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Date: 2015-02-26 12:16:59Geography Geological surveys Geology Reston Virginia Menlo Park California Palo Alto California United States Geological Survey Dumbarton Bridge Arsenic Geography of California San Francisco Bay Area California | Mercury Contamination from Historical Gold Mining in CaliforniaAdd to Reading ListSource URL: online.wr.usgs.govDownload Document from Source WebsiteFile Size: 1,40 MBShare Document on Facebook |