An exhaust system includes first and second exhaust pipes each of which has an upstream end communicating with an engine and a downstream end. A list of candidate interpretations is generated, and each candidate interpretation is subdivided into time-based portions, forming a grid. These include estimates of the bulk volume irreducible of fluids in the formation. A controller is operably connected to the feed assembly and controls the operation of the strapping machine. Further, a communication module may be utilized to establish the communication data link between one communication device and another communication device subsequent to determining that another communication device is reachable by a terminal over the wireless data link.