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GEOSCIENCE SERVICES

Our team of engineering geologists, geologists, and hydrogeologists provide services to a mix of private, public, and industry clients. These services include support and assessments for hillside development, rock slope stability, geologic hazards, rock rippability, and land use planning feasibility studies.



Naturally Occurring Asbestos

Asbestos is a naturally occurring substance that is now recognized as a health hazard throughout the United States. We are recognized as a leader in understanding and mitigating naturally occurring asbestos disturbed by earthwork construction. Some of our naturally occurring asbestos projects include:

  • Oak Ridge High School Removal Action Workplan
  • Lake View Elementary School Removal Action Workplan
  • Vista Del Lago Subdivision Asbestos Mitigation
  • Hollow Oak Subdivision Asbestos Mitigation
  • Numerous projects for the El Dorado County Department of Transportation
  • Numerous projects for the El Dorado Irrigation District
  • West Elementary School in Hillsborough
  • Naturally Occurring Asbestos Regulatory and Safety Training for Contractors of numerous subdivision and single parcel projects

Development Planning

Increasingly, new land development requires extensive planning studies. We are known for delivering focused studies on time and on budget.

  • Geologic Mapping
  • Seismic Risk
  • On-site wastewater disposal feasibility
  • Landslide analysis
  • Groundwater resource assessment
  • Naturally occurring chemical hazard assessment

Groundwater Resources

Many projects rely on groundwater for drinking and irrigation. We have assessed groundwater resources for numerous clients.

  • Granite Construction
  • Ervin Ranch Partnership. LLC
  • Individual Property Owners

Aggregate Resources

California's growing economy requires increasing amounts of mineral resources. We have been assisting mining companies to assess aggregate resources for more than 20 years.

  • Tiechert Materials
  • Granite Construction Company
  • Western Aggregates, LLC
  • High Country Aggregates

Mine Hazards

Gold mining in the Sierra Nevada Foothills has left a legacy of physical and chemical hazards on land now poised for development. We have extensive experience in identifying and mitigating these hazards in ways that protect human and environmental health as well as allowing for reasonable development.


Slope Stability

Our skilled rock slope specialty services include:

  • Rock climbing traverses for extreme data acquisition
  • Rock slide investigation
  • Design criteria for rock anchors and soldier pile walls
  • Rockfall evaluation to develop criteria for wire nets
  • Computer analyses of joint and fracture data
  • Laboratory testing of rock shear strength
  • Mosquito Road rockfall and landslide mitigation, Placerville, California
  • Lowden Ranch Fire Debris Flows Assessment in Lewiston, California
  • Fred's Fire Slope Stability Assessments in Kyburz, California
  • Cool Quarry Landslide Repair, Cool, California

Dump Mitigation

California is peppered with old dumps and burn dumps that often become impediments to land development. We have developed strong relationships with regulatory agencies that allows us to assist our clients in finding and implementing reasonable solutions in a cost effective and timely manner for these legacy landfills.

On-site Wastewater Disposal

Rural and semi-rural properties use on-site septic systems to dispose of wastewater. Our on-site wastewater specialists are highly respected throughout Central California for their skills in feasibility studies and system design.

  • Rural subdivisions
  • Churches
  • Schools
  • Veterinary clinics
  • Commercial properties
  • Custom builders

Geohazard Studies for Hospitals, Schools and Firestations

Some facilities are designed to survive severe earthquakes. Our engineering geologists are experienced in assessing realistic potential earthquake hazards to assist structural engineers in designing safe buildings.

  • Marshall Hospital, Placerville
  • Barton Memorial Hospital, South Lake Tahoe
  • El Dorado Union High School District
  • Rescue Union School District
  • Buckeye Union School District
  • Marysville Unified School District