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  • 1. (Quivira) Ambrosia Lake Site 2 Ambrosia Lake Site (UNC) Church Rock Site Bluewater Site (SOHIO) LBAR Site South Valley Superfund Site Shiprock Site New Mexico (Homestake) Grants Site Gasbuggy Site Los Alamos National Laboratory Lovelace Respiratory Research Institute Sandia National Laboratories - New Mexico Waste Isolation Pilot Plant Gnome-Coach Long-Term Stewardship Site Highlights Ambrosia Lake Site (page 3) Major Activities- disposal cell monitoring Site Size- 116 hectares (288 acres) Start/End Years- 1998/in perpetuity Estimated Average Annual Cost FY 2000-2006- $19,300 Bayo Canyon (page 7) Major Activities- surveillance and institutional controls Site Size- 0.6 hectares (1.5 acres) Start/End Years- 198212142 Estimated Average Annual Cost FY2000-2006- $1,000 Bluewater Site (page 11) Major Activities- disposal cell monitoring; groundwater monitoring; access restrictions Site Size- 1,335 hectares (3,300 acres) Start/End Years- 1997/in perpetuity Estimated Average Annual Cost FY2000-2006- $20,100 Gasbuggy Site (page 17) Major Activities - groundwater monitoring; access restrictions for subsurface contamination Site Size- 259 hectares (640 acres) Surface Start/End Years- 2006/in perpetuity Subsurface Start/End Years- 2014/in perpetuity Estimated Average Annual Cost FY2000-2006- $41,000 Gnome-Coach (page 21) Major Activities -groundwater monitoring; restrictions for access to and use of the subsurface Site Size- 275 hectares (680 acres) Surface Start/End Years- 2005/in perpetuity Subsurface Start/End Years- 2012/in perpetuity Estimated Average Annual Cost FY2000-2006- $38,000 (Homestake) Grants Site (page 25) Expected Activities -groundwater monitoring; disposal cell monitoring and maintenance; erosion control; institutional controls; inspections Site Size- 490 hectares (1 ,200 acres) Expected Start Date- 2015 Current Landlord- Homestake Mining Company Expected Future Landlord- U.S. Department of Energy, Grand Junction Office Los Alamos National Laboratory (page 29) Major Activities- surveillance and maintenance of engineered units; ground and surface water monitoring; institutional controls Site Size- 11,000 hectares (28,000 acres) Start/End Years- 1993/in perpetuity Estimated Average Annual Cost FY2000-2006- n/a (costs begin FY 2007) Lovelace Respiratory Research Institute (page 41) Major Activities - groundwater monitoring; institutional controls Site Size- 55 hectares (135 acres) Estimated Average Annual Cost FY 2000-2006- $140,000 (Quivira) Ambrosia Lake Site 2(page 51) Expected Activities -groundwater monitoring; disposal cell monitoring and maintenance; institutional controls Site Size- 810 hectares (2,000 acres) Expected Start Year- 2015 Current Landlord- Quivira Mining Company Expected Future Landlord- U.S. Department of Energy, Grand Junction Office

2. Long-Term Stewardship Site Highlights Sandia National Laboratories - New Mexico (page 55) Major Activities- groundwater monitoring; vadose zone monitoring; disposal cell maintenance and monitoring Site Size- 1,130 hectares (2,820 acres) Estimated Average Annual Cost FY2000-2006- $900,000 Shiprock Site (page 69) Major Activities disposal cell monitoring; institutional control enforcement; access restrictions; groundwater monitoring Site Size- 42 hectares (105 acres) Start/End Years groundwater- 2012/in perpetuity; engineered unit - 1996/in perpetuity Estimated Average Annual Cost FY2000-2006- $121,000 (SOHIO) LBAR Site (page 75) Major Activities- access control; disposal cell monitoring and maintenance; groundwater monitoring Site Size-162 hectares (740 acres) Start/End Years- 2001/in perpetuity Estimated Average Annual Cost FY2000-2006- $33,657 South Valley Superfund Site (page 79) Site Size- 13 hectares (33 acres) Current Owner- General Electric Start Year- 1966 Expected Future Owner- General Electric (UNC) Church Rock Site (page 81) Site Area- 259 hectares (640 acres) (exact acreage to be transferred to U.S. Department of Energy for long- term stewardship activities is unknown) Current Landlord United Nuclear Corporation Expected Start/End Years 2015/in perpetuity Expected Future Landlord- U.S. Department of Energy, Grand Junction Office Waste Isolation Pilot Plant (page 85) Site Area- 124 acres (50 hectares) Current Landlord- U.S. Department of Energy (DOE) Expected Start-End Years- 2040/in perpetuity Expected Future Landlord- DOE 3. Table of Contents Table of Contents Ambrosia Lake Site ...................................................................... 3 Bayo Canyon ........................................................................... 7 Bluewater Site ......................................................................... 11 Gasbuggy Site ......................................................................... 17 Gnome-Coach ......................................................................... 21 (Homestake) Grants Site ................................................................. 