U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Navajo Abandoned Uranium Mine Site Screen Report This form is for use at the site of abandoned uranium mines (A UM) located on Navajo Nation lands. Applicable sites include all mine and mine features that have or have not undergone reclamation by the Navajo Abandoned Mine Lands Reclamation Program, including features, adits and pits. Applicable sites also include all A UM sites listed in the USEPA CERCLIS database, all sites listed in the 2008 AUM GIS Report issued by USACOE and USEPA, all AUM sites on allotment lands associated with the Navajo Nation, and any and all A UM sites lands not listed in any database located on Navajo lands. Reconnaissance of any sites located on lands adjacent to Navajo lands but that are or may be impacting Navajo lands will need to be coordinated with the authorities appropriate to those lands. The purpose of the form is to ascertain the status and location of the identified AUM site, to record all immediate site information associated with the mine site and to document the recommendation and/or decision on what additional steps, if any, are needed at the site. Black Jack No. 2 AUM Site Navajo AUM Eastern Region Prepared by: Weston Solutions, Inc. Contract: W91238-06-F-0083 12767.063.496.1111 May 2009 Black Jack No. 2 1 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part I Site Identification, Location and Status Site Names and ID numbers as applicable Mine ID: 319 Map ID: E32 CERCLIS: NNN 000 908 700 NAMLRP: NOT ASSIGNED New Mexico Mining and Mineral Division ID: NM0042 New Mexico Bureau of Geology and Mineral Resources: NNMK0016 Local name / Aliases: Black Jack #2, UNC Chapter and local area: Smith Lake Chapter Lat/Long: 35.532370817 N / -108.254358782 W Nearby road and highway: BIA 1491 (Wolf Canyon Rd) BIA 49 Local Post Office: Thoreau, NM Land Status: check one or more and provide ownership and contact information below Tribal Trust Land I I Tribal Fee Land Q Allotment 15^1 Fee land O Public lands Q Private O Bureau of Land Mgmt Q State EH Ownership and contact information: The mine site property is classified as Indian Allotment land Black Jack No. 2 2 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part II Site Observations Observed Structures: list number of and describe human habitation status of structures at the following distances from mine: 0 to 200 feet: None 200 feet to 0.25 mile: None Observed Public or commercial structure: list and describe all schools, clinics, Chapter Houses, places of business and any other structure used by members of the community at the following distances: 0 to 200 feet: None 200 feet to 0.25 mile: None Levels measured around the perimeter(s) of the identified structure(s): None Observed water sources: list the number and type of wells and surface water sources that are potentially used for human consumption at the following distances from the mine: 0 to 0.25 miles: None 0.25 miles to 4 miles: DWR 16T 519 livestock well Sensitive environments: note and describe all sensitive environments located within visible range of the mine site, including: wetlands, endangered species habitats and approximate locations of sites that may be under protection of the government of the Navajo Nation. None observed Known Site History: include information from interviews with Chapter officials and residents. Homestake Mining Company of California may have some involvement with the mine. Note information on mine ownership, period of operation, and type of mining operation. The Black Jack No. 2 mine consists of a surface area of 55,538.51 square meters with approximately 114,893 square meters of underground workings. Lance Corp operated a well at the mine site. Any historical information pertaining to mining operations and historical ownership of the mine site appeared to be unclear. Black Jack No. 2 3 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part III Type, number and reclamation status of mine features Provide description and reclamation status of all mine sites and features at site. Include all waste piles, adits, pits and other features, and indicate whether they are open, closed, covered, capped, buried or unreclaimed. Indicate approximate size, shape and extent, including description of any reclamation caps. Note condition of all reclamation caps. Reclamation status of the mine sites are currently unknown. No visible signs of reclamation were observed. One large structure remains on site. An subsided area was fenced off and may be a former adit. No