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West virginia

  1. 1. Parkersburg Site West Virginia Long-Term Stewardship Site Highlights Parkersburg Site (page 3) Major Activities- disposal cell monitoring; groundwater monitoring; access restrictions; inspections; maintenance Site Size- 6.06 hectares (15 acres) Stat1-End Years- 1983/in perpetuity Estimated Average Annual Cost FY2000-2006- $16,400
  2. 2. Table of Contents Table of Contents Parkersburg Site 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 West Virginia 1
  3. 3. National Defense Authorization Act (NDAA) Long-Term Stewardship Report West Virginia 2
  4. 4. Parkersburg Site PARKERSBURG SITE 1.0 SITE SUMMARY 1.1 Site Description and Mission The Parkersburg Site is the location of a former uranium mill and currently contains an engineered disposal cell. The six-hectare (15-acre) site is located eight miles southwest ofParkersburg, West Virginia. The land surrounding the site is primarily agricultural and industrial, with some residential use, and is moderately populated. Contamination of the site resulted from previous mining and milling operations. Some of the zirconium ore processed at the Parkersburg Site was radioactive. The initial process used at the site generated waste material that was pyrophoric (capable of causing fires and explosions). Waste materials were stored in drums that subsequently deteriorated and leaked, resulting in soil contamination. Approximately 3,000 drums of ore, waste, and contaminated soil were disposed ofoffsite LONG-TERM STEWARDSHIP HIGHLIGHTS Major Long-Term Stewardship Activities - disposal cell monitoring; groundwater monitoring; access restrictions; inspections; maintenance Total Site Area- 6.06 hectares (15 acres) Estimated Volume ofResidual Contaminants- disposal cell 15,300 cubic meters (20,000 cubic yards) Long-Term Stewardship Start-End Years- 1983-in perpetuity Average Annual Long-Term Stewardship Cost FY 2000- 2006- $16,400 Landlord- U.S. Department of Energy, Grand Junction Office in 1968. The remaining contamination was consolidated in an onsite engineered disposal cell. The grass- covered, gently sloping disposal cell occupies an area of approximately five hectares (12 acres) and rises to a maximum height of approximately three meters (nine feet). American Metals Climax (AMAX) completed remediation of the site in 1983. The DOE Grand Junction Office is the present landlord at the site. The current mission for the Parkersburg Site is maintaining and monitoring the onsite disposal cell. The historic mission ofthe site was to produce zirconium metal for use in the construction of nuclear reactors for the U.S. Navy. The Carborundum Company developed the Parkersburg site in 1957. AMAX assumed ownership of the plant in 1967, becoming the U.S. Nuclear Regulatory Commission (NRC) licensee to process and possess radioactive ores and waste materials at this location. According to the provisions ofthe Nuclear Waste Policy Act of1982 (NWPA), the site was transferred to DOE in 1994 for long-term monitoring and maintenance. 1.2 Site Cleanup and Accomplishments Remediation ofthe site was completed by AMAX in 1983, which consisted of demolishing site structures and burying contaminated structural materials, radioactive soils, and pyrophoric materials in the onsite engineered disposal cell. Less than 15,300 cubic meters (20,000 cubic yards) of waste are contained in the disposal cell. The precise volume of the waste is unknown since the design drawings of the cell were not provided to DOE at the time of site transfer. The disposal cell is capped with clay and revegetated with grasses to prevent erosion. To date, no groundwater contamination has been detected at the site. Groundwater samples determined that groundwater complies with the State of West Virginia's groundwater standards and with the Federal Safe Drinking Water Act. West Virginia 3
  5. 5. National Defense Authorization Act (NDAA) Long-Term Steardship Report @ GroundWater Monitoring Well To Parkersburg (-7 miles) :,. 0 0.1 0.2 Miles Parkersburg Site 2.0 SITE·WIDE LONG·TERM STEWARDSHIP 2.1 Long-Term Stewardship Activities Long-term stewardship activities at the Parkersburg Site began in 1983, prior to the site's transfer to DOE. The site was transferred to DOE 1994, and DOE is now responsible for conducting all long-term stewardship activities at the site. A two-meter (six-foot) tall locked fence surrounds the site, controlling access to the disposal cell. To prevent human exposure to the buried waste, no drilling or other intrusive activities are allowed on the property, except for installation of additional groundwater monitoring wells. Boundary monuments define the six corners of the legal boundary ofthe site property. Warning signs are placed at intervals along the security fence around the site perimeter. Six groundwater monitoring wells are located around the perimeter of the stabilization mound and inside the security fence. A total of six wells are located in the north (three wells), west-central, south-central, and northeast parts of the site. DOE's responsibility for the safety and integrity of the Parkersburg site will continue in perpetuity. Site records are kept in permanent storage at the DOE Grand Junction Office in Colorado. The types of records maintained include site characterization data, remedial action design information, the radiological assessment, long-term monitoring plans, annual inspection reports, and current and historic monitoring data. West Virginia 4
