Can trees be used to replace an existing pump-and-treat (P&T) system and maintain plume capture?

ETIC – Brent Searcy P.E. presented at the 2018 Society of Wetland Scientists Conference.

ETIC is in the process of making such a transition at a site in California’s Central Valley. After taking over management of a hydrocarbon impacted site with an operating P&T system, an evaluation of options indicated that a phytoremediation option could save the client $3-5 million dollars over the duration of the project. The phytoremediation option can have multiple benefits, including remediating impacted soils above the water level as well as maintaining groundwater plume control, through water uptake and evapotranspiration by water-hungry trees.

ETIC’s Brent Searcy P.E. presented results from two stages of pilot testing at the Society of Wetland Scientists Conference (May 2018) in Denver, Colorado, which ETIC supported as a sponsor. The presentation titled “Considerations and Challenges in Implementing Phytoremediation at a Hydrocarbon Impacted Site” described how groundwater modeling, sustainability, and cost considerations were used to determine that plume capture could be achieved using a cost effective sustainable remedial alternative. The presentation also showed how site geochemical conditions were addressed with specific mitigation measures.

ETIC prides itself on finding the most efficient and cost-effective solution to address our client’s needs. This project is an example of that commitment.

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