Superfund Record of Decision (EPA Region 9): Monolithic Memories (Advanced Micro Devices - Arques) (National Semiconductor), CA. (First remedial action), September 1991

Technical Report · Wed Sep 11 04:00:00 EDT 1991

OSTI ID:7303268

The Monolithic Memories (MM) site is a former semiconductor manufacturing facility located in Sunnyvale and Santa Clara, California. Land surrounding the site is used for commercial and light industrial purposes. The site lies within the confined area of the Santa Clara Valley ground water basin, which consists of various upper and lower aquifer zones. Ground water from the basin provides up to 50 percent of the municipal drinking water for Santa Clara Valley residents. Remediation of the MM site has been combined with another National Priorities List (NPL) site, National Semiconductor (NSC), because both sites contribute to the same ground water contamination problem. The combined remediation has been divided into two Operable Units (OUs). The Record of Decision addresses OU1, which consists of three subunits. The Record of Decision (ROD) addresses remediation of contaminated soil on the facility property and ground water in the upper aquifer zone as OU1. OU2 will address remaining soil and ground water problems associated with the western portion of the ground water contaminant plume. The primary contaminants of concern affecting the soil and ground water are VOCs including benzene, PCE, TCE, toluene, and xylenes; and other organics including PAHs and phenols. The selected remedial action for the site is included.

• Research Organization: Environmental Protection Agency, Washington, DC (United States). Office of Emergency and Remedial Response
• OSTI ID: 7303268
• Report Number(s): PB-92-964503/XAB; EPA/ROD/R--09-91/070
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540250* -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
ALKYLATED AROMATICS
AROMATICS
CALIFORNIA
CHLORINATED ALIPHATIC HYDROCARBONS
CONTAMINATION
DEVELOPED COUNTRIES
GROUND WATER
HALOGENATED ALIPHATIC HYDROCARBONS
HAZARDOUS MATERIALS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
LAND POLLUTION
LAWS
MANAGEMENT
MATERIALS
MONITORING
NORTH AMERICA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
POLLUTION
POLLUTION LAWS
POLYCYCLIC AROMATIC HYDROCARBONS
REMEDIAL ACTION
SITE SURVEYS
SOILS
TOLUENE
US SUPERFUND
USA
WASTE DISPOSAL
WASTE MANAGEMENT
WATER
WATER POLLUTION
XYLENES