As we continue to operate our aging pipeline infrastructure, problems caused by their leaks and the resulting spills also continue to grow. Today a typical leak is not found by the systems deployed to detect them. Instead they are found by individuals - usually third parties - that visually observe the spilled product. The failure in detection leads to large spills with large associated costs, both in terms of third-party damages and in terms of reputation. A new external leak detection system was recently developed utilizing industrial internet of things (IIoT) and machine learning technologies. The system can be deployed without contact with the pipeline, and hence easily installed on an existing underground pipeline. Small (