There treated with cca , copper chromted ARSENIC! Don't burn them!
That's the new, pressure treated poles, the same as all pressure treat. Don't burn it, don't sand it, don't cut it without a particle mask or respirator. It's so much more eco-friendly than creosote!
If the poles were only treated with creosote they are not a problem to burn. Its the same stuff as the creosote in your chimney. It actually burns pretty clean..
The creosote used to treat poles is a coal-tar product and is carcinogenic. It's not the same compound as the buildup in your chimney, which is also called creosote. The coal-tar creosote is safe to burn in a furnace designed for it, providing complete combustion (much like burning tires). Don't burn it in an open fire, it will not be completely oxidized and it is carcinogenic.
From Wikipedia:
"Creosote is the portion of chemical products obtained by the
distillation of a
tar that remains heavier than water, notably useful for its
anti-septic and
preservative properties.
[1] It is produced in some quantities from the burning of wood and coal in
blast furnaces and
fireplaces; commonly found inside chimney flues when the wood or coal burns incompletely, producing soot and tarry smoke, and is the compound responsible for the preservation and the flavor of meat in the process of
smoking. The name is derived from the Greek
kréas (κρέας), meaning "flesh", and
sōtēr (σωτήρ), meaning "preserver".
[2]
The two main types in industrial production are
wood-tar creosote and
coal-tar creosote. The coal-tar variety, having stronger and more toxic properties, has chiefly been used as a preservative for wood, while the wood-tar variety has been used for meat preservation, wood treatment, and for medicinal purposes as an
expectorant,
anti-septic,
astringent,
anaesthetic and
laxative, though these have mostly been replaced by newer medicines. Coal-tar creosote had also, in the past, been used as an
escharotic to burn malignant skin tissue and in dentistry to prevent necrosis but no longer is used that way because of its
toxic,
carcinogenic properties and because better and safer treatments are now available. Varieties of creosote have also been made from both
petroleum and
oil shale called
oil-tar creosote, when derived from the oil tar, and
water-gas-tar creosote when derived from the water gas tar. Creosote also has been made from pre-coal formations such as
lignite, yielding
lignite-tar creosote and
peat, yielding
peat-tar creosote."