"US Army Corps of Engineers Fault Evaluation Study which identifies the Mormon Island Fault through El Dorado County - Geologic and Seismologic Investigations of the Folsom, California Area by Tierra Engineering Consultants, Inc. (1983)."
USGS Open File Report 2006-1362 "Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California"
US EPA Response to the November 2005 National Stone, Sand & Gravel Association Report
“Evaluation of EPA’s Analytical Data from the El Dorado Hills Asbestos Evaluation Project”
EDC Press Release: El Dorado County Reaction to DTSC Study of Serpentine Roads in Garden Valley - April 2005
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