It’s been a great experience working with everyone at Cornerstone over the past few years. You guys are top drawer when it comes to quality product, professionalism and customer service. I hope I get the opportunity to work on future projects with Cornerstone.
— Project Manager, David J. Powers & Associates, Inc.
What’s most impressive about Cornerstone Earth Group is their solutions-oriented focus. Many consultants seem to make work for themselves in environmental remediation. Cornerstone is the exact opposite. With their past experience and solid relationships with regulators they seem to get to the finish line with little fanfare and a true endgame for all stakeholders.
— Vice President, Pacific States Environmental Contractors
It’s been a great experience working with everyone at Cornerstone over the past few years. You guys are top drawer when it comes to quality product, professionalism and customer service. I hope I get the opportunity to work on future projects with Cornerstone.
— Project Manager, David J. Powers & Associates, Inc.
What’s most impressive about Cornerstone Earth Group is their solutions-oriented focus. Many consultants seem to make work for themselves in environmental remediation. Cornerstone is the exact opposite. With their past experience and solid relationships with regulators they seem to get to the finish line with little fanfare and a true endgame for all stakeholders.
— Vice President, Pacific States Environmental Contractors

Cornerstone Earth Group will help you achieve your goal, whether it is the redevelopment of a brownfield property, expansion of an existing facility, development of infrastructure, or acquisition of a real estate portfolio. We are recognized as one of the more innovative and successful firms in developing creative approaches to cost-effectively mitigate environmental issues. We achieved this reputation based on our extensive local experience, practical skills in assessing properties, familiarity and long-term successful relationships with local regulatory agencies, and, most importantly, learning about your needs.

Once environmental conditions are understood, we help you compare environmental liabilities with your redevelopment plans, providing you the information needed to make an educated decision about your investment. We help minimize the technical and regulatory complexities through strategic solutions that fuse technical expertise with creativity and practicality. For simple to complex environmental liabilities and risks, rely on Cornerstone Earth Group’s team of professionals to add value to your plans.

Our Environmental Services Include:
  • Phase I Environmental Site Assessments
  • Preliminary Endangerment Assessments
  • Phase II Soil, Soil Vapor and Groundwater Quality Investigations
  • Soil Profiling for Import and/or Export
  • Soil Vapor Intrusion Evaluations
  • Indoor Air Monitoring
  • Vapor Mitigation Design
  • Contaminant Fate and Transport Modeling
  • Aquifer Pump Tests
  • Well Design and Installation
  • Geophysical Surveys
  • Human Health Risk Assessments
  • Remediation Design and Implementation Services
  • Soil Management Plans
  • Dust Monitoring during Construction
  • Drone Services
Cornerstone Earth Group integrates geotechnical engineering, engineering geology, earthquake engineering and construction services to facilitate cost-effective site selection and design of project improvements including foundations, retaining structures, pavements, shoring, site earthwork, site mitigation, and utility installation. Our Principal Engineers’ experience, technical capabilities and construction expertise allow us to develop practical design solutions to meet your project requirements. We tailor our services by listening to you and your design team, and sharing our experience with you. We understand the importance of clear and concise communication and of maintaining a consistent project team during the design and construction phases to keep projects on schedule and on budget. For every dollar you spend on our design services, our goal is to save you ten dollars in construction. You can depend on Cornerstone Earth Group to provide intelligent geotechnical engineering solutions that add value to your project.
Our Geotechnical Services Include:
  • Foundation Investigations
  • Site Selection / Due Diligence Investigations
  • Geologic Hazards Clearance
  • Earthquake Engineering
  • Seismic Evaluations and Site Response Spectra
  • Liquefaction Analysis
  • Slope Stability Seismic Hazard Analysis
  • Pavement Design, Evaluation, and Repair Recommendations
  • Excavation Shoring / Dewatering Consultation
  • Utility Installation / Microtunneling Recommendations
  • Earthwork Recommendations
  • Retaining Wall Recommendations
  • Structural Soil Recommendations
  • Sustainable Design Input
  • Levee Design, Evaluation, Review Services
  • Soil and Rock Mechanics
  • Field and In-situ Testing
  • Drone Services
  • Laboratory Testing Services
    • DSA Approved LEA No. 245
    • AASHTO RE:Source Accredited R18, D3740 (Soil)

Cornerstone Earth Group works closely with you, your design team, and your general contractor to help keep your project on schedule and on budget during construction. From plan reviews to field observation and testing services, our experienced engineers, geologists, construction managers and engineering technicians will provide the oversight needed to deliver value-added services that help meet your construction requirements. In addition, our construction staff works diligently to help obtain the appropriate level of testing and documentation to keep your project in compliance with public agency requirements.

Our Principal Engineers are accustomed to anticipating problems during construction and work proactively to help avoid them. If problems do arise during construction, we develop responsive, practical and cost-effective solutions to keep your project on track. As with any construction project, we understand that occasionally you may have urgent needs and we are accustomed to these demands. Our field staff is in constant communication with our office, and the needs of our clients’ projects are constantly being reviewed and re-scheduled each day, as projects require. For a successful construction project, put Cornerstone Earth Group’s experienced professionals to work for you.

