
✔ New Jersey commercial due diligence
✔ Most reports delivered in 2–3 weeks
✔ Plain-English reporting
✔ ASTM E1527-21 compliant
The report typically includes:
Site inspection
Historical research
Regulatory database review
Available records review
Identification of Recognized Environmental Conditions (RECs)
A final written report
This work is:
Built for New Jersey commercial transactions
Clear and plain-English
ASTM E1527-21 compliant
Federal AAI compliant
Property address
Property type
Timing / due diligence deadline
Any known deal details
commercial buyers
lenders
Attorneys
Developers
Commercial realtors

A Phase I Environmental Site Assessment (ESA) is the foundation of environmental due diligence. Before purchasing, refinancing, or redeveloping a property, a Phase I ESA provides a comprehensive review of historical and current property conditions to determine if environmental risks exist.
It is often required by lenders, attorneys, and developers and is the industry standard for identifying environmental liability before a transaction moves forward.
At Oak Environmental, we follow the ASTM E1527-21 standard—ensuring every report is defensible, lender-ready, and compliant with both federal law and New Jersey Department of Environmental Protection (NJDEP) requirements.
Identifies Risks Early: Detects Recognized Environmental Conditions (RECs) before they become costly surprises.
Protects from Liability: Offers protection under the federal CERCLA Superfund law by proving due diligence.
Supports Smarter Deals: Provides leverage in negotiations and strengthens lender confidence.
Speeds Up Transactions: A well-prepared ESA prevents delays and protects closing timelines.

Our Phase I ESAs are structured, thorough, and fully compliant. The process includes:


The ASTM E1527-21 standard sets the legal and technical requirements for Phase I ESAs.
Key updates include:
Refined definitions of RECs and Controlled RECs.
Clarification on historic RECs.
Expanded guidance for title and environmental lien searches.
Non-compliance risk: A report that does not follow ASTM standards may be rejected by lenders or fail to provide liability protection. Oak ensures your ESA is always up to standard.
Buying or selling commercial property.
Refinancing or securing a commercial loan.
Corporate mergers & acquisitions.
Redevelopment, brownfield projects, or change of use.
If a property transaction is on the horizon, a Phase I ESA is the first step to protect your investment.

Avoid unexpected cleanup liability.
Strengthen negotiation positions with verified data.
Provide confidence to lenders and investors.
Ensure smoother, faster closings.
Real Example:
A NJ investor discovered underground storage tanks on a commercial lot through a Phase I ESA. By identifying the issue before closing,
they avoided nearly $250,000 in remediation costs.
Identifies potential environmental risks through research and inspection.
Records review, site inspection, and interviews.
No sampling or lab testing
conducted.
Standard first step for property transactions, refinancing, or redevelopment.
Determines if Recognized Environmental Conditions (RECs) exist.
Identifies potential environmental risks through research and inspection.
Involves physical sampling and laboratory analysis.
Includes soil, groundwater, and/or vapor sampling if risks are suspected.
Recommended if a Phase I ESA finds possible contamination or underground storage tanks.
Quantifies contamination levels and defines remediation needs.
When a Phase II Is Needed:
If a Phase I identifies an abandoned underground tank or signs of contamination,
a Phase II may be recommended to confirm the extent of risk.
New Jersey has unique requirements that go beyond federal standards:
NJDEP Preliminary Assessment (PA): In certain cases, a PA is required in place of—or in addition to—a Phase I.
Alignment with State Law: While a Phase I ESA may satisfy federal CERCLA protections, it may not meet NJDEP’s stricter standards.
We are NJ-based experts. We ensure that your Phase I ESA not only meets ASTM requirements but also aligns with NJDEP regulations, so your report is never questioned by lenders or regulators.
Typical Turnaround: 2–3 weeks. Rush service available.
Cost Factors: Property size, historical use, location, and complexity.
Why Not Cheapest: Low-cost reports often miss details that can derail closings or leave clients exposed to liability. Oak provides thorough, defensible assessments at competitive rates.
Typically valid for one year; some lenders require updates after six months.
Generally not, unless the site has a history of commercial or industrial use.
A Phase II ESA may be recommended to confirm risks.
Yes, but lenders often require an updated report.
A Phase I ESA is more than a box to check—it’s your safeguard against environmental liability and your assurance of a smooth transaction.
Request a consultation or
proposal from Oak Environmental.
Download our free Phase I ESA
Checklist to prepare.
Speak directly with our licensed environmental professionals today.
A Phase I ESA helped keep due diligence moving on a commercial property transaction.
A buyer under contract on a mixed-use property in Newark, New Jersey needed a clear Phase I ESA during due diligence.
Oak Environmental completed the assessment, delivered the report, and helped the client understand the findings in plain English so the deal could keep moving.
NJ-specific due diligence experience
Clear communication
Timing that worked for the transaction
ASTM-compliant reporting
NJ-exclusive environmental firm
Deep NJDEP knowledge
Clear communication
Responsive team
10-Day Turnaround Available for Qualified Properties












A Phase I ESA is an environmental review of a property used during due diligence.
Most reports are delivered in 2–3 weeks, depending on the property.
Yes. Oak Environmental’s Phase I ESA reports follow ASTM E1527-21 and federal AAI requirements.
Yes. Phase I ESAs are for commercial property transactions.
Lenders often require a Phase I ESA during underwriting or before closing on commercial property.
It typically includes a site inspection, records review, historical research, database review, and a final report.
If the report identifies a concern, Oak Environmental can explain what it means and what next steps may be worth considering.
Yes. Oak Environmental works in New Jersey only.
Pricing depends on the property type, size, history, and complexity.
We typically need the property address, timeline, and a few deal details to provide an accurate quote.
Copyright 2025. Oak Environmental Consulting and Services. All Rights Reserved.