Phase I Environmental Site Assessment Services in the Rocky Mountain & High Plains Region
Grouse Mountain offers comprehensive Phase I Environmental Site Assessment (ESA) services for commercial properties, vacant lands, and oil & gas assets across Wyoming and the surrounding region. From desktop reviews to site reconnaissance and risk analysis, our team identifies environmental liabilities early so you can manage risk, comply with regulations, and move forward with confidence. When acquiring property, securing financing, or redeveloping a site, unknown environmental conditions can create major liabilities—including soil or groundwater contamination, historical use impacts, or prior industrial operations.
Why Choose Grouse Mountain for Phase I ESA Services?
Regulatory & technical expertise
Experience with ASTM E1527 standards, CERCLA liability protection, and lender‐required due diligence.
Local/regional knowledge
Based in Buffalo, WY, with field teams who know the terrain and regional environmental norms.
Integrated environmental services
Phase I ESAs are backed by our capabilities in wildlife, water, cultural, and remediation, so you don’t manage multiple vendors.
Responsive & cost‑effective
Fast turnaround, tailored scope to your transaction or asset size, transparent pricing.
Full lifecycle support
From Phase I to Phase II if needed, through to remediation strategy and closure.
Phase I Desktop Study & Records Review
- Historical property‐use research, aerial photo review, environmental records database search (federal, state and local)
- Identification of Recognized Environmental Conditions (RECs) and adjacent property risks
- Interviews with site owners, managers and tenants to uncover past operations that may pose liability
Site Reconnaissance & Walk‑Through
- Visual inspection of site features: storage tanks, chemical handling areas, drums, piping, leaks, staining, distressed vegetation
- On‑foot examination of current site conditions and infrastructure to align with desktop findings
Report Preparation & Liability Analysis
- Delivery of a full Phase I ESA report compliant with ASTM E1527/AAA standards detailing findings, RECs, historical usage, and professional opinion
- If the Phase I reveals potential contamination, we are equipped to proceed with a Phase II ESA, including subsurface sampling, soil/groundwater testing, and air/vapor intrusion screening.
