Somebody told you that you need a Phase 1 before this deal closes. Usually it’s the lender. Sometimes it’s the county, or the buyer’s attorney, or a partner who has been through this once before and doesn’t want a surprise turning up after closing.
Here’s what a Phase 1 Environmental Site Assessment actually is, how long it takes, who pays for it, and what happens if it finds something.
And here’s the part most guides on this topic skip entirely. A Phase 1 matters in Southwest Florida for a specific reason, not a theoretical one. This land was doing something before it became a development site, and around here that usually means cattle, citrus, or fuel. The records that tell you which one are public, they’re Florida-specific, and knowing how to pull them is the difference between a report that checks a box for the lender and a report that tells you what you’re actually buying.
A Phase 1 ESA in One Paragraph
A Phase 1 Environmental Site Assessment is a records and observation investigation into a property’s environmental history. It covers a records review, a site inspection, interviews, and a written report identifying any recognized environmental conditions. No soil or groundwater sampling is involved. It’s performed to the ASTM E1527-21 standard.
That last point about sampling is the single most common misunderstanding we run into. Nobody drills anything during a Phase 1. If you’re picturing a rig on the property and lab results, you’re picturing a Phase 2, and you only get there if the Phase 1 gives you a reason to.
The standard breaks the work into four parts, in this order: a historical records review, a site reconnaissance visit, interviews, and the written report. Our guide to what a Phase 1 involves walks through all four, including who does what and the five obligations that belong to you as the buyer rather than to your consultant.
ASTM E1527-21 is the version EPA recognizes as satisfying All Appropriate Inquiries, or AAI, which is the federal due diligence requirement that preserves certain liability protections for a buyer. The older E1527-13 standard was retired in February 2024. If anyone hands you a report written to that one, it’s out of date.
Why the Requirement Exists
Three things put a Phase 1 in front of you: a lender’s loan conditions, a county, state, or program requirement, or your own decision to look before you buy. We’ve broken all three down in when you actually need a Phase 1 ESA.
Underneath all three is the reason the requirement exists at all. Under CERCLA, the federal cleanup law, a property owner can be held responsible for contamination they had nothing to do with. Completing AAI-compliant due diligence before you buy is what preserves the innocent landowner and bona fide prospective purchaser defenses. Skip it, and if something is down there, it becomes yours along with the deed.
The simple truth is that a Phase 1 is not an environmental exercise. It’s a liability exercise, and it only works if it happens before closing.
What’s Actually in the Ground in Southwest Florida
Most guides to this topic explain the ASTM process and stop. That’s fine as far as it goes, but it doesn’t tell you what an environmental professional is actually looking for on a parcel in Charlotte, DeSoto, or Hendry County. Here’s what we look for, and why.
1. Cattle dipping vats
Between 1906 and 1962, roughly 3,400 cattle-dipping vats were built across Florida to kill cattle fever ticks. Each one was a concrete trough filled with an arsenic solution that cattle were driven through. Secondary contaminants at these sites include BHC, DDT, DDE, and toxaphene.
When the program ended, there was no restoration requirement. Most vats were simply abandoned where they sat.
Documented vat counts across Creek’s service counties, per the Florida Department of Health:
| County | Documented vats |
|---|---|
| Hillsborough | 112 |
| Manatee | 52 |
| DeSoto | 46 |
| Sarasota | 30 |
| Lee | 27 |
| Charlotte | 25 |
| Hendry | 20 |
| Collier | 17 |
Now read the state’s own qualifier on that list. These are the vats that have been located, and FDOH says plainly that “there are likely many more that have not been located.”
A parcel with no record is not the same thing as a parcel with no vat. That distinction is the entire argument for doing the historical work properly instead of running a database search and calling it a day.
2. Former agricultural land
Arsenic-based pesticides and organochlorines were used heavily on Florida groves and row crops before 1972, and they persist in topsoil for decades. Florida’s soil cleanup target levels under Chapter 62-777, F.A.C. are 2.1 mg/kg of arsenic for residential use and 12 mg/kg for commercial or industrial use. For DDT the residential number is 2.9 mg/kg.
Those are not high numbers, and residue on former grove and row-crop land routinely lands above them. A great deal of the buildable land in Charlotte, DeSoto, Hendry, and Manatee counties was grove or pasture inside living memory. If the aerials from the 1950s show rows, that’s worth knowing before you’re under contract.
3. Petroleum storage tanks
Old fuel tanks, both commercial and residential, and many of them undocumented. Fish camps, packing houses, equipment yards, and farms all had them. FDEP administers the Petroleum Restoration Program under Chapter 376, Florida Statutes, and known discharges are searchable.
4. Dry cleaner solvent
Perchloroethylene plumes migrate through groundwater, which means a former dry cleaner two parcels away can still be your problem. FDEP tracks these through the Drycleaning Solvent Cleanup Program. On any commercial parcel in an older retail corridor, this is a standard thing to check.
The Florida Records That Answer These Questions
Knowing what to look for is half of it. Knowing where Florida keeps the answers is the other half, and this is the part that’s genuinely local. A national firm running a standard database package is not pulling these.
- FDEP Contamination Locator Map (CLM). Maps cleanup sites geographically and returns a facility ID for anything it finds near the parcel.
- FDEP OCULUS. The department’s document management system. Take the facility ID from the CLM and pull the actual site file: assessment reports, correspondence, monitoring data, the whole record rather than a summary line.
