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Soil Testing and Geotechnical Engineering

Soil sampling and testing is either required or strongly recommended for most new construction projects, as well as additions such as ADUs (Accessory Dwelling Units) , in Northern California.

At Spartan Structural Engineering, we make the process seamless, from permitting and boring to testing and the final report.

SOIL REPORTS ARE OFTEN REQUIRED FOR:

ADUs (Accessory Dwelling Units)

Foundation Repairs & Underpinning

Pools & Accessory Structures

New Construction

Retaining Walls

Septic Systems & Perc Testing

Remodels & Additions

Hillside & Slope Stabilization

Our Soil Boring/Sampling Process

Our standard turnaround time is 2 to 3 weeks with the option to request expedited service, 1 week guaranteed. Our soil-boring and sampling process begins by drilling one, or for larger projects, multiple borings up to 25 feet deep to obtain representative subsurface samples. This field portion typically takes one day.

The collected samples are then delivered to our lab, where we evaluate soil strength, classify soil types, and test characteristics such as moisture content. Using the test results, we prepare a comprehensive geotechnical report summarizing the subsurface conditions and engineering recommendations, which is usually completed within one week of the boring.

A digital copy of the final report is then provided to the client.

Services Include:

Geotechnical Reports (Soil Reports/Soil Testing)

Evaluation of subsurface conditions through field exploration, laboratory testing, and geotechnical analysis

Foundation Engineering

Recommendations for shallow and deep foundations based on subsurface conditions and anticipated structural loads

Slope Stability & Hillside Development

Evaluation of slope conditions and potential instability

Retaining Wall Engineering

Establish earth pressures, foundation criteria, drainage requirements, and stability recommendations

Pavement Design

Evaluation of subgrade conditions and developing pavement recommendations for driveways, parking areas, and access roads

Advantages of Working With Spartan

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1

Prep Work

We take care of all the preparatory work, including acquiring the necessary permits and coordinating with the city or county inspector when required.

2

Turn Around Time

Doing the laboratory work in-house means faster results. Our standard turnaround time is 2 to 3 weeks with the option to request expedited service, 1 week guaranteed.

3

Versatility

With years of experience and the right equipment, our team can bore into difficult access spaces that many firms cannot. If we can reach it on foot, we can take a sample.

Our Geotechnical Testing Experience

At Spartan Structural Engineering, we have experience with geotechnical testing and soil reports across the entire Bay Area. This includes cities such as Aptos, Berkeley, Boulder Creek, Calistoga, Concord, Crockett, Cupertino, Danville, Discovery Bay, Fairfield, Fremont, Lafayette, Los Gatos, Martinez, Menlo Park, Merced, Mill Valley, Mountain View, Oakland, Pacifica, Pinole, Pleasant Hill, Pleasanton, Redwood City, San Carlos, San Francisco, San Jose, Soquel and Woodside. 

Soon, we will perform testing in Clayton, Foster City, Gilroy, Livermore, Monterey, Morgan Hill, Vallejo and Walnut Creek. 

We've conducted soil testing across the Bay Area, including the following counties:​

  • Alameda

  • Contra Costa

  • Marin

  • Merced

  • Napa​

  • San Francisco

  • San Mateo

  • Santa Clara

  • Santa Cruz

  • Solano

Need Soil Sampling & Testing Done in Northern California? Contact Spartan

At Spartan Structural Engineering, we can provide the geotechnical soil information that you need. To get more information on our soil sampling services, contact our team.

Spartan Structural Engineering

Mailing Address

25A Crescent Dr., #164

Pleasant Hill, CA 94523

(925) 577-2237
info@SpartanSE.com

Contact Us

For inquiries or to discuss your upcoming projects, please get in touch with our team.

© 2025 Spartan Structural Engineering. All Rights Reserved.

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