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Demonstration of Steam Enhanced Remediaton (SER) at the Port of Ridgefield
This technology evaluation is being conducted by the U.S. Environmental Protection Agency (U.S.EPA) Superfund Innovative Technology Evaluation (SITE) Program. SER is an in-situ thermal treatment soil cleanup technology that will be applied through installation of a steam injection system and an aggressive vapor and liquid extraction system for the reduction of organic contaminants from the source zone. The demonstration will be perfomed at the Lake River Industrial Site (LRIS) located at the Port of Ridgefield (POR) in Ridgefield, Washington. From 1963 to 1993, the former Pacific Wood Treating (PWT) Corporation leased the LRIS from the POR for the purpose of treating milled lumber, utility poles, and pilings. PWT used a variety of wood-treating chemicals including creosote, pentachlorophenol (PCP) dissolved in a carrier oil, chromated copper arsenate, and copper naphthenate. Until the 1980's, the chemicals were allowed to drain freely onto the open ground. The fundamental approach of SER is to sweep the treatment volume with steam and to extract vapor, water and contaminants with extraction wells. During SER, soil, groundwater, and contamination may be heated to temperatures exceeding 100 degrees Celsius. The following primary objective for Phase I of the SER demo is considered critical to the success of the evaluation of the SER technology at the POR, LRIS. The main objective of the SITE demonstration technology is to determine the ability of the SER technology to significantly reduce contaminants of concern (COC) concentrations from the source area and to safely treat and separate effluents, while qualitatively evaluating the ability of the SER technology to control the immediate risk of contaminant migration into Carty Lake and the Ridgefield National Wildlife Refuge (RNWR).
Contact: Marta Richards, USEPA (EIMS#56427)