21E and MassDEP release records: what Massachusetts buyers should check before an offer

This is general information, not legal or environmental advice. Ask your attorney whether MassDEP release records, an Activity and Use Limitation, or an LSP review belong in your offer, price, or contingencies before you sign.

Massachusetts buyers can search MassDEP’s Waste Site / Reportable Release tools for oil or hazardous-material releases at or near an address before offering. A routine title search may not surface every release record; Activity and Use Limitations are recorded real-estate instruments and are more likely to appear in property records. If filings or site conditions raise concern, a Licensed Site Professional can interpret cleanup status under M.G.L. c. 21E and the Massachusetts Contingency Plan (310 CMR 40.0000). Fyts helps MA buyers see what the public records show — and what remains unverified.

What “21E” means for a residential buyer

In everyday Massachusetts real-estate talk, “21E” points to M.G.L. c. 21E — the Massachusetts Oil and Hazardous Material Release Prevention and Response Act (often called the state Superfund law) — and the cleanup process MassDEP runs under the Massachusetts Contingency Plan (MCP), 310 CMR 40.0000. Mass.gov’s continuing-education outline RE79R13: 21E for Residential Real Estate frames that statute as covering identification and cleanup of property contaminated by releases of oil and/or hazardous material.

For a house buyer, that usually means: public release filings, cleanup status codes, documents submitted to MassDEP, and — when left in place — land-use restrictions. It does not mean every home automatically needs a full commercial Phase I environmental site assessment. Lenders sometimes ask for environmental work when historic use raises risk; ask your lender and attorney what this deal requires.

Search the Waste Site / Reportable Release lookup

Mass.gov’s Find Out About a Contaminated Property page is the front door. The Waste Site / Reportable Release Lookup (linked from that page and explained in Using the Waste Site/Reportable Release Look Up Tool) lets you search by address or town. Mass.gov states there have been over 40,000 releases of oil or hazardous material reported to MassDEP since the mid-1980s.

Before you bid:

1. Search the street address and nearby streets / the same block.
2. Open each hit’s Release Tracking Number (RTN) — the unique ID MassDEP assigns to a reportable release (region-coded 1- through 4-).
3. Read compliance status, notification date, and linked submittals / documents.
4. Save screenshots or PDFs of the summary page with your offer file.

MassDEP’s Understanding the Waste Site/Release Look Up Search Results PDF defines the fields and status codes you will see. Pair the database with a walk of the lot and listing remarks — the file and the ground can diverge.

Activity and Use Limitations vs. closed sites vs. open cleanups

Status labels are snapshots, not warranties. Using MassDEP’s lookup definitions:

• PSNC (Permanent Solution with No Conditions) — a Permanent Solution Statement was submitted indicating response actions achieved a level of No Significant Risk for current and foreseeable future uses without restricting property use.
• PSC (Permanent Solution with Conditions) — a Permanent Solution Statement was submitted indicating No Significant Risk for current uses, but remaining conditions may limit how the property can be used without more cleanup. Certain PSC closures require a deed notice or restriction called an Activity and Use Limitation (AUL).
• Older “RAO” labels — pre-2014 Response Action Outcome language still appears on some records; MassDEP’s glossary treats those as earlier permanent/temporary solution paperwork.
• Open / in-progress statuses (for example active assessment, remedy operation, or other MCP pathway codes in the glossary) mean work or oversight may still be underway — read the RTN detail page rather than guessing from a listing.

An AUL is a recorded instrument that tells future owners which uses and activities are consistent with maintaining No Significant Risk, which uses are restricted, and what ongoing obligations apply. Treat an AUL as first-screen reading for any deal — ask your attorney how it affects financing, renovations, and resale. MassDEP also publishes an AUL map layer from the contaminated-property hub.

A closed-looking RTN is not the same as “the property is clean.” MassDEP’s glossary notes that some “RTN Closed” entries only mean future work for that release will continue under another primary RTN. Always open the detail page and the underlying statements.

