Phase I Environmental Site Assessments (Phase I ESAs)

Proteus Environmental provides high-quality Phase I ESAs for commercial and industrial properties across the West Coast

What is a Phase I ESA and Why Does it Matter?

A Phase I ESA is the standard due diligence process required for most commercial real estate transactions. Performed to ASTM E1527-21 and EPA All Appropriate Inquiries (AAI) standards, it identifies potential contamination risks (Recognized Environmental Conditions or RECs).

Key benefits:

• Qualifies you for CERCLA Innocent Landowner liability protection

• Required by SBA, banks, CMBS, and most lenders

• Uncovers hidden issues like USTs, hazardous materials, vapor encroachment, or past contamination

• Prevents costly surprises after closing

Our Phase I ESA Services

With 15+ years of environmental management experience, we deliver reliable, lender-accepted reports.

Highlights:

• 10-business-day turnaround (standard); rush options available

• Full scope: records review, site reconnaissance, interviews, adjoining property evaluation

• Expertise in RECs, CERCLA, hazardous waste, stormwater, USTs, and vapor encroachment

• Clear, photo-rich reports with plain-English summaries

• Fixed, competitive pricing—no hidden fees

Partner with us to ensure due diligence in real estate transactions.