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Author	Lucia Athens Green Building Team Chair City of Seattle Lucia.athens@seattle.gov www.cityofseattle.net/sustainablebuilding

The analytical approach is fundamentally flawed, in that it looked at too narrow a category of building materials. PVC is a material that contains PBT’s, (Persistent Biological Toxins). There are many other building materials and products with PBT’s, including mercury thermostats. As such, no one material or PBT should be singled out, rather all building materials containing PBT’s should have been the focus of the analysis and of a possible credit. Therefore, if the Precautionary Principle is not directed by the Board, the TSAC should be redirected to examine the impacts and risks of PBT containing materials versus those that do not contain PBT’s. This more broad approach puts the Council in a much more strategic position, and one that does not single out any industry sector.

U.S. Green Building Council