Class 1* Permit Modification for Closure of Waste Vault 45 and Tank 101 at Western Digital Technologies, Inc. (formerly HGST, Inc)
12 Documents in Project
Summary
SCH Number
2004072110
Lead Agency
California Department of Toxic Substances Control
(DTSC)
Document Title
Class 1* Permit Modification for Closure of Waste Vault 45 and Tank 101 at Western Digital Technologies, Inc. (formerly HGST, Inc)
Document Type
NOD - Notice of Determination
Received
Posted
9/1/2022
Document Description
The California Department of Toxic Substances Control (DTSC) approved an Addendum to the previously certified Environmental Impact Report and approved a Class 1* Permit Modification to Western Digital Technologies Inc. (WDT) Hazardous Waste Facility Permit. The purpose of the permit modification is to amend the sampling plan and closure timing specified in the approved closure plan for Waste Vault 45 and Tank 101.
The WDT facility, formerly known as HGST, Inc., is used for designing, developing and manufacturing computer storage devices. The processes utilized in these operations include photolithography, vacuum deposition, electroplating, chemical and vacuum etching, and precision machining. In January 2006, WDT consolidated its operations into the 158-acre central production area of the site (internally referred to as the Core Campus and initiated plans to redevelop the remainder of the previous campus for mixed commercial/residential occupancy (internally referred to as the Redevelopment Area). The environmental impacts of the consolidation and redevelopment were addressed in the Integrated Final Environmental Impact Report (IFEIR) for the Hitachi Campus and Mixed-Use Transit Village Project (State Clearinghouse No. 2004072110). The Waste Vault 45 and Tank 101 will be emptied, cleaned, sampled and physically removed. Additionally, soil and groundwater samples will be taken in several locations under Waste Vault 45. Western Digital, Inc. must submit a certification of closure report in accordance with CCR, title 22, section 66264.115.
Contact Information
Name
Nadine Doughman
Agency Name
Department of Toxic Substances Control
Job Title
Hazardous Substances Engineer
Contact Types
Lead/Public Agency
Phone
Location
Cities
San Jose
Counties
Santa Clara
Regions
San Francisco Bay Area
Zip
95119
Notice of Determination
Approving Agency
Department of Toxic Substances Control
Approving Agency Role
Lead Agency
Approved On
County Clerk
Santa Clara
Final Environmental Document Available at
Department of Toxic Substances Control
Permitting Division
8800 Cal Center Dr.
Sacramento, CA 95826
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No
Attachments
Notice of Determination
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