This module requires trainees to perform an outside leak investigation in a two-block residential neighborhood environment. Trainees receive a customer-initiated work order for a possible outside gas leak and are then required to perform an outside leak investigation using interactive tools. These interactive tools include using a combustible gas indicator, a plunger bar (e.g., bar-hole), rock drill, and others. If a gas leak is located, trainees will then need to pinpoint the leak and zero it out in all four directions. In addition, trainees will need to classify the gas leak based in its proximity to structures and concentration levels.