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Assurance Monitoring

  Assurance Monitoring provides site managers and workers with the assurance that their site remains leak-free and in compliance with state regulators whether there has been a history of leaks or not.  HGI specializes in applying geophysical characterization methods to create a better understanding of both impacted and non-impacted surface and subsurface characteristics.

Assurance Monitoring is the easiest way to maintain compliance with regulators…

HGI’s assurance monitoring technology utilizes innovative geophysical electrical methods to detect or monitor for fluid leaks from containment ponds and structures to ensure compliance while keeping operations up and running.  The solution associated with a leak will change the electrical structure of the subsurface in proximity to the leak location.  HGI can detect and map the source of the solution using the appropriate electrical method for the specific environment of the project.  . The majority of our methods can be conducted strictly from the surface without the need for costly and time consuming excavations, thus minimizing survey costs, infrastructure maintenance, and time.  We also manufacture our own electrical systems for long term, real-time monitoring, which provides the highest level of reliability against leak risk.   For example, HGI designed the 180-Channel Geotection Resistivity System specifically to capture real-time changes in dynamic systems such as long-term leak detection monitoring.

Assurance Monitoring_Liner Leak

Assurance Monitoring illustration showing confirmed localized leak areas

Assurance Monitoring services include:

  • Permanent leak detection and location installations beneath bottom liners for containment ponds

 

  • Surface or subsurface containment structure (storage tank, pipeline) leak detection monitoring

 

  • Safety monitoring of heaps for stability

 

  • Environmental monitoring of heaps and liners for fluid containment

Case Study:

HGI currently provides permanent, real-time monitoring to the Department of Energy (DOE) for nuclear waste storage tanks.  The tanks fall under the risk spectrum as low probability, high consequence.    The DOE Hanford Site in eastern Washington is home to 177 underground storage tanks, used from 1943 to 1986, to store waste generated during uranium processing.  Many of the tanks have been confirmed, or assumed, to have leaked.  The DOE is currently managing waste transfer to safer tanks, and monitoring tanks during the retrieval processes is critical. HGI was chosen for monitoring after a rigorous testing and competition phase, and our electrical geophysics monitoring program to detect leaks has been in place since May of 2004. The monitoring program takes advantage of changes in resistivity that will occur should a tank leak.  As the data are acquired and processed, trends are evaluated for leaks and a web-based alarm system is in place should a leak occur providing around the clock, real-time assurance monitoring.

Assurance Monitoring_Hanford Tank

Leak Detection & Monitoring Illustration