Trc Environmental Corporation

Rmt Limited

Thomas R Stolzenburg

John M Rice

Marianne D Duner

A groundwater treatment system for collecting a non-aqueous-phase liquid (NAPL) in a flow path of contaminated water in a body of water, the contaminated water moving toward a permeable reactive barrier (PRB) including a treatment agent for treating the contaminated groundwater. The groundwater treatment system including a collection layer positioned up-gradient of the PRB and permeable to the NAPL and the contaminated water. The collection layer including a NAPL collecting element to inhibit the NAPL from flowing to the PRB.

Device and method for trapping non-aqueous-phase liquids prior to a permeable reactive barrier for the treatment of contaminated groundwater

Devices and methods for preventing migration of buoyant contaminants from subaqueous contaminated sediment while providing for venting of gas that migrates from the contaminated sediment are described.

Devices and methods for trapping non-aqueous-phase liquids and venting gas from subaqueous sediment

A method for treating a recalcitrant organic contaminant in contaminated soil or waste includes the steps of (1) maintaining indigenous bacteria or microbes in the contaminated soil or waste at a population level below which the indigenous bacteria or microbes are able to interfere with the enzyme while the enzyme acts against the contaminant and (2) exposing the contaminated soil or waste to an enzyme for a time sufficient to decrease the amount of the recalcitrant organic contaminant in the soil or waste. If the soil or waste also includes one or more readily degradable organic chemical, the method can include the additional step of reducing the content of the readily degradable organic chemical in the soil or waste.

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Madison, WI, United States of America

Thomas R Stolzenburg