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USAEHA TG 146.pdfDwg 13064136.pdf
The attached documents will clarify some misinformation circulated regarding wood preservative treatments.
Wood treated with pentachlorophenol is indicated by a "P" marking (Ref USAEHA TG 146 attached). Pentachlorophenol is no longer used as a wood preservative and has been replaced by alternatives such as Copper-8-quinolinolate, zinc naphthenate, and copper naphthenate.
IAW Dwg 13064136 these alternative treatments that are currently authorized can be recognized by the following markings -
A PS Magazine Article (PS 677) as well as the DA Pam 742-1 22Nov2016 erroneously indicate that PA, PB & PC are pentachlorophenol treated.
APHC Technical Guide 146 dated January 2017 can be found at https://phc.amedd.army.mil/Pages/Library.aspx?Series=PHC+Technical+Guide. It addresses Pentachlorophenol, Creosote and Chromated Copper Arsenate.