Engineering Geology and Geotechnical Services

Questa performs a variety of engineering geological and geotechnical services, frequently related to property development, property transactions, and property rehabilitation. California is an extremely active geological environment, susceptible to earthquakes, floods, landslides, volcanism, adverse soil and bedrock conditions, and seismic sea waves. Questa's team of Geo-professionals understands these hazards and the sites that are prone to them. Trained and educated in Northern and Central California, our team has a strong background in hazard investigation and design measures to reduce the susceptibility of engineered structures to failure. Our experienced staff has provided professional services in the following areas:

• Real estate transaction assessment

• Geological and geotechnical feasibility studies

• Geologic hazards assessment

• Slope and stream bank stability investigation, evaluation, and analysis

• Active fault studies

• Liquefaction studies

• Seismic stability investigation

• Consolidation and settlement studies

• Geotechnical investigations and design recommendations

• Foundation investigations and design recommendations

• Subsurface investigations

• Retaining structure investigation and design

• Failure analysis and investigation

• Flexible pavement design

• Subsurface drainage gallery design

• Roadway stabilization design

• Construction quality assurance

• Grading control testing

• Geotechnical services during construction

Soil Science

• Soil and land classification and mapping

• Soil chemistry, fertility, and plant nutrition evaluation, including laboratory analysis and management recommendations

• Mined land reclamation

• Erosion control planning

Geologic Planning Services

• Initial studies

• Mitigated negative declaration

• Geologic feasibility studies

• Environmental Impact Reports

• Mitigation and monitoring plans

Hazardous Materials Investigation, Remediation, and Management

• Waste containment facilities

• Site stabilization and runoff control

• Pollutant migration investigations

• Aquifer protection and mitigation measures

• Waste treatment technology

• Monitoring programs

• Site closures

• Phase I environmental site assessments

• Phase II site investigations

• Preliminary endangerment assessments

• Remedial design plans

• Site remediation construction and management

Groundwater Quality and Hydrology

• Salinity management

• Nitrate assessment

• Leaching and movement of toxic chemicals

• Groundwater monitoring networks

• Test drilling and well design

• Well drawdown and hydraulics analysis

• Groundwater recharge operations

Laboratory Soils Testing

• Compaction characteristics

• Atterberg limits

• Particle size analysis by hydrometer and sieve analysis

• Torvane shear strength

• Uniaxial compressive strength

For more information or to set up a consultation, please contact Will Hopkins or Jeff Peters at
(510) 236-6114, ext. 222 or 206, respectively.