Our Construction Services Include:
  • Foundation Observation
  • Earthwork Observation / Testing
  • Erosion Control Assessment
  • Utility Trench Backfill Testing
  • Pavement Testing
  • Laboratory Testing Services
  • DSA Approved LEA No. 245
  • AASHTO RE:Source Accredited R18, D3740 (Soil)
  • Retaining Wall Backfill Testing
  • Excavation Shoring / Dewatering Consultation
  • Recycled Materials / Sustainable Design Input (LEED)
  • Driven Pile Observation / Analysis
  • Drilled Pier Observation / Analysis
  • Ground Improvement Observation / Analysis
  • Slope / Landslide Mitigation
  • Value Engineering Consultation
  • Soil Stabilization / Chemical Treatment Recommendations
  • Piezometer Installation and Monitoring
  • Inclinometer Installation and Interpretation
  • Floor Level Surveys
COMMERCIAL
INSTITUTIONAL
  • Schools K-12
  • Community Colleges
  • Universities
  • Hospitals
  • Retirement Homes
  • Convalescent Centers
  • Churches
  • Correctional Institutions
MIXED–USE
  • Commercial with Retail
  • Commercial with Residential
  • Residential with Retail
PRIVATE & PUBLIC WORKS
  • Bridges
  • Levees & Waterways
  • Dams & Embankments
  • Parks & Recreation
  • Government Buildings
  • Public Buildings
  • Roads & Highways
  • Airports
  • Utilities, Pipelines & Power
  • Waste & Wastewater
  • Landfills
  • Parking Garages
  • Public Works Services
RESIDENTIAL
  • Single Family
  • Custom Homes
  • Townhomes
  • Apartments
  • Condominiums
INDUSTRIAL
  • Mines, Quarries & Tunnels
  • Oil Refineries & Gas Stations
  • Chemical Plants
  • Manufacturing
  • Energy
Cornerstone Earth Group provides Geotechnical, Environmental and Construction Services to the following markets:

Nothing emphasizes our commitment to client satisfaction and service excellence more than one simple statistic:
90% of our revenue comes from repeat business.

Helpful Links & Resources:

