What is addressed is the problem of dialing telephone numbers stored in the memory of a telephonic device at inopportune andor inappropriate times for the contacts in question. At a receiver, the virtual channel table transmitted from the transmitting side is parsed, thereby determining whether the current received channel is an active or inactive channel. The device determines a target stimulation frequency based on the difference between a first frequency and the maximum frequency. In the consolidation tanks the contaminate is further separated and collected for disposal. The back plate is located at a position that is flush with or slightly below the surface in which the footing is buried.