Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
Naturally Occurring Asbestos
The State of California's Involvement
In addition to contributing expertise and perspective to U.S. EPA's work in El Dorado Hills, Cal/EPA has conducted its own work on asbestos in El Dorado and other counties in California.
air monitoring in California
General information on the studies from the California Air Resources Board (CARB)
Starting in 1999, Cal/EPA studied potential asbestos exposures in the Garden Valley area. The Garden Valley study evaluated quarries and unpaved roads as potential airborne asbestos sources. The study concluded that use of asbestos-containing rock to surface unpaved roads is the largest source of airborne asbestos exposures in the area. At the present time, OEHHA and DTSC are completing an assessment of risks from roads in the Garden Valley area surfaced with asbestos-containing rock.
Valley Site Discovery Project
DTSC's Web page on the project
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