Why a Property’s Past Still Matters
When it comes to environmental risk, a property’s history can tell you a lot more than its current appearance ever will.
A site may look clean and fully functional today, but past uses can leave behind environmental concerns that are not immediately visible. Former industrial operations, dry cleaners, gas stations, agricultural uses, and other commercial activities can result in contamination that remains in the soil or groundwater long after those businesses are gone.
For lenders, investors, developers, and property owners, understanding how a site was used in the past is a key part of environmental due diligence. Identifying these issues early can help avoid unexpected cleanup costs, regulatory complications, transaction delays, and liability concerns later on.
Why Historical Use Matters
Environmental contamination does not always come from what is happening on a property today. A lot of the time, the real concern comes from something that happened years, or even decades, ago.
Before environmental regulations became what they are today, chemicals, petroleum products, solvents, and waste materials were not always handled with the same level of oversight. Because of that, older properties can carry environmental risk that was never fully investigated or addressed.
Some historical uses that commonly raise environmental concern include:
· Manufacturing or industrial operations
· Automotive repair facilities or fueling stations
· Dry cleaners that used chlorinated solvents
· Agricultural properties where pesticides or fertilizers were applied
· Warehouses with chemical or bulk material storage
· Former landfills, dumping areas, or fill sites
Even if those operations ended long ago, the environmental impact can still affect a transaction today.
Common Environmental Risks Linked to Former Uses
Petroleum impacts
Former gas stations, truck yards, and maintenance facilities may have had underground storage tanks or fueling systems that leaked over time. Those releases can affect both soil and groundwater.
Chlorinated solvents
Dry cleaners and some industrial users historically relied on chemicals like perchloroethylene, or PCE. These compounds can migrate through soil and groundwater and, in some cases, affect neighboring properties as well.
Agricultural residues
Former farmland can present concerns related to pesticides, herbicides, and fertilizer-related compounds. This becomes especially important when agricultural land is being redeveloped for residential, mixed-use, or commercial purposes.
Metals and industrial waste
Older manufacturing and industrial sites may leave behind heavy metals, chemical waste, or impacted fill materials that remain in place long after operations have ceased.
How Environmental Due Diligence Helps Identify Historical Risk
One of the most important parts of environmental due diligence is understanding what happened at a property before the current owner ever took control of it.
Environmental professionals typically evaluate site history using a combination of:
· Historical aerial photographs
· Sanborn fire insurance maps
· Regulatory database reports
· City directories and land records
· Interviews, site reconnaissance, and local research
This historical review helps identify potential Recognized Environmental Conditions (RECs) and other concerns that may warrant additional review or testing.
This is also why assessments like a Phase I Environmental Site Assessment (ASTM E1527-21) or an Environmental Transaction Screen (ASTM E1528-22) are so valuable. They provide a structured way to evaluate risk based on both current site conditions and historical property use.
Why It Is Better to Find These Issues Early
Environmental issues are always easier to manage when they are identified early in the transaction process.
If concerns tied to historical use are discovered late, they can:
· Delay closing or financing
· Increase redevelopment costs
· Require additional investigation, such as a Phase II ESA
· Affect site design, excavation plans, or soil handling during construction
· Create liability concerns for purchasers, lenders, and developers
Early review gives the project team time to understand the risk, price it appropriately, and plan the next steps before it becomes a much bigger issue.
The Real Value of Environmental Due Diligence
Environmental due diligence is not just about checking a box for a transaction. It is about understanding the risk profile of a property before major decisions are made.
A solid environmental review can help:
· Identify potential issues before they become surprises
· Reduce risk for buyers, lenders, and investors
· Support smarter redevelopment planning
· Clarify whether additional investigation may be needed
· Provide a clearer picture of possible regulatory or remediation exposure
At the end of the day, a property’s past can have a direct impact on its present value, redevelopment potential, and overall deal risk. Taking the time to understand that history is one of the best ways to make more informed real estate decisions.
A property’s current condition only tells part of the story. Its historical use often tells the rest. And in environmental due diligence, that history can make all the difference.
Frequently Asked Questions
How does historical property use affect environmental risk?
Past property uses can leave contaminants in soil or groundwater long after the original business or operation has ended. That means a property may still carry environmental risk even if it looks fine today.
What types of properties tend to have higher environmental risk?
Properties with historical industrial, manufacturing, automotive, dry cleaning, agricultural, or fuel-related uses generally carry a higher likelihood of environmental concern because of the materials and chemicals commonly associated with those operations.
How do environmental professionals determine prior site use?
Consultants typically review historical aerials, Sanborn maps, regulatory databases, city directories, land records, and other available sources to build a picture of how the property was used over time.
When should an environmental assessment be completed?
Ideally, environmental due diligence should happen early in the acquisition, financing, or redevelopment process. The earlier risk is identified, the easier it is to evaluate and manage.