Phase I ESA Information Hub
Understand the property’s history, the assessment process, and the findings that can affect your next decision. These guides bring 50 connected topics together for buyers, lenders, and property owners.
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Start with the assessment
Phase I Environmental Site Assessment
Start with the property’s environmental story.
Phase II ESA & targeted investigation
Turn an unresolved concern into an answerable question.
Understand findings and property history
Understanding your Phase I findings
REC, HREC, CREC—and what comes next.
Reading a property’s history
One address. Many layers of evidence.
Property uses that deserve a closer look
Look at the operation, the evidence, and the setting.
Vapor, PFAS, and transaction questions
Vapor, PFAS & evolving concerns
Match the concern to the pathway.
A practical guide for buyers, lenders & owners
Make due diligence part of the transaction plan.
Phase I ESA: common questions
Straight answers before you order.
Regional guidance
Phase I ESAs in California
State records, local histories, property-specific judgment.
Phase I ESAs in Nevada
A shared assessment framework. A local records strategy.
Ready to discuss a property?
Bring the address, parcel information, current and former uses, any prior reports, and your decision date. We can discuss a scope that fits the property and transaction.