Environmental due diligence that protects your transaction

Phase I Environmental Site Assessments

A Phase I ESA is the foundational step in commercial real estate due diligence. Conducted to the ASTM E1527 standard, it combines a review of historical and regulatory records, a site reconnaissance, and interviews to identify Recognized Environmental Conditions (RECs) — with no sampling involved. A properly executed Phase I helps satisfy the federal All Appropriate Inquiries requirement, preserving the liability protections that buyers and lenders depend on at closing.

We provide Phase I ESAs across the country and are based in Texas — explore our local service areas:

Phase II Investigations

When a Phase I identifies potential contamination, a Phase II Environmental Site Assessment confirms whether it is actually present. This intrusive investigation involves collecting and analyzing soil, groundwater, and soil-vapor samples to characterize the nature and extent of any release. The findings give clients the factual basis they need to negotiate, remediate, or proceed with confidence.

Phase III Support

Phase III addresses confirmed contamination through remediation and corrective action. Oaks Environmental supports clients with remedial planning, cleanup oversight, and the documentation required to demonstrate that a site meets applicable regulatory standards — providing a defensible path to closure that keeps your project moving.

Risk Assessments

Environmental risk assessments quantify the potential human-health and ecological risks posed by site conditions. By evaluating contaminant exposure pathways against regulatory screening levels, we help clients understand whether further action is warranted and support risk-based closure strategies that can save significant time and cost.