A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines adapted to selectively transmit mechanical power to an output member. In more particular, but not by way of limitation, the present invention relates to an integrated method for remediating subsurface contaminants through the use of a low concentration surfactant solution followed by an abiotic polishing process to thereafter achieve a substantially reduced subsurface contaminant concentration that surfactant flushing alone cannot achieve. The authenticator application obtains a current time value from a clock of the electronic item or an authentication value from the authentication service, retrieves predetermined indicia of the electronic item from a location thereon, and combines the obtained value and the retrieved indicia of the electronic item to generate the token value.