[Greenbuilding] Radionuclies in water...

[Gordon Howell -- Howell Mayhew Engineering]

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 From a colleague with EPCOR Water in Edmonton:

Health Canada publishes guidelines for radionuclides and EPCOR must 
ensure they are met. As far as I know we don't do radionuclide tests 
in house; the samples are sent to external labs (probably to the 
SRC). The official statement in last year's report is:

EPCOR performs monitoring and testing well above the minimum required 
by the regulatory approval. For example, Health Canada recommends 155 
samples be collected from the distribution system each month for 
bacteriological testing for a city the size of Edmonton. However, on 
average, 234 samples were collected monthly. In 2011, the EPCOR Water 
Laboratory carried out more than 113,000 tests on 100 parameters (47 
inorganic/physical, 47 organic and 5 microbiological) for Edmonton 
water. Another 5,000 tests were done on 222 additional parameters 
(211 trace organics and eight radionuclides) by external commercial 
laboratories.
EPCOR EnviroVista Champion Report 2011 Page 11 of 34.

Most concerns I've read about are related to radon in ground water 
sources. I'm not aware of any such issues in the Edmonton area.
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+Gordon Howell 
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