When You Need It Most.


High-quality, cost-effective
environmental consulting


Innovative environmental
services and solutions


Meeting our customers’
changing needs

How We Can Help You

For over 25 years, Cox-Colvin & Associates, Inc. has been recognized as a premier environmental consulting firm
serving a broad mix of private and public sector clients throughout the United States.

Data Management

Cox-Colvin is well versed in handling large and complex datasets and has developed numerous GIS/Database management systems that are robust and tailored to meet specific project and client needs.

Our data management and related services include:

  • Data Importation from Legacy Systems
  • Data Normalization and Compilation
  • Physical File Capture and Storage
  • Geographic Information System (GIS) Application Development
  • Secure Internet-Enabled Database Access

Due Diligence and Brownfield Redevelopment

Cox-Colvin offers a wide range of due diligence and brownfield redevelopment services. These services identify and address potential environmental liabilities associated with property transactions and redevelopment.

Our due diligence and brownfield redevelopment services include:

  • Brownfield assessment and remediation
  • Phase I and II environmental site assessments
  • Asbestos and lead-based paint surveys
  • Voluntary cleanup
  • Brownfield grant funding applications and program management
  • Due care and continuing obligations assessment
  • Risk management and potential land use evaluation

Environmental Monitoring

Our professional staff of hydrogeologists, engineers, and environmental scientists conduct environmental monitoring on most, if not all, of our clients‘ projects.

Our environmental monitoring service include:

  • Groundwater and surface water
  • Soil and sediment
  • Indoor air
  • Sub-slab vapor and soil gas
  • Explosive Gas
  • Wastewater
  • Waste (for characterization)
  • Fence line ambient air
  • Statistics

Groundwater Supply, Exploration and Development

Cox-Colvin’s staff of professional hydrogeologists specialize in making hydrogeologic determinations that are necessary for the development, management, and protection of groundwater resources.

Our groundwater supply and related services include:

  • Hydrogeologic site assessment and characterization
  • Groundwater supply availability/feasibility studies
  • Aquifer testing and yield estimate
  • New well siting and well field design
  • Well maintenance and rehabilitation
  • Vertical and radial horizontal collector well design and performance evaluation
  • Source Water Protection
  • Bid specifications and construction oversight


Cox-Colvin has assisted our clients in the completion a wide variety of environmental projects over the years. These projects have been performed under diverse regulatory programs, a wide variety hydrogeologic conditions, and have involved a wide range of contaminant types and environmental media.

Litigation Support

Our experienced team of environmental professionals provides litigation support, expert opinion to clients nationally and have developed a reputation for technical integrity, working well with other consultants, and offering expert opinions based on sound science.

Our litigation support and related services include:

  • Second and Third-party oversight and document review
  • Expert testimony and depositions
  • Migration pathway and receptor analysis
  • Response action review and evaluation
  • Quantification of environmental liabilities
  • GIS/database applications for large, complex data sets
  • Data and document warehousing

News You Can Use


Cox-Colvin’s staff of RCRA and CERCLA professionals develop and implement comprehensive plans and have the knowledge to support navigating the regulations.

Our RCRA and CERCLA and related services include:

  • Closure of abandoned hazardous waste-sites
  • Remediation and Monitoring
  • Site characterization
  • Inspection and audit support
  • Underground Storage Tank Investigation and clean-up
  • Waste Characterization
  • Reporting Requirements

Vapor Intrusion

Cox-Colvin is an industry leader in Vapor Intrusion (VI) investigation and are globally recognized for our expertise in this field. We are versed in conducting VI projects in commercial, industrial, and residential properties, with minimal disruption and timely reporting.

Our vapor intrusion and related services include:

  • Conceptual Site Model Development
  • Vapor Intrusion Assessment
  • Sub-Slab Sampling
  • Soil Gas Sampling
  • Indoor Air Sampling
  • Sewer Gas Investigation
  • Mitigation
  • Source Area Characterization

Helping Everyone Large and Small

Our clients span the spectrum from primary metals, chemical, and consumer products manufacturers; to petroleum refineries, and permitted hazardous waste treatment, storage, and disposal facilities; to real estate developers and property management firms.


Law Firms


Steel Industry


Oil and Gas
(Upstream through


Water Utilities



Metal wire fence with blurred background of chemical storage at the factory warehouse, Industrial workplace photo. Close-up and selective focus at foreground.

Hazardous Waste Industry


Solid Waste Industry


Energy Generation and Transmission

Our Experience At Your Service

As you get to know us, you will be impressed with our experience, recognize and value our credibility and integrity, and appreciate our responsiveness and commitment to you and your projects.

Our Certifications

  • VAP – Voluntary Action Program
  • CHMM – Chemical Hazardous Materials Manager
  • CPG/PG – Certified Professional Geologist / Professional Geologist
  • CSP – Certified Safety Professional
  • AHES – Asbestos Hazard Evaluation Specialist
  • PE – Professional Engineer


  • AVIP
  • AIPG
  • AEHS
  • Avetta
  • ISN Networld
  • Ariba
  • OCTC
  • AWWA
  • NGWA
  • OARP
  • OESI
  • ORWA
  • WMAO

Our Team

Austin Johnson
Staff Scientist

Colton Creal
Senior Scientist

George H. Colvin
Principal Scientist

Trey Gossard
Staff Scientist

How Can We Help?

Ask our Team


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