waste piles or other mine features were observed during the site visit. Evidence of flooding was observed at the site. Part IV Summary of radiological readings Background Locations #1 19,743 cpm #2 20,412 cpm #3 17,877 cpm Mine site: Black Jack No. 2 - See Figures 1 and 2 Nearby Structure Perimeter - None Describe any other radiological measurements: A total of 3,593 gamma radiation measurements were collected from the mine site, ranging from 11,731 cpm to 904,592 cpm. The measurements are represented in Figures 1 and 2. Black Jack No. 2 4 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part V Site sketch of all mine features and readings, including locations of all structures, sources of drinking water and any other important features and radiological readings. Presented in Figures 1 and 2 Black Jack No. 2 5 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part VI Response Action Summary Site Name(s): Black Jack No. 2 Chapter: Smith Lake Decision Criteria Is there an unreclaimed waste pile at the site? Yes At what distance from the waste pile is the nearest residential structure located? At what distances from the waste pile are there potential drinking water sources? A domestic well is located 1.3 miles to the south east. DWR well T16-509 is a livestock well located 0.5 miles to the east, however the well is posted as non-potable water. Drinking water for the residences in the area is piped in. Is there a reclamation cap or sealed adit in place at the site? No indication of a cap. Possibly one or two sealed adits, one subsidence area was fenced off. Is the cap/seal functionally intact? N/A Is the cap/seal sufficiently degraded to create a concern about releases? N/A At what distance from the cap/seal is the nearest domestic structure located? N/A At what distance from the cap/seal is the nearest domestic drinking water source? N/A Summary of emergency response factors A domestic well is located 1.3 miles to the south east. DWR well T16-509 is a livestock well located 0.5 miles to the east, however the well is posted as non-potable water. Summary hazard ranking system factors None Summary of reclamation factors No known reclamation Black Jack No. 2 6 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Part VII Photos Navajo Al M Project Photo 2. Black Jack No.2 Mine site, small mounds of dirt, towards the southwest Black Jack No. 2 j May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Black Jack No. 2 o May 2009 ------- C.S. Environmental Protection Agency Region IX, San Francisco Navajo Al \I Project .v r Sv- Photo 5. Black Jack No.2 Mine site, fenced subsidence area and possible adit Photo 6. Black Jack No.2 Mine site, subsidence area. Black Jack No. 2 9 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Black Jack No. 2 ^ Q May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Part VIII Contacts Reports and Information Name: Alan Cox Navajo AUM Project Title or official role (if any) Project Manager for Homestake Mining Company of California Telephone number: (505") 287-4456 Information provided: Indicated that Homestake Mine may have some involvement with the operation of Black Jack mines Name Title or official role (if any) Telephone number: Information provided N ameStanlev Edison Title or official role (if any) Navajo EPA Superfund Program Address PO Box 2946. Window Rock. AZ 86515 Telephone number (928") 871-6861 Information provided General Background and Contact/Access Information Name Ms George Padilla Title or official role (if any) Regional Environmental Scientist. BIA. Navajo Nation Telephone number (505") 863-8434 Address PO Box 1060. Gallup. NM 87305 Black Jack No. 2 11 May 2009 ------- Legend Gamma Radiation Measurements • < 2X Backgound > 2X Background Indian Allotment ~ Mine Claim Boundaries I Feet n:-pi mmmm 400 Gamma survey conducted in October 2008 measured as counts per minute (cpm) Average background = 19,344 cpm - < " * . ,V- ^ «» r * w v -k- mmm L — L.11 . : >b||< - K > • ¦ -£f Hi* art , ' V? •» / • ' / s / /j . :——— 'TV'>';1 :¦ ,Yr Kb * •!*<.< * f«4 Gamma Radiation Measurements Above Two Times Background Black Jack No. 2 Smith Lake Chapter Figure Navajo Nation, New Mexico 1 ------- Legend Gamma Radiation Measurements • 0-10,000 • 10,000 -15,000 15,000 -20,000 • 20,000 -50,000 • 50,000 -100,000 • > 100,000 ~ Mine Claim Boundaries I Feet 0 400 odiinrid survey i measured Gamma survey conducted in October 2008 as counts per minute Gamma Radiation Measurements Black Jack No. 2 Smith Lake Chapter Figure Navajo Nation, New Mexico 2 ------- |