25 Los Alamos National Laboratory ........................................................... 29 Lovelace Respiratory Research Institute ..................................................... 41 (Quivira) Ambrosia Lake Site 2 ............................................................ 51 Sandia National Laboratories-New Mexico .................................................. 55 Shiprock Site .......................................................................... 69 (SOHIO) LBAR Site .................................................................... 75 South Valley Superfund Site .............................................................. 79 (UNC) Church Rock Site ................................................................. 81 Waste Isolation Pilot Plant ................................................................ 85 New Mexico 1 4. National Defense Authol'ization Act (NDAA) Long-Term Stewanlship Report New Mexico 2 5. Ambrosia Lake Site AMBROSIA LAKE SITE 1.0 SITE SUMMARY 1.1 Site Description and Mission The Ambrosia Lake Site is the location of a former uranium milling site that operated between 1958 and 1963, and again in the late 1970s and early 1980s. The site also contains a disposal cell for the uranium mill tailings and other process-related wastes that resulted from operations. The site is located on a 116-hectare (288-acre) tract of land in McKinley County in northwest New Mexico, approximately 40 kilometers (25 miles) north of Grants and 114 kilometers (85 miles) northwest of Albuquerque. The immediate area surrounding the Ambrosia Lake Site is sparsely populated. The site is within the Ambrosia Lake Mining District, near the center of the Grants Mineral Belt. Decommissioned uranium milling sites, LONG~TERM STEWARDSHIP HIGHLIGHTS Major Long-Term Stewardship Activities - disposal cell monitoring Total Site Area- 116 hectares (288 acres) Estimated Volume ofResidual Contaminants- disposal cell 4 million cubic meters (5.2 million cubic yards) Long-Term Stewardship Start-End Years- 1998-in perpetuity Average Annual Long-Term Stewardship Cost FY 2000-2006- $19,300 Landlord- U. S. Department of Energy, Grand Junction Office abandoned underground mines, mine shafts, and ore piles are located near the site. The U.S. Department of Energy's (DOE) current mission at the Ambrosia Lake Site is to perform long-term stewardship activities, including monitoring and maintenance ofthe disposal cell. The former mill site is subject to Title I ofthe Uranium Mill Tailings Radiation Control Act of1978 (UMTRCA). As such, DOE is responsible for remediation and long-term stewardship activities. DOE completed remediation of the site in 1995. The historic mission of the Ambrosia Lake Site was to mill uranium for the United States national defense program. Phillips PetroleumCompany originally owned and operated the mill, which was built in 1957. Uranium ore was processed at the site between 1958 and 1963. The United Nuclear Corporation purchased the mill in 1963 and operated it for a briefperiod. In the late 1970s and early 1980s, United Nuclear Corporation operated an ion exchange system, extracting uranium from mine water. Homestake Mining purchased United Nuclear Corporation's interest in 1981. Processing operations at the site ceased in 1982. 1.2 Site Cleanup and Accomplishments Milling operations at the site created process-related wastes and uranium mill tailings. The tailings originally covered approximately 42 hectares (105 acres). Wind and water erosion spread some ofthe tailings across a 230- hectare (570-acre) area. After remediation activities were completed in 1995, the contamination was restricted to a single 37-hectare (91-acre) onsite disposal cell containing approximately four million cubic meters (5.2 million cubic yards) of contaminated material. No groundwater remediation occurred at the Ambrosia Lake Site. The uppermost aquifer is not usable as a drinking or irrigation water resource because of low yield. Consequently, supplemental standards, as defined in Title 40 of the Code of Federal Regulations Part 192.22, were applied to the site's groundwater. No groundwater monitoring is required at this site. New Mexico 3 6. National Defense Authorization Act (NDAA) Long-Term Ste ardship Report Disposal Cell Ambrosia Lake Site 2.0 SITE-WIDE LONG-TERM STEWARDSHIP 2.1 Long-Term Stewardship Activities D = To Albuquerque, NM (-85 miles) ~ 0.25 0.5 Miles DOE's Grand Junction Office is responsible for long-term stewardship activities at the AmbrosiaLake Site. DOE manages the site according to a long-term surveillance plan prepared specifically for the Ambrosia Lake Site and approved by the U.S. Nuclear Regulatory Commission (NRC). DOE performs long-term stewardship activities, as required under the NRC general license, to maintain protectiveness and regulatory compliance. DOE conducts annual inspections at the Ambrosia Lake Site to evaluate the condition of surface features and to perform mainten

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