REGULATIONS:
STATE AGENCIES:
WATER QUALITY AGENCIES:
AIR QUALITY AGENCIES:
CITY & COUNTY HEALTH SERVICES AGENCIES:
GRANTS & FUNDING:
HAZARDOUS WASTE INFO:
GEOLOGIC HAZARDS:
ENVIRONMENTAL EQUITY:
Environmental
Once environmental conditions are understood, we help you compare environmental liabilities with your redevelopment plans, providing you the information needed to make an educated decision about your investment. We help minimize the technical and regulatory complexities through strategic solutions that fuse technical expertise with creativity and practicality. For simple to complex environmental liabilities and risks, rely on Cornerstone Earth Group’s team of professionals to add value to your plans.
Our Environmental Services Include:
  • Phase I Environmental Site Assessments
  • Preliminary Endangerment Assessments
  • Phase II Soil, Soil Vapor and Groundwater Quality Investigations
  • Soil Profiling for Import and/or Export
  • Soil Vapor Intrusion Evaluations
  • Indoor Air Monitoring
  • Vapor Mitigation Design
  • Contaminant Fate and Transport Modeling
  • Aquifer Pump Tests
  • Well Design and Installation
  • Geophysical Surveys
  • Human Health Risk Assessments
  • Remediation Design and Implementation Services
  • Soil Management Plans
  • Dust Monitoring during Construction
Geotechnical
Cornerstone Earth Group integrates geotechnical engineering, engineering geology, earthquake engineering and construction services to facilitate cost-effective site selection and design of project improvements including foundations, retaining structures, pavements, shoring, site earthwork, site mitigation, and utility installation. Our Principal Engineers’ experience, technical capabilities and construction expertise allow us to develop practical design solutions to meet your project requirements. We tailor our services by listening to you and your design team, and sharing our experience with you. We understand the importance of clear and concise communication and of maintaining a consistent project team during the design and construction phases to keep projects on schedule and on budget. For every dollar you spend on our design services, our goal is to save you ten dollars in construction. You can depend on Cornerstone Earth Group to provide intelligent geotechnical engineering solutions that add value to your project.
Our Geotechnical Services Include:
  • Foundation Investigations
  • Site Selection / Due Diligence Investigations
  • Geologic Hazards Clearance
  • Earthquake Engineering
  • Seismic Evaluations and Site Response Spectra
  • Liquefaction Analysis
  • Slope Stability Seismic Hazard Analysis
  • Pavement Design, Evaluation, and Repair Recommendations
  • Excavation Shoring / Dewatering Consultation
  • Utility Installation / Microtunneling Recommendations
  • Earthwork Recommendations
  • Retaining Wall Recommendations
  • Structural Soil Recommendations
  • Sustainable Design Input
  • Levee Design, Evaluation, Review Services
  • Soil and Rock Mechanics
  • Field and In-situ Testing
  • Laboratory Testing Services
    • DSA Approved LEA No. 245
    • AASHTO RE:Source Accredited R18, D3740 (Soil)
Construction
Cornerstone Earth Group works closely with you, your design team, and your general contractor to help keep your project on schedule and on budget during construction. From plan reviews to field observation and testing services, our experienced engineers, geologists, construction managers and engineering technicians will provide the oversight needed to deliver value-added services that help meet your construction requirements. In addition, our construction staff works diligently to help obtain the appropriate level of testing and documentation to keep your project in compliance with public agency requirements. Our Principal Engineers are accustomed to anticipating problems during construction and work proactively to help avoid them. If problems do arise during construction, we develop responsive, practical and cost-effective solutions to keep your project on track. As with any construction project, we understand that occasionally you may have urgent needs and we are accustomed to these demands. Our field staff is in constant communication with our office, and the needs of our clients’ projects are constantly being reviewed and re-scheduled each day, as projects require. For a successful construction project, put Cornerstone Earth Group’s experienced professionals to work for you.
Our Construction Services Include:
  • Foundation Observation
  • Earthwork Observation / Testing
  • Erosion Control Assessment
  • Utility Trench Backfill Testing
  • Pavement Testing
  • Laboratory Testing Services
  • DSA Approved LEA No. 245
  • AASHTO RE:Source Accredited R18, D3740 (Soil)
  • Retaining Wall Backfill Testing
  • Excavation Shoring / Dewatering Consultation
  • Recycled Materials / Sustainable Design Input (LEED)
  • Driven Pile Observation / Analysis
  • Drilled Pier Observation / Analysis
  • Ground Improvement Observation / Analysis
  • Slope / Landslide Mitigation
  • Value Engineering Consultation
  • Soil Stabilization / Chemical Treatment Recommendations
  • Piezometer Installation and Monitoring
  • Inclinometer Installation and Interpretation
  • Floor Level Surveys
Markets
Cornerstone Earth Group provides Geotechnical, Environmental and Construction Services to the following markets:
COMMERCIAL
  • Office Buildings
  • Warehouses
  • Retail Stores
  • Malls & Shopping Centers
  • Hotels, Motels & Resorts
  • Restaurants
  • Biotech
  • High Tech
  • Research & Development
INSTITUTIONAL
  • Schools K-12
  • Community Colleges
  • Universities
  • Hospitals
  • Retirement Homes
  • Convalescent Centers
  • Churches
  • Correctional Institutions
MIXED–USE
  • Commercial with Retail
  • Commercial with Residential
  • Residential with Retail
PRIVATE & PUBLIC WORKS
  • Bridges
  • Levees & Waterways
  • Dams & Embankments
  • Parks & Recreation
  • Government Buildings
  • Public Buildings
  • Roads & Highways
  • Airports
  • Utilities, Pipelines & Power
  • Waste & Wastewater
  • Landfills
  • Parking Garages
RESIDENTIAL
  • Single Family
  • Custom Homes
  • Townhomes
  • Apartments
  • Condominiums
INDUSTRIAL
  • Mines, Quarries & Tunnels
  • Oil Refineries & Gas Stations
  • Chemical Plants
  • Manufacturing
  • Energy
Nothing emphasizes our commitment to client satisfaction and service excellence more than one simple statistic: 90% of our revenue comes from repeat business.
Resources
Cornerstone Earth Group provides Geotechnical, Environmental and Construction Services to the following markets:
COMMERCIAL
  • Office Buildings
  • Warehouses
  • Retail Stores
  • Malls & Shopping Centers
  • Hotels, Motels & Resorts
  • Restaurants
  • Biotech
  • High Tech
  • Research & Development
INSTITUTIONAL
  • Schools K-12
  • Community Colleges
  • Universities
  • Hospitals
  • Retirement Homes
  • Convalescent Centers
  • Churches
  • Correctional Institutions
MIXED–USE
  • Commercial with Retail
  • Commercial with Residential
  • Residential with Retail
PRIVATE & PUBLIC WORKS
  • Bridges
  • Levees & Waterways
  • Dams & Embankments
  • Parks & Recreation
  • Government Buildings
  • Public Buildings
  • Roads & Highways
  • Airports
  • Utilities, Pipelines & Power
  • Waste & Wastewater
  • Landfills
  • Parking Garages
RESIDENTIAL
  • Single Family
  • Custom Homes
  • Townhomes
  • Apartments
  • Condominiums
INDUSTRIAL
  • Mines, Quarries & Tunnels
  • Oil Refineries & Gas Stations
  • Chemical Plants
  • Manufacturing
  • Energy
Nothing emphasizes our commitment to client satisfaction and service excellence more than one simple statistic: 90% of our revenue comes from repeat business.