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Pacific Southwest, Region 9: Superfund

Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations

Advanced Micro Devices, Inc. (building 915)

EPA #: CAT080034234

State: California(CA)

County: Santa Clara

City: Sunnyvale

Congressional District: 14

Other Names: AMD 915 Deguine

Bulletin Board

The vapor intrusion evaluation conducted by AMD at its former “Main Facility” building has been completed, showing no evidence of unacceptable vapor intrusion. EPA’s Fourth Five Year Report was completed in 2014, concluding that the remedy at the site is protective but that long-term issues remain. See below for the latest information and reports.

Description and History

NPL Listing History

NPL Status: Final

Proposed Date: 06/24/88

Final Date: 08/30/90

Deleted Date:

From 1974 to 2014, the 22-acre Advanced Micro Devices, Inc. (AMD) Building 915 Site (the “Site” or “AMD 915 Site”) located at 915 DeGuigne Drive in Sunnyvale, was operated as a semiconductor fabrication, research and development facility. The Site was operated by AMD from 1974 to 2003, and by Spansion from 2003 to 2014. In 2014, Spansion sold the Site to a developer of residential housing. The Site was added to the National Priorities List (NPL) in 1990.

The main Site building, Building 915, was built on former agricultural land in 1973. During semiconductor manufacturing operations, solvents and acids were used. In 1981, AMD detected volatile organic compounds (VOCs) in wells near Building 915. VOCs are compounds used in many applications, such as dry cleaning, paint stripping, metal plating, and machinery degreasing. The primary on-Site source of impacts to groundwater appears to have been a leak from one of three tanks that comprised an acid neutralization system.

The Site is located in close proximity to three other sites undergoing groundwater remediation: the AMD 901/902 Thompson Site, the TRW Microwave site, and the Philips/Signetics site. Another source of regional groundwater contamination originating south of the Site is the former Mohawk facility. A plume of contamination from the Mohawk facility has been mapped beneath the eastern portion of the AMD 915 Site. The closest homes are located 400 feet north of the Site. The Site does not impact municipal drinking water supplies.

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Contaminants and Risks

Contaminated Media
  • Groundwater
  • Soil and Sludges

Groundwater beneath the Site contains various VOCs. However, the soil contaminated with VOCs at the Site has been removed, and institutional controls are in place to ensure that no one can ingest or come in direct contact with contaminated groundwater. A vapor intrusion investigation completed in 2013 showed no evidence of unacceptable vapor intrusion.

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Who is Involved

This site is being addressed through Federal, State, and potentially responsible parties' actions.

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Investigation and Cleanup Activities

Initial Actions

In 1981 and 1982, AMD removed an acid neutralization system (ANS), underground storage tanks, and approximately 5,900 cubic yards of VOC-impacted soil. The excavation was shored with concrete piers and extended to 28 feet below ground surface. After the excavation was completed, the shoring remained in place as a physical containment system for residual VOCs directly beneath the base of the excavation. A network of nine groundwater extraction wells was installed in the 1980s to treat impacted groundwater and prevent VOCs from migrating off-Site. Extracted groundwater from these wells was treated by an air stripper and carbon adsorption to remove VOCs. Groundwater extraction and treatment is ongoing.

Cleanup Ongoing

In 1991, Advanced Micro Devices completed an investigation, under State supervision, to determine the type and extent of contamination at the Site. As the final remedy, EPA chose to continue operation of the existing groundwater extraction and treatment system (GETS). The GETS currently treats groundwater using carbon adsorption, with an air stripper remaining as a backup treatment system.

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Cleanup Results to Date

Construction of all cleanup remedies has been completed. The removal of contaminated soils and tanks, and the continued treatment of impacted groundwater have reduced the potential for exposure to hazardous materials at the AMD 915 Site. Continued operation of the GETS provides hydraulic containment to prevent the migration of VOCs off-Site.


Groundwater beneath the Site is impacted by several off-Site, upgradient sources. Because the GETS does not remediate these upgradient sources, groundwater cleanup goals will likely not be met until the upgradient impacts are remediated by other responsible parties.

The Fourth Five-Year Review was completed in September 2014 and concluded that the remedy at the AMD 915 Site is currently protective of human health and the environment. The institutional controls are preventing exposure to contaminated groundwater, and there are no unacceptable risks from vapor intrusion.

However, in order to be protective in the long term, the following actions need to be taken:
(1) Record a new environmental restrictive covenant for the property that is consistent with current California law;
(2) Establish a broader strategy for groundwater restoration for the site, taking into account the upgradient sites; and
(3) An Explanation of Significant Differences should be issued to set new clean-up goals for the Site chemicals, considering the issuance of new Maximum Contaminant Levels for certain contaminants.

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Potentially Responsible Parties


Potentially responsible parties (PRPs) refers to companies that are potentially responsible for generating, transporting, or disposing of the hazardous waste found at the site.


The PRP for the Site is Advanced Micro Devices, Inc.

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Community Involvement

Public Meetings:

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Public Information Repositories

The public information repositories for the site are at the following locations:

Regional Water Quality Control Board
San Francisco Bay Region
2101 Webster Street, Suite 500
Oakland, CA 94612

The most complete collection of documents is the official EPA site file, maintained at the following location:

Superfund Records Center

Mail Stop SFD-7C

95 Hawthorne Street, Room 403

San Francisco, CA 94105

(415) 820-4700

Enter main lobby of 75 Hawthorne street, go to 4th floor of South Wing Annex.

Additional Links

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Contacts

EPA Site Manager
Melanie Morash
415-972-3050
Morash.Melanie@epamail.epa.gov
US EPA Region 9
Mail Code SFD
75 Hawthorne Street
San Francisco, CA 94105
EPA Community Involvement Coordinator
Alejandro Diaz
415-972-3242
1-800-231-3075
Diaz.Alejandro@epamail.epa.gov
US EPA Region 9
Mail Code SFD
75 Hawthorne Street
San Francisco, CA 94105
EPA Public Information Center
415-947-8701
r9.info@epa.gov
State Contact
Max Shahbazian
510-622-4824
MShahbazian@waterboards.ca.gov
California Regional Water Quality Control Board
1515 Clay Street
Suite 1400
Oakland, CA 94612
PRP Contact
Community Contact
Other Contacts
After Hours (Emergency Response)
US EPA
(800) 424-8802

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