Delivering insight for safe, stable, and buildable sites

WSB provides comprehensive geology and geotechnical engineering services across Los Angeles and throughout California. Our team delivers expert sampling, testing, and consulting for residential, commercial, and infrastructure projects—helping clients make informed decisions from site selection through construction.
From initial site exploration to detailed engineering reports and seismic evaluations, we provide the data and guidance needed to reduce risk, ensure compliance, and support long-term structural performance.

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SERVICES

Our experts specialize in

Engineering Geologic Reports

We develop reports that identify geologic conditions, hazards, and site recommendations to support planning, design, and regulatory review.

Slope & Excavation Stability

We analyze natural and constructed slopes, as well as temporary and permanent excavations, to ensure safe and stable development.

Liquefaction Analysis

We assess the potential for soil instability during seismic events and provide mitigation strategies to reduce risk.

Fault Evaluation

We perform seismic investigations to identify faults, assess activity, and evaluate potential impacts on proposed development.

Percolation & Septic Testing

We conduct percolation testing to support the design and placement of onsite wastewater treatment systems.

Infiltration Testing

We evaluate soil permeability to support stormwater management design and system sizing.

Field Observation & Testing

We provide grading observation, density testing, and construction inspections to support quality control and compliance during construction.

Site Exploration

We evaluate surface and subsurface conditions using drilling, test pits, and mapping to understand site constraints and collect samples for analysis.

Geotechnical Engineering Reports

We provide foundation design recommendations, grading guidance, and construction considerations based on field data and laboratory testing.

Soil & Rock Testing

Our in-house laboratory evaluates physical and chemical properties of soil and rock, following ASTM and applicable industry standards.

Built for confident development

WSB’s integrated services help clients reduce geotechnical risk, support safe design, and keep projects moving forward efficiently—from early site evaluation through construction.

Field crew conducting subsurface investigation with auger drilling equipment to evaluate soil conditions and collect samples for geotechnical analysis.

OUR EXPERTISE

Shaping the future of infrastructure

Our teams of experts work together to seamlessly deliver innovative and ground-breaking service. Learn about each of our groups.

WSB Staff working in the lobby of the WSB headquarters.

Discover Our Difference

We partner with our clients and communities to build what’s next in infrastructure – the places, spaces, and systems that support our lives.