So I went to the EPA to see what kind of advice they had for people who discover that they have the worst kind of wood on their property: Old railroad ties.
98% of all wood crossties produced in the US and Canada are treated with creosote or creosote and oil blends. In addition to creosote, Pentachlorophenol and Copper Naphthenate (CuN) are approved preservatives for hardwood ties by the American Wood Protection Association (AWPA).
For your next decking project consider using the 7 in. x 9 in. x 8 ft. Used Creosote
Railroad ties, also known as crossties or sleepers, the primary support system are. types of wood that provide sufficient strength to be used as railroad ties.
Relay Ties: Heavy creosote retention (black) with four solid sides. Dry rot and. Wood railroad ties are typically made from hardwoods like Oak. Because they .