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RE: Selenium in sewers

Selenium is a common ingredient in cold bluing formulations for treating and coloring (blackening) metals like gun barrels.
A contact at Birchwood Casey indicated whether bluing is done by hand or via use of a dip tank, rinses generally follow.

-----Original Message-----
From: Jeff Cantin [mailto:jcantin@tiac.net]
Sent: Friday, January 28, 2000 11:07 AM
To: p2tech@great-lakes.net
Subject: Selenium in sewers

I have a colleague who is looking for clues as to potential sources of
elevated selenium levels in a military base sewer system.  There are
apparently minimal industrial sources, i.e. no electroplating or coal
firing.  The base is host to a large housing complex... any potential
residential sources?  

Jeff Cantin
ERG, Inc.
Lexington, MA 02424-3136