TCE at Department of Defense Landfill Site


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Subsurface investigations at this 40-acre Northern California Department of Defense (DOD) landfill site revealed elevated levels of TCE in site soils and groundwater. This discovery was made through routine site monitoring, as regulated by the state of California solid waste landfill regulations. Regulators required site cleanup to reduce chlorinated hydrocarbon concentrations below state of California Maximum Contaminant Levels (MCLs). Therefore, trichloroethylene (TCE), dichloroethylene (DCE) and vinyl chloride (VC) concentrations were required to be reduced below 5 ug/L, 6 ug/L and 0.5 ug/L respectively. A detailed feasibility study of the site revealed enhanced biological degradation to be the best remedial option. MACTEC, consultant to the DOD, selected Hydrogen Release Compound (HRC®) to properly and effectively enhance the biodegradation process. HRC was chosen at this site because it is
a low-cost and proven, in situ bioremediation technology. It also offers the added benefits of quick remediation timeframe, minimal site disturbance, no operations and maintenance, and no aboveground piping and or machinery often associated with ex situ and other mechanical systems.

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