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Sediment Removal and Bioremediation Reactive Wall at Mare Island

Mare Island

Farallon identified and remediated an area of hydrocarbon-impacted soil and groundwater originating from historical U.S. Navy operations on Mare Island. A 2,000-foot area of subsurface piping and a 6-foot-diameter cooling water loop leading to the sensitive receptor bay water was found to be the source of contamination.

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Following a feasibility study that identified the best solution to remediate the concerns, Farallon conducted a pilot study to test the effectiveness of in-situ bioremediation, along with a removal action of hydrocarbon-impacted sediments in the cooling water loop that was submerged below groundwater. Sediments were vacuumed out along the 400-foot length of pipe and treated to separate out the hydrocarbon using a settling and separation water tank, followed by a gravity and centrifugal system. The remaining groundwater contamination was treated with an in-situ injection of an aerobic bioremediation compound.

To protect against future long-term migration to the bay, a reactive barrier wall will be installed. Groundwater monitoring wells are being sampled to evaluate the efficacy of the remedy and meeting the site closure criteria.


Services Utilized

Construction Support

Our work is integrated with redevelopment design and construction at project sites that have involved deep excavations, steep slopes, and critical habitat areas. Our ability to conduct cleanup actions concurrently with redevelopment...

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Contaminated Site Investigation and Cleanup

Over the past 20 years we have developed a top-tier team of technical professionals including experts in contaminant fate and transport characterization, modeling, and remediation engineering who have successfully developed and...

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Sediment Services

We have specialized expertise in designing sediment investigations where sediments have been impacted by a wide range of contaminants including metals, refined petroleum compounds, polynuclear aromatic hydrocarbons, pesticides, and...

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Meet Our Experts

Henry_Pietropaoli Henry Pietropaoli Senior Geologist

Henry has over 30 years of experience conducting environmental site investigations, endangerment assessments, contaminant remediation, hazardous waste management, construction, and real estate development...

smiling-farallon-employee-with-short-gray-hair-and-dark-glasses Richard Makdisi Principal Geochemist

Richard is a Principal Geochemist and has more than 36 years experience in hazardous management, geoscience engineering, geochemistry, and geohydrology. Richard has hands-on experience managing regional and site...

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