O'Terra Geotech Group
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Our professional team consists of licensed Geotechnical and Civil engineers and Engineering geologists, registered in the State of CA with decades of experience in geotechnical and materials engineering in the San Francisco Bay Area. We specialize in determining and finding a cost-effective way to design and build foundations for residential and multi-story commercial buildings and recommending solutions to resolve foundation distress problems.

We specialize in landslide investigation and recommend cost-effective repair strategies. We also specialize in designing various types of retaining walls (on spread footing or drilled piers), geosynthetic reinforced embankment, below grade structures, and performing slope stability, seismic, and liquefaction analyses.
Services
For the last 15 years, O'Terra Geotech Group, Inc. has been committed to providing our clients with a wide range of geotechnical engineering services. Our professional engineering personnel are highly educated, have extensive experience and skills in the field of geotechnical and materials engineering to meet our clients' need.
Foundation engineering involves the determination of the best suited and most economical foundation types and depth for our clients' projects based on the strength of foundation soils and rocks. We provide geotechnical information, design data, and recommendations for slab-on-grade, mat foundation and drilled piers foundation to the project structure engineer.
At O'Terra Geotech Group, Inc., we can provide you with all your soil engineering needs. Soils and foundation investigation involve soil borings, test pits, CPT sounding, using truck-mounted track-mounted and portable drilling rigs. Standard Penetration Test (SPT) is conducted at 5' or less intervals.
When buildings to be constructed on existing slopes we investigate the condition and stability of the slopes, perform stability analysis using computer program and provide written recommendations. For landslide project, we investigate the site, conduct foundation explorations and provide repair recommendations.
Reviews (4)
Ido Shemesh
Ido Shemesh
Apr 06, 2021
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We scheduled a consultation with a soil engineer, who showed up on time, was pleasant to work with, was knowledgeable and professional and gave us usable and actionable recommendations. We will definitely work with them again.
Gabe Brovedani
Gabe Brovedani
Oct 23, 2019
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Fast response and competitive bid. The work was then done quickly and the final report was thorough. My structural engineer was quite happy. I'll be working with them again.
Shams Mahallati
Shams Mahallati
May 20, 2019
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As a structural engineer working with this firm, I am very satisfied with the geotechnical reports. Accurate and well written.
Beverly Neblett
Beverly Neblett
May 06, 2019
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I was very pleased with the quick response to my request for a soil report.
The site visit and and the report was handled very well.