Visual clues vs. database homework

Stains, buried-tank fill, strong petroleum odors, unexplained vent pipes, or a former gas-station / industrial neighbor are reasons to dig harder — they are not a substitute for the MassDEP search. Conversely, a clean-looking yard does not clear the database. Do both.

Heating-oil tank history is a common residential path into 21E filings; see Underground oil tanks in Massachusetts before an offer for tank paperwork (this page does not repeat removal steps). Floodplain fill and former industrial edges show up often in river towns — pair this search with flood zones in Massachusetts and town checklists such as Medford and Quincy. Unpermitted fill or demolition can also hide history — see Unpermitted work in Massachusetts.

When to involve an LSP

Mass.gov’s Hiring a Licensed Site Professional page explains that an LSP is an environmental scientist or engineer licensed by the Board of Registration of Hazardous Waste Site Cleanup Professionals to help parties meet c. 21E and MCP requirements. Opinions under the MCP may be provided only by an LSP.

Ask your attorney whether to engage an LSP (or another qualified environmental professional your lender accepts) when:

• The lookup shows an open or unclear RTN on or adjoining the parcel
• A PSC / AUL appears and you need the restriction interpreted against your planned use
• Historic use (fuel, dry cleaning, industrial abutters) does not match a thin public file
• The seller’s story and the MassDEP documents conflict

Homeowner-oriented cleanup context also appears in Mass.gov’s Site Cleanup for Homeowners guide.

Questions to ask before you offer (copy-paste)

1. Please list every MassDEP Release Tracking Number (RTN) for this parcel and any known abutting releases, with compliance status and links to the Waste Site / Reportable Release summary pages.
2. Has an Activity and Use Limitation (AUL) or other environmental deed restriction been recorded? Please provide the recorded instrument.
3. Was there ever a heating-oil underground storage tank, aboveground tank, or reportable oil release on this property? Provide permits, removal records, and any MassDEP filings.
4. Are any MCP response actions, audits, or fee obligations still open?
5. Ask your attorney whether to keep an environmental / records contingency (and how it interacts with inspection timing) in the Offer to Purchase — see Questions before making an offer and Is an Offer to Purchase binding in Massachusetts?.

FAQ

Is a Phase I ESA required for a 1–4 family home?

Not by a single statewide rule that applies to every 1–4 family purchase. Lenders or particular risk profiles sometimes require environmental due diligence. Ask your lender and attorney what this loan and parcel need — do not assume a residential listing is exempt from review or that a Phase I is always mandatory.

What is an AUL?

An Activity and Use Limitation is a deed notice or restriction used at some sites (especially certain Permanent Solutions with Conditions) to keep allowed uses consistent with No Significant Risk and to spell out prohibited uses and owner obligations. Read the recorded AUL; the lookup status code alone is not enough.

Does a closed RTN mean the property is “clean”?

No. Closure labels and Permanent Solution statements describe regulatory outcomes under the MCP at a point in time. Some “closed” RTN entries only consolidate work under another RTN. Open the detail page, read the Permanent Solution / older RAO documents, and ask an LSP if anything is unclear.

How is this different from a Title 5 septic issue?

Title 5 (310 CMR 15.000) addresses on-site sewage systems at transfer. 21E / the MCP address oil and hazardous-material releases to the environment. A property can have both — or neither. See Title 5 septic before an offer.

Should I walk away if a release appears nearby?

Not automatically. Distance, hydrogeology, status code, chemicals, and your planned use all matter. Pull the RTN detail, ask the seller for known filings, and ask your attorney whether an LSP screen or contingency is warranted before you decide.

How Fyts fits

We are building a Massachusetts catch list so MA buyers can put MassDEP release lookups, AUL checks, and tank history in front of the offer. Nearby: Underground oil tanks · Flood zones · Title 5 septic · Unpermitted work · Questions before an offer · Medford house guide · Quincy house guide.

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