What are the precautions I should take when working with pressure treated wood for outdoor projects?

 Lumber that was pressure treated with Chromated Copper Arsenate (CCA)has not been definitively determined to pose any unreasonable risk to the public or the environment by the EPA. But one of the components of the substance,arsenic, is a known human carcinogen. For more information, please go to the following link.

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Lumber Pressure Treated With Chromated Copper Arsenate
The health and environment risk of CCA treated lumber
URL: http://www.dec.ny.gov/chemical/8790.html