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Remedial Project Manager
The Former Martin-Marietta Aluminum Reduction Facility (the Site) is located in The Dalles, Oregon, west of the Columbia River. The Site was used for aluminum production activities from 1958 to 1984. During operations, contaminants such as cyanide, fluoride, and polynuclear aromatic hydrocarbons (PAHs) were released to environment. These releases resulted in soil and groundwater contamination. The Site is currently owned by the Lockheed Martin Corporation.
In 1987, the Site was listed as a Superfund site and placed on EPA’s National Priorities List (NPL). Superfund is also known as the Comprehensive Environmental Restoration, Compensation, and Liability Act (CERCLA). From 1989 to 1992, cleanup of the Site was performed with additional cleanup activities occurring in 1994. Cleanup consisted primarily of consolidating waste in two onsite landfills and placing a soil cover over a pond area that received liquid waste. In 1996, the Site was deleted from the NPL, but cleanup activities to maintain the landfills and former pond area continue and will be needed as long as there is waste left on the Site. Groundwater sampling is also conducted on an annual basis for the Site. Features of the Site include the CERCLA landfill and leachate tank, RCRA Landfill, and the Scrubber Sludge Pond area.
Cleanup Decision Documents
The first cleanup decision for the Site consisted of excavating and consolidating waste and contaminated soil into an existing unlined landfill (identified as the CERCLA landfill); capping the waste with a multi-media cover; constructing a soil cover over the scrubber sludge pond area; plugging and abandoning nearby production wells and connecting users to the City of The Dalles water supply; collecting and treating leachate generated from the landfill and from shallow groundwater; conducting groundwater monitoring to make sure contamination in groundwater is not above levels that would present an unacceptable risk to human health or the environment. The remedy also included institutional controls such as deed restrictions and fencing to assure protection of human health and the environment which are explained in the Record of Decision (ROD) for the Martin-Marietta Aluminum Co. (PDF) (34 pp, 79K) - (1988).
The second cleanup decision for the Site was issued in 1994 through an Explanation of Significant Differences (ESD) (PDF) (12 pp, 35K). The ESD addressed leachate issues and three units that were taken out of active operations. Three additional units were the Lined Pond, the Discharge Channel and the Recycle Pond. As part of the additional activities, sludge from the Discharge Pond and Recycle Pond were consolidated in the scrubber sludge pond area. Sludge from the Lined Pond was disposed of in the existing CERCLA landfill. In addition, the leachate collection system (LCS) was upgraded and a Cyanide Destruction System (CDS), consisting of a 300,000 gallon tank (referred to as the CERCLA tank) was constructed to treat the leachate.
Five-Year Review Documents
A CERCLA five-year review is conducted when there is contamination left in place at a site. The purpose of the five year review is to ensure the cleanup remedy selected is still protective of human health and the environment. Although cleanup at the Site was considered complete in 1996, five-year reviews must be performed due to the presence of the CERCLA landfill and former pond area. Previous five-year reviews were conducted in 1994, 1999, and 2005. The fourth five-year review for the Site was issued in 2013. Although this review was delayed, the next review is still scheduled for 2015 and will continue to be issued every five years.
Combined RCRA and CERCLA Report (PDF) (258 pp, 9.5MB) - 2012. The most recent consolidated report to address RCRA and CERCLA requirements. These reports are issued annually.
Air Sampling and Monitoring Data Report (PDF) (68 pp, 2.7MB) - 2012. This report shows the results of air sampling conducted in 2012. Two sets of air sampling were conducted for the Site in 2012 and 2013. The results of the 2013 sampling work will be posted once it is complete.