Pacific Northwest Environmental & Geology Consulting
Practical Solutions to
Complex Problems
Stratum Group has provided quality property assessments and solutions for geologic risk, environmental contamination, and natural resource issues for over 25 years.
What We Do
Environmental Services
From Phase I due diligence assessments to full site remediation, our environmental team guides clients through every stage of investigation and cleanup — working closely with state regulators to achieve closure.
- Due Diligence & Phase I ESAs
- Phase II Sampling & Site Characterization
- Remediation & Compliance Monitoring
- NEPA & SEPA Assessments
- Underground Storage Tank Services
- Vapor Intrusion Assessments
What We Do
Geological & Geotechnical Services
Stratum Group is the regional leader in geologic hazard and shoreline geology assessments. Our engineering geologists bring decades of Pacific Northwest expertise to every evaluation.
- Landslide & Slope Stability Assessments
- Coastal & Shoreline Erosion
- Seismic & Liquefaction Hazard
- Channel Migration Assessments
- Geotechnical Engineering Parameters
- Critical Areas Code Review
Why Stratum Group
25 Years of Trusted Expertise
Stratum Group was formed in 1997 to provide high quality, practical, and cost-effective solutions to environmental and geotechnical problems throughout the Pacific Northwest.
Deep Local Knowledge
Decades of work in the Pacific Northwest give us an unmatched understanding of local geology, hydrology, environmental history, and permit requirements.
Personal Service at Any Scale
We've grown significantly over the years, but every project still receives direct, senior-level attention — no matter the size.
Committed to Our Community
Our Public Benefit Program offers discounted services to nonprofits focused on conservation, affordable housing, and community support.
A Record We're Proud Of
Injury and claim free since our founding in 1997. We hold ourselves to the same rigorous standards we bring to every client project.
Who We Serve
Our Clients
We regularly work throughout western Washington and routinely serve clients across central and eastern Washington, Oregon, Idaho, Montana, and Alaska.
Community First
Public Benefit Program
We offer discounted services to nonprofits focused on conservation, affordable housing, and community support — because we believe in giving back to the communities we work in.
Get Started
Ready to discuss your project?
We're ready to start developing a site-specific solution to your environmental or geological challenges today.