  6. 6. 2.2 Specific Long-Term Stewardship Activities Engineered Units The contaminated materials were placed on concrete building slabs located over the buried pyrophoric waste and covered with a cap. The cap was designed to minimize radionuclide leaching, reduce radon emissions, prevent erosion and dispersion of the contaminated materials, and eliminate the potential for contact with pyrophoric wastes. A layer ofcompacted clayey soil was placed over the waste, followed by a layer of low-permeability clay. A layer of compacted topsoil was placed over the clay cap to protect it from weathering and erosion, followed by a layer of uncompacted topsoil to support the grass cover. A clay- filled barrier trench was constructed around the perimeter of the stabilization mound to protect it from horizontal Parkersburg Site STAKEHOWER INVOLVEMENT Community interaction has been minimal since the remediation was completed by the private owner in 1983. When the site is inspected annually, the inspectors meet with the adjacent land owner(s) to determine if any issues of concern exist. Copies of the annual inspection report are distributed to the local library and any stakeholders requesting them. The report is also published on the DOE Grand Junction Office website at www.doegjpo.com. movement of offsite shallow groundwater. In addition, a shallow drainage furrow was constructed to channel water away from the mound. Long-term stewardship activities include annual site inspections of the disposal cell and minor maintenance activities, such as fence repairs, sign replacement, and cap maintenance. DOE will perform long-term stewardship activities at the disposal cell, including access restrictions, in perpetuity. Groundwater Site characterization by DOE in 1994 showed that groundwater beneath the site was not contaminated. As a best management practice, DOE monitors groundwater at five-year intervals to ensure the integrity of the disposal cell in perpetuity. 2.3 Regulatory Regime Long-term stewardship activities at the Parkersburg Site is governed by several regulations, including the Nuclear Waste Policy Act (NWPA), Section 151(C); the Atomic Energy Act of 1954, as amended; and the National Environmental Policy Act of 1969, as amended. Section 151(C) of the NWPA, required that if low-level radioactive waste is the result of a licensed activity to recover zirconium, hafnium, and rare earth metals from source material, DOE shall assume title and custody of the site if requested by the site owner. The need for continued groundwater monitoring at the Parkersburg Site was evaluated in accordance with DOE Orders 5440.1E, "National Environmental Policy Act (NEPA) Compliance Program," and 5400.1, "General Environmental Protection Program." 2.4 Assumptions and Uncertainties DOE assumes that groundwater monitoring will continue to occur at five-year intervals in perpetuity. Because the site has been monitored for almost 20 years, the long-term stewardship activities at the site are well known and are not expected to change dramatically. Sound scope and cost estimates for the long-term stewardship activities at the site have been developed. West Virginia 5
  7. 7. National Defense Authorization Act (NDAA) Long-Term Stewardship Report 3.0 ESTIMATED LONG-TERM STEWARDSHIP COSTS AMAX made a one-time payment of $230,000 to the U.S. Treasury in January 1994, as required under the NWPA to cover the costs associated with long-term stewardship activities at the site. Long-term stewardship costs for the site are relatively constant, with slight spikes every fifth year due to costs from groundwater monitoring. Site Long-Term Stewardship Costs (Constant Year 2000 Dollars) Year(s) Amount Year(s) Amount ' ~ Year(s) Amount FY 2000 $15,923 FY2008 $15,300 FY 2036-2040 $88,000 FY2001 $15,700 FY 2009 $22,900 FY 2041-2045 $88,000 FY 2002 $15,400 FY 2010 $15,300 FY 2046-2050 $88,000 FY 2003 $14,800 FY 2011-2015 $80,300 FY 2051-2055 $88,000 FY 2004 $22,500 FY 2016-2020 $80,200 FY 2056-2060 $88,000 FY 2005 $15,300 FY 2021-2025 $82,300 FY 2061-2065 $88,000 FY 2006 $15,100 FY 2026-2030 $87,100 FY 2066-2070 $88,000 FY 2007 $15,400 FY 2031-2035 $88,000 4.0 FUTURE USES The future use of the site will be restricted to monitoring and maintaining the disposal cell in perpetuity. For more information about the Parkersburg Site, please contact: Art Kleinrath, Long-Term Surveillance and Maintenance Program Manager U.S. Department of Energy, Grand Junction Office 2597 B3/4 Road, Grand Junction, CO 81503 Phone: 970-248-6037 or visit the Internet website at http://www.doegjpo.com West Virginia 6