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Older pressure treated lumber known as CCA was treated with 3 substances, Chrome, Copper, and Arsenic. Newer treated lumber intended for consumer contact is now treated with different chemicals, such as copper/boron. Lumber NOT intended for consumer contact, such as buried or submerged lumber may still be CCA treated.

PS- it is not a good idea to burn ANY treated lumber. If it kills bugs and fungi, it is likely not real good for you, either.

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15y ago

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