Phase I Environmental Site Assessment (ESA) FAQ

Buying or selling commercial property?

Here's what to know about a Phase I ESA.

What is a Phase I ESA?

A Phase I ESA checks the history of a property to see if there may be environmental problems—like leaks, spills, or past uses that could cause contamination.

Do I need a Phase I ESA?

Yes—if you’re buying or financing commercial property, your lender will likely require it. It also helps protect you from legal and cleanup risks.

Who needs a Phase I ESA?

A Phase I ESA is common for anyone dealing with commercial property:

✔ Buyers need one before closing a deal or getting a loan

✔ Banks and lenders may require it for financing

✔ Attorneys often advise clients to get one for protection

✔ Developers use it to check for problems before building

✔ Sellers sometimes get one to show buyers the property is clean

It helps protect everyone from hidden risks and surprise costs.

What does a Phase I ESA include?

We review old records, past uses, aerial photos, maps, and inspection reports. We also visit the site to look for red flags.

Does a Phase I include testing?

No. A Phase I does not include soil, water, or air testing. If we find signs of possible contamination, we may recommend a Phase II ESA.

What happens if a Phase I finds a problem?

If we find a possible issue (called a "Recognized Environmental Condition" or REC), we’ll explain it clearly and tell you what to do next—usually a Phase II.

How long does a Phase I ESA take?

Most Phase I reports take about 1 to 2 weeks. We work fast to help you keep your deal on track.

How long is a Phase I ESA good for?

A Phase I ESA is valid for 180 days. After that, it may need to be updated for it to stay valid for lender or regulatory use.

What if the property looks clean? Do I still need one?

Absolutely! Even clean-looking sites can have hidden issues from past uses. A Phase I protects you from unknown risks.

Why choose Oak Environmental for my Phase I ESA?

We move fast, keep it simple, and give you clear answers. Our reports are trusted by banks, attorneys, and buyers across NJ.

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At Oak Environmental, we check properties for problems and help clean them up. We make sure everything follows the rules. You’ll get clear answers, fast help, and no surprises.

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127 Vroom St, Trenton, NJ 08610, USA

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