Ajax/Magnolia project

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dc.contributor.author Umatilla National Forest (Agency : U.S.)
dc.contributor.author North Fork John Day Ranger District (Or.)
dc.contributor.author EA Engineering, Science, and Technology, Inc.
dc.contributor.author Millennium Science and Engineering, Inc.
dc.date.accessioned 2008-06-24T16:54:41Z
dc.date.available 2008-06-24T16:54:41Z
dc.date.issued 2002-12
dc.identifier.uri http://hdl.handle.net/1794/6672
dc.description 1207 pp. Tables, figures, maps, references, appendices. Section 22, Township 8 South, Range 35.5 East. The two preliminary assessments are dated December 2002; the site inspection is January 2004; the public participation plan is April 6, 2004, and the EE/CA is May 2, 2005. Captured June 18, 2008. en
dc.description.abstract Contains several documents, including abbreviated preliminary assessments of each of the Ajax and Magnolia mines, a site inspection of the two mines, a public participation plan, and an engineering evaluation/cost analysis (EE/CA of the mines, as well as earlier material on clay mineralogy and a sample data summary package. After screening of the waste piles with the Niton XRF unit, the proximity to Lucas Gulch and EPA's APA checklist, both Ajax and Magnolia were recommended for Site Inspection (SI) in the Abbreviated Preliminary Assessments. The SI found high concentrations of metals in the adits and retention ponds of both mines, with rock piles and soil contaminated from AMD, with arsenic migrating downstream from the Magnolia site to the onsite stream station at Ajax Mine. After an EE/CA was recommended, a Public Participation Plan was created and a list of recipients drawn up. Finally, an EE/CA was performed for a proposed CERCLA removal action for the two inactive gold mines. Seventeen metals were found to be ecological threats, some of which threatened spawning and rearing and the migratory pathways of federally-listed bull trout and steelhead, and arsenic created a threat to child recreationists and adult workers. Proposed alternatives include excavation and onsite disposal and adit discharge treatment. en
dc.format.extent 46038662 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.relation.ispartofseries Environmental Remediation Documents en
dc.subject Forest management -- Umatilla National Forest (Or. and Wash.) en
dc.subject Hazardous waste site remediation -- Umatilla National Forest (Or. and Wash.) en
dc.subject Abandoned mines -- Environmental aspects -- Umatilla National Forest (Or. and Wash.) en
dc.title Ajax/Magnolia project en
dc.type Other en

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