- STCM. The state’s Storage Tank and Petroleum Contamination Monitoring database, which is where registered tanks and reported discharges live.
- Sanborn fire insurance maps. What was standing on the parcel long before anything was digitized. Still one of the most useful documents in the entire review.
- County property appraiser history and historical aerials. County-level records fill in the gaps between the state datasets, and in this part of Florida the aerials often tell the story on their own.
In our experience, the difference between a thin Phase 1 and a useful one is almost always how far somebody was willing to go into these records. Anyone can run a database report. Reading the actual site file takes longer and it’s where the useful findings are.
How Long a Phase 1 Takes, and What It Costs
Turnaround: one to two weeks. From the day it’s ordered, we can be on the site within a week, and have the report to you the week following. That’s the honest number, and it’s the number we work to.
Cost depends on the parcel: acreage, how many parcels are involved, and how complicated the site history turns out to be. It’s a small line item against the size of the transaction it’s protecting, and it’s the least expensive step in the entire due diligence sequence. We break down what actually moves the price separately, and you can always ask us for a number on your specific parcel.
Who pays is normally the buyer, since the buyer is the party whose liability protection depends on it. It can be negotiated into the contract, and sometimes the lender’s requirement settles the question before anyone argues about it.
How long it stays good is the part people miss. A Phase 1 has a shelf life. Certain components have to be updated after 180 days, and the report as a whole is generally considered stale for AAI purposes after one year. Buyers sometimes get a Phase 1, sit on the deal for eighteen months, and find out at closing that they need it refreshed. If your timeline is long, plan for that.
What Happens If the Report Finds Something
First, some vocabulary, because these terms get used loosely and they mean specific things:
- Recognized environmental condition (REC). The presence or likely presence of hazardous
substances or petroleum products on a property, under conditions that indicate an existing release, a past release, or a material threat of a future release.
- Historical REC (HREC). A past release that has been addressed to the satisfaction of the
regulating agency, with no restrictions left in place.
- Controlled REC (CREC). A past release addressed to the agency’s satisfaction, but with
controls still in place: a deed restriction, an engineering control, or a limit on how the property can be used.
- De minimis condition. A condition too minor to present a threat and not something an agency
would take action on. It isn’t a REC.
Here’s the thing to understand about a REC. It doesn’t kill a deal. It changes the next step. Deals close on properties with RECs all the time, sometimes with a price adjustment, sometimes with an escrow, sometimes after further investigation shows the condition is smaller than the record made it look.
Usually that further investigation is a Phase 2 Environmental Site Assessment, which is where sampling actually happens: soil borings, groundwater monitoring, and lab analysis to find out whether something is really there and how far it extends.
Creek doesn’t perform Phase 2 sampling in-house. We’d rather tell you that plainly than take the work and figure it out afterward. What we will do is explain exactly what the finding means, what the realistic range of outcomes looks like, and put you with a firm that does that work. Then we’re still here for the geotechnical, civil, environmental, and septic engineering once the deal closes and the project starts moving.
Phase 1 ESA Resources
The rest of the cluster, in the order most people need it:
The full walkthrough of the four-component process, who does what, and what the standard leaves out.
that make one mandatory, the ones where it’s just a good idea, and why the parcels most likely to be dirty here are the ones least likely to be required to check.
- How Much Does a Phase 1 ESA Cost in Florida? What actually moves the number, and what a quote
should include.
- Your Phase 1 Found a REC. What Happens Next? Reading the finding, and what a Phase 2 does
and doesn’t tell you.
- Phase 1 ESA Checklist: What to Expect and What You’ll Receive. What to have ready, and how
to read the report when it lands.
Working With Creek
Most Phase 1 reports come from a firm you’ll never speak to again. The report shows up, the deal closes, and that’s the end of the relationship.
That’s not how this works when the same firm is doing your geotechnical borings, your civil design, your environmental permitting, and your septic engineering on the same parcel. What the Phase 1 turns up about site history informs the geotechnical work. What the borings find informs the civil design. Nobody has to be brought up to speed twice, and nothing falls between two consultants who have never met.
Creek Engineering has spent more than two decades doing this work across Charlotte, Sarasota, Lee, Collier, DeSoto, Manatee, Hendry, and Hillsborough counties. We do the site visit ourselves, we pull the Florida records ourselves, and we’ll tell you honestly when a finding is serious and when it isn’t.
If you have a closing date and you need a Phase 1 in hand before it, get in touch and we’ll tell you what the scope looks like on your parcel.
Frequently asked questions
How long does a Phase 1 ESA take?
One to two weeks. From the day the assessment is ordered, Creek can be on site within a week and deliver the report the week after. Complex sites with a long history or multiple parcels can take longer, and we’ll tell you that up front rather than at the deadline.
Does a Phase 1 ESA include soil testing?
No. A Phase 1 is entirely records, observation, and interviews. Sampling belongs to a Phase 2 Environmental Site Assessment, which is only performed if the Phase 1 identifies a recognized environmental condition worth investigating further.
Who pays for the Phase 1 ESA, the buyer or the seller?
Normally the buyer, because the buyer is the party whose CERCLA liability protection depends on completing the due diligence before purchase. It can be negotiated into the contract, and a lender’s requirement often settles the question first.
How long is a Phase 1 ESA valid?
Certain components have to be updated after 180 days, and the report is generally considered stale for All Appropriate Inquiries purposes after one year. A Phase 1 from a deal that stalled will usually need refreshing before it can be relied on again.
