Lisa Reyenga, P.E., GEI Consultants, Inc.

LNAPL body stability is a prerequisite to a risk-based approach to LNAPL management. Dissolved-phase stability is a key line of evidence for LNAPL body stability, and it can be efficiently evaluated using the free Groundwater Spatiotemporal Data Analysis Tool (GWSDAT).

Evaluating LNAPL body stability is critical to understand potential risks and the potential need for engineered LNAPL remediation. A stable LNAPL body does not have the potential to create new risks as the result of LNAPL migration into new areas. Stable LNAPL bodies are potential candidates for a risk-based and/or natural remediation approach to LNAPL management.

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