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. Section 33 AUM Site Navajo AUM Eastern Region Prepared by: Weston Solutions, Inc. Contract: W91238-06-F-0083 12767.063.496.1111 May 2009 Section 33 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: 1040 Map ID: E41b CERCLIS: NNN 000 908 748 NAMLRP: NOT ASSIGNED New Mexico Mining and Mineral Division ID: NM0059 New Mexico Bureau of Geology and Mineral Resources: NMMK0247 Local name / Aliases: West Ranch (Railroad Land), Moe No. 5, Old Moe, Moe Mine, Moe #5, Moe decline Chapter and local area: Casamero Lake Chapter Lat/Long: 35.4906103257 N / -108.0166273 W Nearby road and highway: Route 19, Casamero Lake Loop Road Local Post Office: Prewitt, NM Land Status: check one or more and provide ownership and contact information below Tribal Trust Land I I Tribal Fee Land Q Allotment I I Fee land O Public lands Q Private ^ Bureau of Land Mgmt Q State EH Ownership and contact information: The mine site property is classified as private land owned by Lynn "Buddy" Elkins, but no residences were found within 0.25 miles of the site Section 33 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: None Observed 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. The mine was closure was the result of a fatality at the mine. Note information on mine ownership, period of operation, and type of mining operation. The Section 33 mine consists of an area of 11,004.93 square meters and an undetermined extent of underground workings. Any historical information pertaining to mining operations and historical ownership of the mine site, other then Cobb Nuclear, appeared to be unclear. Section 33 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. Numerous waste piles were observed at the site and some former unidentified workings. No adits or shafts were observed during the site visit. Part IV Summary of radiological readings Background Locations #1 16,630 cpm #2 17,128 cpm #3 16,882 cpm Mine site: Section 33 - See Figures 1 and 2 Nearby Structure Perimeter Describe any other radiological measurements: A total of 1,550 gamma radiation measurements were collected from mine sites, ranging from 14,322 cpm to 140,917 cpm. The measurements are represented in Figures 1 and 2. A rock from a waste pile emitted over 800,000 cpm. Section 33 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 Section 33 5 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part VI Response Action Summary Site Name(s): Section 33 Chapter: Casamero 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? 0.8 mile Is there a reclamation cap or sealed adit in place at the site? No 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 None Summary hazard ranking system factors None Summary of reclamation factors No known reclamation Section 33 6 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Part VII Photos Navajo Al M Project Photo 1. Section 33 Mine site, towards the north Section 33 7 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Photo 3. Section 33 Mine site, wooden hopper and pulverized waste rock pile located at southeast corner of mine Photo 4. Section 33 Mine site, Uranium ore exhibiting over 800,000 cpm Section 33 8 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Photo 5. Section 33 Mine site, pulverized waste rock piles. Section 33 9 May 2009 ------- U.S. Environmental Protection Agency Region IX, San Francisco Navajo AUM Project Part VIII Contacts Reports and Information Name: Title or official role (if any) Telephone number Information provided: 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 Title or official role (if any) Telephone number Information provided Section 33 10 May 2009 ------- w Legend Gamma Radiation Measurements • < 2X Backgound > 2X Background ~ Private ~ Indian Allotment Mine Claim Boundaries I Feet 0 200 Gamma survey conducted in October 2008 measured as counts per minute (cpm) Average background = 16,680 cpm Gamma Radiation Measurements Above Two Times Background Section 33 Casamero Lake Chapter Fjgure Navajo Nation, New Mexico 1 ------- tsRWt 1 r jF SF jgp \ A • 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 Feet 0 200 Gamma survey conducted in October 2008 measured as counts per minute Gamma Radiation Measurements Section 33 Casamero Lake Chapter Figur Navajo Nation, New Mexico 2 ------- |