CPM technicians used the provided quarter section map to add the pipeline sections to connect the various segments between loggers on the map. Several areas illustrated a high confidence of leak presence based on the acoustic data.The loggers bracketing this section of pipe both returned very high leak scores. Additionally, three separate correlations occurred (points at which both loggers detected leak noise at the same location). This level of evidence is highly suggestive of a leak or leaks and warrants further investigation with the Gutermann AQUASCAN TM2 system. The logger score of 56 between the two higher scores suggests multiple leaks may be occurring in this area. Additionally, the loggers bracketing (confidential location) returned moderate scores warranting further investigation. Lastly, the loggers bracketing (confidential location) (scores of 77 and 57) did not correlate but the scores are high enough for additional surveying. The data collected by the loggers at each of the locations dictated further investigated with the TM2 system.

Based on the data collected by the 820 loggers, the TM2 system was deployed such that the sensors bracketed the segment of pipe where 820 correlations occurred or at locations where logger scores were moderate/high. Once in place, the system runs for 15-20 minutes to ensure that enough data is collected to make an accurate judgment of the presence of a leak or leaks. For additional quality control, several TM2 surveys are performed to ensure any potential leaks are repeatable. The software presents the approximate distance of the leak between the two TM2 sensors as well as the confidence rating. An output from the TM2 software for each survey performed was included in the final deliverables. The bracket distance includes any bends or alignment changes in the pipe, as opposed to a straight line between sensors. GPS coordinates included were approximate, and CPM field technicians marked the locations via spray paint during the investigation.