scope:

This standard is employed to determine the penetration depth of pentachlorophenol [sometimes abbreviated "penta"] containing preservatives where the wood has been treated with pentachlorophenol dissolved in light-colored Hydrocarbon Solvent Type A or Hydrocarbon Type C of AWPA Standard P9 into treated wood to decide whether the treated product meets acceptance levels as prescribed in treatment standards.

The penetration of pentachlorophenol dissolved in darkcolored Hydrocarbon Solvent Type A should be judged by visual examination without staining.

The method is not suitable for determining the penetration in redwood heartwood.

This methodology usually detects pentachlorophenol to 0.64 kg/m³ (0.04 pcf), but certain cases have been documented which indicate non-detection at retentions up to 3.52 kg/m³ (0.22 pcf).