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• Ione-Carbondale clays, Amador County, Calif.
• Penn Mine slag dump and mine water, Calaveras County, Calif.
• Iron Mountain deposits, San Bernardino County, Calif.
• Investigation of French Hill chromite mine Del Norte County, Calif.
• Shasta and California iron-ore deposits Shasta County, Calif.
• Investigation of the Coggins chromite mine, Siskiyou County, Calif.
• Investigation of Oat Hill mercury mine Napa County, Calif.
• Investigation of the Seiad Creek chromite deposits, Siskiyou County, Calif.
• Investigation of Antimony Peak, Kern County, Calif.
• Investigation of the Hogan tin mine Kern County, Calif.