West Tracy Fault Geophysical Investigation


SCH Number
Public Agency
California Department of Water Resources (DWR)
Document Title
West Tracy Fault Geophysical Investigation
Document Type
NOE - Notice of Exemption
Document Description
The California Department of Water Resources (DWR), Division of Engineering (DOE), Project Geology Section, proposes to conduct Seismic Reflection Data Acquisition work along a transect perpendicular to the West Tracy Fault. A specialized vehicle called a “vibroseis”, will lower a metal plate and hydraulically vibrate the plate to send sound waves into the subsurface. The reflected sound will be recorded by microphones and transmitted to a field trailer. The vibroseis will move to several pre-determined locations and deploy the metal plate to provide a 3-D model of the subsurface.

Contact Information

Don Hoirup
Agency Name
Project Manager
Contact Types
Lead/Public Agency


Contra Costa
Cross Streets
Byron Highway

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Information Collection Class 6, Section 15306, 14CCR
Reasons for Exemption
Class 6 Categorical Exemptions per CEQA Guidelines Section 15306: Information Collection exempts actions that will be used for data collection and resource evaluation. DWR has evaluated the project for potential to impact sensitive biological and cultural resources. DWR has determined that the project does not have the potential for significant impacts.
County Clerk
Contra Costa


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