Pressure treated lumber is chemically treated to resist rotting, insects, and fungus.
Drilling, sawing, sanding or machining wood products generates wood dust and other substances known to the State of California to cause cancer Avoid inhaling dust generated from wood products or use a dust mask or other safeguards to avoid inhaling dust generated from wood products. Wood products emit chemicals known to the State of California to cause birth defects or other reproductive harm. California Health and Safety Code Section 25249.6