Corporate Profile
Consulting Services
Field Services
Lab Services
References
Key Personnel
Contacts

Preliminary Geotechincal Investigations

Feasibility Studies

Liquefaction Evaluations

Segmental Retaining Walls

Forensic Investigations

Specialized Studies

Other Geotech Consulting

Environmental Consulting

Phase I Environmental Site Assessments

Phase II Environmental Site Assessments

Percolation Tests

Southern California Geotechnical offers a full range of geotechnical & environmental services for our clients.

We have the capabilities to carry your project from the initial geotechnical investigation all the way through the preparation of a final grading report.

The principal engineers have extensive experience in California, Arizona, and Nevada performing geotechnical investigations for owners, developers, architects, engineers, and governmental agencies. This experience has provided us with extensive knowledge of the geotechnical conditions throughout this region, and the engineering solutions and construction techniques that are available to deal with these conditions. In many cases, our recommendations have resulted in significant cost savings to our client, while maintaining or decreasing the client’s level of risk. Our experience also extends to the various regulatory agencies that are responsible for reviewing geotechnical reports during development. We have a clear understanding of the requirements of these agencies. Our reports are structured to address these requirements in the first report; reducing the need for revisions to the design after regulatory review. We have developed professional relationships with many of the individuals at these regulatory agencies, allowing us to expedite the review process.

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Preliminary Geotechnical Investigations
Most projects begin with the performance of a preliminary geotechnical investigation. These investigations are focused on providing detailed grading and foundation design recommendations. We endeavor to provide a highly “buildable” design that will allow the project to proceed in a cost-effective, expeditious manner. We provide preliminary geotechnical investigations for a wide variety of projects, such as:

  • Commercial/Industrial Buildings
  • Distribution Warehouses
  • Retail Shopping Centers
  • Restaurants
  • Single-Family Residences
  • Residential Tracts
  • Roadways
  • Retaining Walls
  • Towers

The results of our preliminary geotechnical investigations are presented in clearly written, well organized reports that provide the geotechnical design parameters in a concise format. The reports provide the detailed technical data required by other design professionals, and are also easily interpreted by construction personnel.

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Feasibility Studies
We typically perform geotechnical feasibility studies for projects which are in a due diligence process, to determine geotechnical conditions which may significantly impact the cost of development. These studies typically include a limited scope of subsurface exploration and laboratory testing. The data which is obtained from the feasibility studies can normally be used in the final geotechnical investigation.

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Liquefaction Evaluations
Liquefaction is a process by which seismic shaking induces excess pore water pressure in loose, poorly-graded sands that are below the water table, causing them to behave as a liquid. The effects of liquefaction can range from surficial sand boils to large ground surface settlements, to lateral spreading of embankments. Each of our comprehensive preliminary geotechnical reports provide a limited discussion of the liquefaction potential of the on-site soils. Where initial research or drilling indicates a significant potential for liquefiable soils, we can perform a more detailed liquefaction evaluation. This evaluation will determine the extent of the liquefiable materials, estimate the magnitude of total and differential settlements which could occur, and recommend measures to mitigate these settlements. We have performed liquefaction analyses for a number of sites throughout California. These evaluations are performed in accordance with California Division of Mines and Geology Special Publication No. 117, Guidelines for Evaluating and Mitigating Seismic Hazards in California.

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Segmental Retaining Walls
SCG also specializes in providing designs for segmental retaining walls. These walls are constructed of individual, dry-stacked masonry units, typically incorporating geogrid reinforcement. These walls are typically much more cost effective to construct than conventional reinforced concrete walls, and are also more aesthetically pleasing. We have developed a proprietary computer program to analyze and design these walls in accordance with the National Concrete Masonry Association guidelines.

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Forensic Investigations
The SCG staff has extensive experience in performing forensic engineering services at sites where building, pavement, retaining wall or other structural distress has occurred. These investigations require detailed knowledge of construction techniques, in addition to a clear understanding of the interaction between soils and structures in order to postulate the cause of the observed distress. Our principal engineers have participated in numerous forensic investigations for residential, commercial and public works facilities. This experience allows us to accurately determine the probable sources of the distress, and provide concise recommendations that can reasonably be implemented at the site.

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Specialized Studies
Our geotechnical services can be employed to prepare specialized geotechnical reports addressing the unique features of your site, such as:

  • Pavement Design
  • Slope Stability Studies
  • Groundwater Studies
  • Geologic Mapping
  • Geologic Hazards Surveys
  • Landslide investigations
  • Percolation Testing
  • Soil Resistivity

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Other Geotechnical Consulting Services
As registered geotechnical engineers with extensive local experience, SCG can also provide geotechnical consulting services for due diligence reviews, third party reviews, and project quality assurance.

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Environmental Consulting Services
Southern California Geotechnical further serves our clients’ needs with a complete array of environmental consulting services. Our primary focus in providing these services is to identify risks which may impact the acquisition or development of a site. We manage environmental projects with emphasis on achieving rapid, cost-effective completion of the project, while complying with the applicable regulatory requirements.

Significant cost savings can frequently be achieved by addressing the environmental concerns of the project during performance of the geotechnical study. If the initial environmental research indicates that subsurface exploration is required, these borings can usually be combined with the geotechnical study, thereby reducing the number of borings and the delays and costs associated with a second mobilization to the site.

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Phase I Environmental Site Assessments
Phase I Environmental Site Assessments (ESAs) are used to identify environmental concerns, or potential environmental concerns, that could create liability for a property owner, seller, or lender. All of our Phase I ESAs are completed in accordance with ASTM standards. We can also modify our format to conform to the requirements of individual lenders or owners. Our Phase I ESA is an important part of satisfying the due diligence requirement of the Superfund Act.

If desired, the SCG Phase I ESA can include a limited asbestos identification survey, a lead paint survey, radon survey, or other specific requirements.

If the Phase I ESA indicates that a potential environmental condition exists at the site or on a nearby property, we have the capabilities to perform Phase II sampling activities, including soil and groundwater sampling.

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Phase II Environmental Site Assessments
Our environmental staff can design a program of subsurface exploration to evaluate the lateral and vertical extent of impacted soils and/or groundwater at sites where environmental conditions are known or believed to exist. Our professional services include the development and implementation of a site specific sampling and analysis program to characterize site conditions at proposed developments, Underground Storage Tank (UST) facilities, existing developments, and other sites where Phase I ESA research indicates that potential environmental conditions are present. We have the flexibility to utilize state of the art sampling technologies, including hollow stem auger borings, air rotary borings, Geoprobeâ or Hydropunchâ borings, groundwater monitoring wells, and other available methods.

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Percolation Tests
SCG also specializes in conducting percolation testing. Percolation testing produces percolation data which determines percolation rates, and is used to prepare a preliminary design for a storm water retention/disposal system that will be used to dispose of surface water runoff at a subject site. Percolation testing consists of surface reconnaissance, subsurface exploration, field testing, and engineering analysis to determine the percolation rate of the onsite soils.