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 (AUM) 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, pits and waste piles. Applicable sites also include all AUM 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 AUM sites not listed in any database located on Navajo lands. Reconnaissance of any sites located on lands adjacent to Navajo lands that 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 A UM site, and record all immediate site information associated with the mine site. Decisions and recommendations on what additional steps are needed will be provided on a separate document. Johnny McCoy 1 AUM Site Navajo AUM Northern Region Prepared by: Weston Solutions, Inc. Contract: W91238-06-F-0083 12767.063.496.1111 August 2010 Johnny McCoy, Mine ID # 188 1 August 2010 ------- 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: 188 Map ID: N10 CERCLIS: NNN000908988 Navajo Abandoned Mine Land Reclamation Program: NA-0509 Local name / Aliases: Johnny McCoy #1 Chapter and local area: Sweetwater Chapter County: Apache State: Arizona Lat/Long: 36.858086207 N / -109.435618479 W Nearby road and highway: Highway 160 Local Post Office: Sweetwater Surface Land Status: check one or more and provide ownership and contact information below Tribal Trust Land ^ Public lands Q Private Q Tribal Fee Land Q Bureau of Land Mgmt Q Allotment Q State O Fee land Q Subsurface Mineral Rights: No information on subsurface mineral rights ownership was found in the EPA/AUM Database. Claim and operator information: The mine site surface land status is classified as Tribal Trust Land. Historical documents showed the operator of the mine as H&H Minerals in 1955. No other historical ownership / lease information was identified in the EPA/AUM database. Number of residential structures within 200 feet of mine: None Estimated volume of mine waste onsite: None Johnny McCoy, Mine ID # 188 2 August 2010 ------- ¦G.S. Environmental Protection Agency Region IX, San Francisco Navajo AtlM Project Part II Summary of radiological readings Highest gamma radiation measurement: 114,582 counts per minute (cpm) Describe any other radiological measurements: A total of 3,142 gamma radiation measurements were collected from the mine site, ranging from 5,710 cpm to 114,582 cpm. Measurements collected in the vicinity of the trench area were found at levels up to approximately 50,000 cpm. The measurements are represented in Figures 1 and 2. Background Locations Average background = 7,749 cpm #1 7,749 cpm Distribution Chart and Statistics: The following chart and statistics were generated by ESRI ArcGIS 9.3.1, and show the general distribution of the site gamma radiation measurements. The horizontal X axis represents the gamma radiation reading levels in cpm (lowest levels to the left). The vertical Y axis represents the frequency of each gamma radiation level. o o o o o o o o o o o 300-- 200-- 100-- u [— 1 1 1 1 5710.00000 32928.00000 60146.00000 87364.00000 114582.0000 Count: Minimum: Maximum: Sum: Mean: Median: Standard Deviation: 52978053.00000 5710.00000 114582.00000 16861.25175 14043.00000 10862.48186 3142 Johnny McCoy, Mine ID# 188 3 August 2010 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part III Status of Reclamation and Mine Waste The following information was obtained from the Navajo Abandoned Mine Land Reclamation Program (NAMLRP) Point Features Database: NAMLRP Status of the mine site: Reclaimed : Yes Waste Pile onsite : No NAMLRP Project Number: NA-0509 NAMLRP Mine features: 1 Rim Strip / Pit, 1 Vertical The following information was obtained from field observations collected during the 2010 site screening: Provide description and 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 caps. Observed reclamation work and status: Adits None Waste Piles None Pits Former trench area in S area of site (covered), 30'x30' Shafts Former shaft area (covered), 25'x25', shaft was estimated to be 10' deep by AML Other Debris and Mine Features None Johnny McCoy, Mine ID # 188 4 August 2010 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part IV Site observations and Environs 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: None 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 Known Site History: include information from interviews with Chapter officials and residents. Note information on mine ownership, type of mining operation, period of operation, known amount of production, and any other information as provided. Johnny McCoy 1 mine consists of an area of 14,498.76 m . The mine was identified as being operational in 1955. Historical documents showed the operator of the mine as H&H Minerals in 1955. While operational, the mine had a total reported production volume of 34 tons. No other historical information or any additional ownership / lease information was identified in the EPA/AUM database. Johnny McCoy, Mine ID # 188 5 August 2010 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part V Response Action Summary Site Name(s): Johnny McCoy 1 Chapter: Sweetwater Decision Criteria Is there an unreclaimed waste pile at the site? No At what distance from the waste pile is the nearest residential structure located? None At what distances from the waste pile are there potential drinking water sources? None Is there a reclamation cap or sealed adit in place at the site? Yes Is the cap/seal functionally intact? Yes Is the cap/seal sufficiently degraded to create a concern about releases? No At what distance from the cap/seal is the nearest domestic structure located? None At what distance from the cap/seal is the nearest domestic drinking water source? None Summary of emergency response factors None Summary hazard ranking system factors None Summary of reclamation factors Site reclaimed by AML in 1997, covered trench and shaft, and removed waste Johnny McCoy, Mine ID # 188 6 August 2010 ------- ¦G.S. Environmental Protection Agency Region IX, San Francisco Part VI Photos Navajo AtlM Project Photo 1. Johnny McCoy 1 site Photo 2. Johnny McCoy 1 site Johnny McCoy, Mine ID# 188 7 August 2010 ------- ¦G.S. Environmental Protection Agency Region IX, San Francisco Navajo AtlM Project Photo 3. Johnny McCoy 1 site, former trench area Photo 4. Johnny McCoy 1 site, former shaft area Johnny McCoy, Mine ID# 188 8 August 2010 ------- ¦G.S. Environmental Protection Agency Region IX, San Francisco Navajo AtlM Project Photo 5. Johnny McCoy 1 site Johnny McCoy, Mine ID# 188 9 August 2010 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part VII Contacts Reports and Information Name: Stanley Edison (928) 871-6861 Eugene Esplain (928) 871-7331 Title or official role (if any) Navajo EPA Superfund Program Address PO Box 2946. Window Rock. AZ 86515 Information provided Lead Regulatory Agency Name: Melvin Yazzie mhyazzie@frontiernet.net Title or official role (if any) Navajo AML - Senior Reclamation Specialist Address Navajo AML - Shiprock Office Information provided Reclamation history Name: Sara Lee Title or official role (if any) Community Service Coordinator - Sweetwater Chapter Address Sweetwater Chapter House Name Title or official role (if any) Telephone number Information provided Johnny McCoy, Mine ID # 188 10 August 2010 ------- Figure 1 - Gamma Radiation Measurements, Above Two Times Background Johnny McCoy 1 (188) Sweetwater Chapter, Navajo Nation r * Johnny McCoy 1 (188) & Legend Gamma Radiation Measurements • < 2X Backgound > 2X Background Gamma survey conducted 06/2010 Measured as counts per minute (cpm) General Direction Down-Slope Mine Claim Boundaries Observed Reclamation Cap Feet 150 \m a Average background = 7,749 cpm ------- Figure 2 - Gamma Radiation Measurements Johnny McCoy 1 (188) Sweetwater Chapter, Navajo Nation f § fl : Johnny McCoy 1 (188) X - fV • \ \ V ¥ 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 —~ General Direction Down-Slope ~ Mine Claim Boundaries Observed Reclamation Cap Gamma survey conducted 06/2010 Measured as counts per minute (cpm) Average background 7,749 cpm /^7Sx r O 'i\ I Feet 150 * 1 -f- r ^ficr+3ron*333 ------- |