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ActiveSET.org
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http://www.activeset.org
Directory of stack monitoring firms in Canada and the USA.
Trace Analytics Inc.
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http://www.airchecklab.com/
Accredited analytical laboratory specializing in the testing and analysis of compressed breathing air used for life-support.
Chester LabNet
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http://www.chesterlab.net/
Offers inorganic analysis of air samples, including source emissions, ambient and indoor air, with filters available for personal use. Lists methods, and customer services available in Tigard, Oregon.
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