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dc.contributor.authorUmatilla National Forest (Agency : U.S.)
dc.contributor.authorNorth Fork John Day Ranger District (Or.)
dc.contributor.authorEA Engineering, Science, and Technology, Inc.
dc.contributor.authorMillennium Science and Engineering, Inc.
dc.date.accessioned2008-06-24T16:54:41Z
dc.date.available2008-06-24T16:54:41Z
dc.date.issued2002-12
dc.identifier.urihttp://hdl.handle.net/1794/6672
dc.description1207 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.abstractContains 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.extent46038662 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.relation.ispartofseriesEnvironmental Remediation Documentsen
dc.subjectForest management -- Umatilla National Forest (Or. and Wash.)en
dc.subjectHazardous waste site remediation -- Umatilla National Forest (Or. and Wash.)en
dc.subjectAbandoned mines -- Environmental aspects -- Umatilla National Forest (Or. and Wash.)en
dc.titleAjax/Magnolia projecten
dc.typeOtheren


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