During natural gas emergencies, which of the following is NOT a necessary recording for ground probes?

In the context of natural gas emergencies, it is crucial to maintain accurate and timely records of certain parameters to ensure safety and effective response. Among these parameters, time, location, and concentration of the gas are essential for understanding the situation and coordinating a proper response.

Recording the time is vital as it helps responders assess the timeline of the incident and track changes over time. The location is equally important, as it allows responders to pinpoint where issues are occurring and manage resources effectively. Concentration measurements provide critical information about the level of danger present; understanding the concentration of natural gas is necessary for assessing risks.

Temperature, while it might provide some contextual information, is not typically a required recording during natural gas emergencies in the same way that the other three parameters are. Thus, it is not considered a necessary recording when focusing on immediate safety and response measures following a natural gas incident. This distinction highlights the priority placed on the most relevant information needed to address these emergencies effectively.