CGI offers the following diverse range of services:

Geotechnical Engineering
Engineering Geology
Construction Materials Testing
Special Inspection Services
Pavement Design Services
Seismic Hazard Assessments
Landslide Studies and Stabilization Measures
Geologic Hazards Evaluations
Geophysical Investigations

Geotechnical Engineering
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CGI Technical Services, offers a diverse range of geotechnical engineering services. Our services include the following:

- Shallow and deep foundation systems
- Liquefaction and seismically-induced settlement and mitigation
- Static settlement and mitigation methods
- Thrust resistance and modulus of soil reaction (E’) for pipelines
- Geotechnical trenchless technology design and support services
- Deterministic and probabilistic horizontal strong ground motion
- Seismic response spectra
- Installation and monitoring of instrumentation
- Liner evaluations for landfills, mining activities, etc.
- Roadway and paved surface subgrade and structural section
- Landslide hazards and mitigations
- Soil and rock slope stability
- Rockfall and debris flow mitigation
- Third Party Review Services

Construction Materials Testing
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CGI Technical Services specializes in construction materials testing. We maintain the largest fully accredited geotechnical soils and construction materials laboratory between Sacramento and Eugene Oregon, and our personnel are fully certified and experienced to address all of your construction materials testing needs. We offer the following testing services:

- Soil and aggregate materials
- Masonry block, mortar, grout, brick, and prisms
- Structural and reinforcing steel
- Concrete, gunite, shotcrete, and RCC
- Asphaltic concrete
- Rammed earth and soil-cement
- Materials source development
- Non-destructive testing
- Fireproofing density, thickness, and moisture content
- Building component testing
- Anchor bolt yield strengths and pullout forces

We have extensive experience in the field of construction materials testing both locally and throughout northern California. CGI Technical Services has worked on such notable projects the Turtle Bay Exploration Park and Sundial Bridge

Special Inspection Services
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Quality construction inspection services yield quality constructed products. CGI Technical Services provides a host of special inspection services that can address virtually all of your special inspection needs. The International Code Council of Building Officials (ICCO) certifies our special inspectors in structural masonry, reinforced concrete, post-tensioned concrete, and spray applied fireproofing. Our welding inspectors are ICBO certified in structural steel and welding as well as American Welding Society (AWS) certified as required by the California Building Code (CBC) and Uniform Building Code (UBC). Nondestructive testing of welds and weldments are performed by American Society for Nondestructive Testing (ASNT), standard TC-1A certified level II operators. We offer the following special inspection services:

- Structural steel and welding inspection
- Reinforced and pre-stressed concrete
- Reinforcing steel
- Post-tensioning
- Structural masonry
- Geotechnical soils and grading
- Liner installation
- Rammed earth, soil cement, and chemically-stabilized soils
- Spray-applied fireproofing
- Pile driving
- Drilled piers and caisson
- Gunite and shotcrete

We have extensive experience in the field of special inspection services both locally and throughout northern California. CGI Technical Services has worked on such notable projects the Turtle Bay Exploration Park, Sundial Bridge

Pavement Design Services
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CGI Technical Services professionals are experts in pavement design and construction management. In recent years, we have performed more asphalt mix designs than any other laboratory in California, and we provide all necessary asphaltic concrete tests in our full service, accredited soils and materials laboratory. CGI Technical Services professionals also provide all necessary services for the design and testing for concrete and alternative paving materials. Our services include:

- Asphaltic concrete mix design and testing
- Concrete mix design and testing
- Concrete and asphalt batch plant inspection
- Structural pavement section design
- Geosynthetic paving fabric evaluations
- R-Value and CBR testing
- Deflection and plate loading tests
- Modulus of Subgrade Reaction evaluations
- Forensic studies

CGI Technical Services has provided extensive services to Caltrans and numerous local and regional contractors throughout California. We are routinely consulted when difficult pavement design issues arise and when forensic services are needed to evaluate causes of pavement failure and distress.

Seismic Hazards Assessment
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Professionals at CGI Technical Services have provided seismic hazard assessment services on a wide variety of projects throughout California, southern Oregon, and abroad. Those services include the following:

- Fault location and Alquist Priolo Earthquakes Hazards Act studies
- Paleoseismicity evaluations
- Liquefaction evaluations
- Seismically-induced settlement
- Dynamic slope deformation evaluations
- Deterministic and probabilistic evaluations of strong ground motion
- Seismic response spectra
- UBC/CBC seismic design criteria
- Tsunami and seiche potential
- Critical facility siting evaluations
- Assistance in delineating corridors for linear (roadway, pipeline, etc.) projects

CGI Technical Services professionals have provided these services on scores of projects, including the Oakland to San Francisco Bay Bridge project, the California State Water project, Big League Dreams Sports Complex, the Port Orford Sewer Outfall project, and the City of Eureka’s Martin Slough Interceptor Sewer project.

Geologic Hazard Evaluations
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Geologic hazards can adversely affect almost any development or project unless they are identified and addressed in the planning and design stages. Geologic hazards consist of the following:

·Tsunamis and Seiches/River Bank · Ground Lurching · Flooding · Corrosive & Sulfide-Bearing Soils
· Faults · Landslides ·Liquefaction / Lateral Spreading · Expansive Soils ·Sensitive Clays and Silts ·Seacliff / Shoreline Retreat · Ground Subsidence · Collapsible / Compressible Soils
· Volcanic Hazards · Dam Failure Inundation

Our professionals offer and extensive variety of services and experience in assessing geologic hazards, both at the design stage and for environmental documents (EIRs, EISs, etc.). Those services consist of the assessment of the presence of geologic hazards, as well as, siting assistance for structures, pipelines, roadways, etc., to reduce the impact due to the presence of geologic hazards. This includes, follow-on studies to evaluate methods to reduce or eliminate adverse affects of geologic hazards on proposed and existing structures and improvements.

Geophysical Investigations
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CGI Technical Services does not offer in-house geophysical services but has numerous vendors with which we work that can provide those specialty services when needed. CGI Technical Services’s personnel have worked with a wide variety of geophysical specialists to evaluate numerous subsurface conditions. In association with our subconsultants, we can provide the following services:

- Seismic refraction surveys to image subsurface profiles and to estimate   rippability potential
- Geophysical reflection surveys over land or water to obtain relatively detailed   subsurface geologic profiles
- Electrical resistivity, including pole-dipole and dipole-dipole surveys   (especially useful to evaluate the location of voids, such as lava tubes)
- Electromagnetic methods
- Ground penetrating radar for imaging near surface conditions
- Magnetometer surveys
- Vibration surveys and monitoring
- Downhole caliper logging
- Downhole natural gamma logging
- Downhole resistivity
- Downhole sonic logging
- Acoustic televiewer
- BIPS downhole digital video