Geophysical Service throughout
the greater bay area

Serving contractors, developers, property owners, engineers, other land surveyors, local municipalities, and state and federal governments.

For over 70 years, Cinquini & Passarino Inc. has been the go-to company for accurate geophysical service in California and beyond. We provide offshore, nearshore, and inshore hydrographic and geophysical surveying. Using the latest technology and equipment, we can identify subterranean resources without the need for excavation. We can also measure and map out surface and subsurface terrains for personal, industrial, or academic use.

Our geophysical service is non-destructive, making it ideal for use in populated areas or sensitive sites that could be damaged by invasive methods. We can evaluate large areas of the subsurface efficiently. By combining methods and data sets, we can provide a comprehensive examination of an area to create effective solutions. Since it doesn’t require excavation, a geophysical survey is also very cost-effective. There’s no need for guesswork or invasive measures. Using our geophysical surveying, you can save time, money, and hassle.

Some of the common projects we work on include:

  • Reservoir surveys and capacity curves
  • Maintenance dredging and capping
  • Marine construction and engineering surveys
  • Environmental support surveys
  • Cable route landing site surveys
  • Pipeline and outfall surveys

We have a multi-disciplinary team of land surveyors, hydrographers, and cartographers. Our skill level, paired with our state-of-the-art equipment, will ensure that no matter the industry, your project will stay on track. All our field personnel are highly skilled and licensed or certified for the services they perform. We typically work within the greater Bay Area but have performed geophysical surveying across the nation.

Our team provides reliable and precise guidance on municipal, commercial, and residential land. We offer a number of specialized services, including UAS (drone) surveys and mappinglaser scanning, and Project View. Our offices are located in Santa Rosa, Healdsburg, Napa, and Oakland. We specialize in providing accurate client-focused geophysical services at competitive prices. If you’d like to work with us or learn more about our services, contact us today at 707-542-6268 or send us an email at