from the Bi-214 decay at the end of the
>>> chain.
>>> At a larger scale, where granites are fractured and faulted and develop
>>> significant secondary permeability, is there a good likelihood that
>>> radon in
>>> significant quantities will be fluxed via changes in barometric pressure
>>> to
>>> the surface, and these examples are noteworthy.
>>>
>>> But in countertops, chosen to avoid fractures, that is unlikely.  Most
>>> of
>>> the radon would be only from the very near surface.  The radon from
>>> deeper
>>> inside would have virtually no chance of diffusing to the surface.
>>>
>>> My opinion only!
>>>
>>> Dan ii
>>>
>>> Dan W. McCarn, Geologist; 3118 Pebble Lake Drive; Sugar Land, TX 77479;
>>> USA
>>> HotGreenChile at gmail.com   UConcentrate at gmail.com
>>>
>>>
>>> -----Original Message-----
>>> From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
>>> Behalf
>>> Of Bob Cherry
>>> Sent: Thursday, July 24, 2008 1:30 PM
>>> To: 'Chris Cherry'
>>> Cc: 'radsafelist'
>>> Subject: [ RadSafe ] RE: Toxic Countertops
>>>
>>> Good point about the cemeteries! I will remember this and try to avoid
>>> spending a lot of time in one as long as I can.
>>>
>>> -----Original Message-----
>>> From: Chris Cherry [mailto:cpdcherry@]
>>> Sent: Thursday, July 24, 2008 1:24 PM
>>> To: Bob Cherry
>>> Subject: RE: Toxic Countertops
>>>
>>> I'm sure more people are harmed in quarrying the stone and installing it
>>> than get cancer from its radioactivity.
>>>
>>> Someone on the medphys list mentioned that cemeteries are full of both
>>> granite and dead people.  This may not be a coincidence.
>>>
>>> -CC
>>>
>>>
>>> --- On Thu, 7/24/08, Bob Cherry wrote:
>>>
>>>> From: Bob Cherry
>>>> Subject: RE: Toxic Countertops
>>>> To: "'Chris Cherry'"
>>>> Date: Thursday, July 24, 2008, 1:18 PM
>>>>
>>>> Old news. We almost got a
>>>> consulting job on this.
>>>>
>>>> -----Original Message-----
>>>> From: Chris Cherry
>>>> Sent: Thursday, July 24, 2008 1:15 PM
>>>> To: Bob Cherry
>>>> Subject: Toxic Countertops
>>>>
>>>> The article mentions the guy at Rice.
>>>>
>>>>
>>> <http://www.nytimes.com/2008/07/24/garden/24granite.html?pagewanted=2&_r=1&n
>>> o_interstitial>
>>>>
>>>> -CC
>>>
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>>
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>
>