Underground Leak Detection in Portland State University District

Acoustic leak detection using ground microphones and listening devices to pinpoint the exact location of the leak.

Tracer gas injection (typically hydrogen/nitrogen mix) and detection for hard-to-find leaks, especially under concrete or asphalt.

Thermal imaging to identify subtle temperature changes indicative of water escaping underground.

Pressure testing of water lines to confirm the presence of a leak and isolate the affected section.

Visual inspection of the property for signs of water damage, erosion, or abnormal plant growth.

Detailed mapping and reporting of the leak's location, aiding in targeted excavation and repair.

The complexity and depth of the leak, as deeper or hard-to-access leaks require more specialized equipment and time.

The type of surface covering the leak (e.g., concrete, asphalt, landscaping), which can increase the effort required for detection and potential repair access.

The number of distinct leaks identified on the property, as each additional leak requires separate pinpointing.

The need for advanced techniques like tracer gas or ground-penetrating radar, which are more resource-intensive than basic acoustic methods.