Public Health Assessment for National Semiconductor Corporation, Santa Clara County, California, Region 9. CERCLIS No. CAD041472986

摘要

The National Semiconductor Corporation site, located in Santa Clara, Santa Clara County, California, was placed on the National Priorities List (NPL) by the U.S. Environmental Protection Agency (EPA) on July 21, 1987. Several underground acid waste and solvent sumps and tanks, leaks in chemical piping, and aboveground chemical storage areas apparently leaked volatile organic compounds (VOCs), semi-volatile compounds, and metals into the subsurface soils and groundwater. Some of these underground tanks and some but not all of the surrounding contaminated soil have been excavated and removed from the site. Various organic and inorganic pollutants have been detected in on-site and off-site groundwater at levels of human concern. However the contaminated groundwater is not a source of drinking water.