Norcal Geophysical Consultants INC


Key Personnel

wblackWilliam Black, Professional Geophysicist (PGp-843),
Bill is NORCALís Principal Geophysicist and the Senior Geophysical Consultant at our parent company Terracon. In this capacity he provides geophysical consulting services both within Terracon as well as for its many clients, nationwide. He is responsible for technical development and oversees/conducts specialized surveys requiring the tailoring of geophysical techniques for very specific objectives and/or unusual or specialized site conditions. Bill has been conducting geophysical surveys throughout the United States and in several foreign countries since 1972. This vast experience has provided him with valuable insight into the use of geophysical methods for a wide variety of applications as well as how the information can best be used by others. Billís education consists of a B.A. degree in Geology and an M.S. degree in Geophysics, both from the University of California, Riverside. In 2002 Mr. Black was appointed to the California State Board for Geologists and Geophysicists by Governor Gray Davis. In 2006 he was re-appointed by Governor Arnold Schwarzenegger and served until June 2009. During his second term Bill also served for two years as Board President.

dkirkerDonald Kirker, Professional Geophysicist (PGp-997),
Don is NORCALís Office Manager. He is responsible for client contact and development, the assignment of staff and equipment for all incoming projects, office financial direction, personnel management, health and safety oversight and corporate (Terracon) relations. He is in charge of accounts receivable and payable, job accounting, insurance matters, legal contracts and other administrative duties. Donís attention to detail and efficiency makes him an effective manager. As a geophysicist, Don has been conducting geophysical surveys throughout the United States and several foreign countries since 1986. This includes a wide variety of surface geophysical methods including seismic refraction, electrical resistivity, magnetics, electromagnetics, and utility locating for landfills, site redevelopments, geotechnical projects, groundwater investigations, and fault studies. He has worked on large multi-task and multi-method investigations, as well as small site-specific surveys in a variety of locales and site conditions. Don has a B.S. degree in Geology, with an emphasis in Geophysics, from San Diego State University.

whenrichWilliam Henrich, Professional Geophysicist (PGp-893),
Bill is manager of the borehole logging and imaging group. Since 1976, he has applied his engineering geology background and extensive experience in both surface and borehole geophysical techniques to develop in-depth interpretations of geophysical data that include insightful aspects of engineering geology and geotechnical principals. He is especially knowledgeable in integrating both surface and borehole methods. His previous experience includes performing Staff and Senior level geophysical surveys for a national geotechnical and environmental consulting firm. Bill has a B.S. degree in Geology and a M.S. degree in Geophysics from Idaho State University. He is also a Certified Engineering Geologist (CEG-1546), Professional Geologist (PG-4464).

dbissiriDavid Bissiri, Professional Geophysicist (PGp-1009),
Dave is a Senior Geophysicist and Project Manager. He has been working as a geophysicist since 1989. He has considerable experience using various surface geophysical methods for detecting and characterizing environmental, engineering, and geologic targets in a variety of site conditions. He is especially knowledgeable in vibration monitoring, 3D ground penetrating radar surveys, and utility and subsurface hazard detection. His duties include performing field investigations, processing the results and report preparation. Dave has a B.S. degree in Applied Geophysics from University of California, Los Angeles (UCLA) and has extensive Health & Safety training.

dhaginDavid Hagin, Professional Geophysicist (PGp-1033),
Dave is a Senior Geophysicist and Project Manager. He has been working in geophysical and geological consulting since 1995, and for NORCAL and our parent company Terracon since 2007. Prior to joining NORCAL he served as chief geophysicist and project manager of an established geophysical firm in northern CA and as a staff geologist for a geotechnical firm in southern CA. He also established his own firm providing math and science tutoring for college students. His vast geophysical experience includes a full range of surface geophysical surveys for large infrastructure projects, water resource investigations, specialized engineering problems, and environmental characterization. These projects required the use of seismic reflection and refraction, electrical resistivity profiling, magnetics, electromagnetics, and ground penetrating radar. His duties also include specialized computer processing, 3D modeling and report preparation. David has a B.S. degree in Geophysics and several years of graduate study in geophysics from University of California, Riverside. Dave is also a Professional Geologist (PG-7896), a Certified Engineering Geologist (CEG-2398) and a Certified Hydrogeologist (CHG-884).

swagnerSage Wagner, Staff Geophysicist,
Prior to joining NORCAL in 2020, Sage applied his technical and project management skills to geophysics, environmental, and GIS projects for Terracon in the Texas/New Mexico region. Since 2015, he has continued to develop and expand his geophysical skills in surface and borehole methods, both locally and internationally. His communication skills, pursuit of efficiency and innovation, and focus on safety have quickly made him an asset to geophysical investigations at NORCAL. Sage holds B.S. and M.S. degrees in Geology from Indiana University of Pennsylvania and East Carolina University, respectively.

grandallGeneva Randall, Professional Geologist (PG-5611),
Geneva is NORCALís Graphics Manager. She prepares graphics for professional reports, marketing materials, and presentations for our professional staff to use at various professional organizations and conferences. Geneva has been our AutoCAD expert since 1998. Prior to joining NORCAL, she worked as a Geologist on environmental, engineering, and geothermal projects. Her background and training provide valuable insight regarding how to best present our geophysical data and findings to best meet our clientís needs. She has a B.S. degree in Geology from Sonoma State University.

tblackTravis Black, Senior Field Technician,
Travis has been providing geophysical technical services since 1995. He has valuable experience in field data acquisition, equipment maintenance, calibration, and repair. He is responsible for preparing and mobilizing geophysical equipment and other ancillary gear prior to field start-up and participates in many surface and borehole geophysical surveys. In addition, Travis has extensive health and safety training and serves as NORCALís Health & Safety Officer. Travis has a B.S. degree from San Francisco State University.

kblomKenneth Blom, President Emeritus
Ken retired in January of 2018, 35-years after founding NORCAL. During that time he developed the company from a sole proprietorship to a nationally recognized, highly regarded geophysical consulting firm. After a career that spanned a total of 50-years in geophysical consulting, Ken is now enjoying his retirement with his wife Carolyn at their homes in Graeagle, California and Princeville, Hawaii.