Disclosed is a strippable floor coating which includes an undercoat layer to be applied to a floor surface, and a strippable overcoat layer over the undercoat layer. The method comprises treating the surface of a fabric in structured sheet making applications using compositions containing hydrophobic quaternary amines in combination with other hydrophobes and surfactants. The second transducer is positioned so that it is proximate the first transducer when the mandrel is positioned in the drill collar. One implementation of the invention pertains to functional testing, and another implementation of the invention pertains to pertains to site analysis.