How to hire an asbestos contractor in Missouri

How do I check an asbestos contractor in Missouri?

Use the state’s own list. Missouri DNR publishes a contractor registry that shows each company’s registration number, expiration date, address, phone, owner and status. Look the company up before you read the bid. If it is not on the list, or the status is not Active, stop there.

The registry is a live tool you can use in a minute. The steps are simple:

1. Open the Missouri DNR asbestos contractor list.
2. Type the company name in the search box.
3. Match the registration number on the list to the number on the bid or contract.
4. Check the expiration date. It must be in the future for the whole job.
5. Check that the status reads Active.

DNR says its professional lists are updated daily. The same DNR asbestos page links separate directories for inspectors, supervisors, workers, air sampling professionals, project designers, management planners and training providers. That matters, because a registered company is only one layer. People on the job need their own certification, which the next section covers.

Advanced Environmental Services, Inc. appears on the list under registration 27-06-0640. On the day we checked (October 30, 2026), the listing showed an expiration date of 2027-06-30 and status Active, with the office at 3100 Gravois Avenue, St. Louis, and Dennis Ruckman as the contact. Run the same lookup on every company you consider, including us. Registry data changes, so treat our check as a snapshot and run your own.

What is the difference between company registration and worker certification?

Registration covers the company. Certification covers each person. Missouri DNR requires that, before an individual can take part in an asbestos project, inspection, management plan, project design or air sampling, that individual must receive certification from the department.

Here is how the pieces fit together:

DNR’s fact sheet says abatement contractors may only employ workers trained and then certified by the department to take part in a regulated project. So ask for the names and certification status of the supervisor and crew who will be on your job. A good contractor can answer this quickly.

At AES, Mr. Ruckman is trained and certified as an Asbestos Inspector and Supervisor, and AES says “We are AHERA Certified Building Inspectors.” You can check any named person on the DNR directories.

Do I even need a registered contractor?

Maybe. The answer depends on the building and the amount of material. DNR says its asbestos rules cover commercial structures and some residential ones, and most single-family homes are exempt. When the rules do apply and a project affects 160 square feet, 260 linear feet or 35 cubic feet or more of regulated material, all of it must be removed by a Missouri registered abatement contractor.

Our rules guide goes through the exemptions in detail. Two points help here:

• A single residential building with four or fewer units is excepted, but two or more residential structures in one project are not.
• DNR’s fact sheet still says that for any asbestos project, regulated or not, you should consider trained asbestos professionals who know OSHA standards.

So an exempt house is not a green light to improvise. It means the state may not require a registered company, and you can choose one anyway. Many owners do, because the work releases fibers if it is done badly. If you are tempted to do it yourself, read what the process involves first.

What should I ask before I sign?

Ask for the documents that prove the claims. These eight checks cover most of what goes wrong:

1. Registration. The DNR registry entry matches the company name, shows Active, and does not expire mid-job.
2. Certified crew. Names and certification status for the supervisor and each worker.
3. A survey you can read. An inspection report with lab results that lists each material, quantity and location.
4. A written scope. What will be removed, what will stay, and how the area will be sealed.
5. Notice handling. Who files the DNR or local notification, who pays the fee, and a start date that fits the 10 working day wait.
6. Waste route. The hauler and the landfill that will take the waste.
7. Clearance testing. Who does it, what the pass standard is, and when the plastic comes down.
8. Insurance and references. Proof of coverage, and past clients you can call.

Items 1 to 7 follow from the Missouri and federal rules and the steps in our removal process guide. Item 8 is basic hiring sense. Insurance is not a state registration item, so ask to see the certificate.

On trade associations, advice online often says to look for membership. AES lists membership of the Home Builders Association, the American Subcontractors Association and the Institute of Inspection Cleaning and Restoration. Membership shows involvement, but it is not a government credential. Treat it as extra, not as proof.

How should I compare asbestos bids?

Compare them line by line, on the same scope. Two bids for different amounts of material cannot be compared by total price. This is the most common mistake owners make.

To fix it, get one survey first. Angi advises hiring a third-party inspector to perform an inspection instead of relying on the word of your removal company, and then giving that report to the contractors you interview. The logic holds: every bidder prices the same quantities. You can buy a survey on its own through our asbestos survey service, or from any other certified inspector.

Then lay the bids side by side:

A bid that is much lower than the rest should prompt a question, not excitement. Ask what it leaves out. Our cost guide lists the things that move the price. AES quotes each job and does not publish asbestos prices.

Is a low price a red flag?

Sometimes. A very low bid can mean a smaller scope, no independent clearance, or a crew that cuts corners on containment and waste. It can also mean the company has lower overhead. The only way to know is to ask what is in the price and what is out.

Questions that sort this out quickly:

• Does the price include notice filing and fees?
• Is clearance testing included, and who does it?
• What happens if the crew finds more material than the survey listed?
• How is waste hauled, and can I see the shipment record?

If an answer is vague, ask again in writing. Vague answers on paper are the early sign of a change order later.

What should I ask on the first phone call?

Ask six short questions, and write down the answers. A good contractor answers each one in plain words. Notes from the call also give you something to compare against the written bid.

1. What is your Missouri DNR registration number, and when does it expire?
2. Who will supervise the job, and are they DNR certified?
3. Will the work need a notice, and who files it?
4. Who will take the samples and run the clearance air test?
5. Where will the waste go?
6. Can you visit the site before you quote?

The fifth question matters more than it seems. DNR says waste from regulated projects must be taken to an approved sanitary landfill or transfer station by registered abatement contractors. A contractor who cannot name the landfill may not have a plan. Our asbestos disposal page explains what the waste route involves.

The sixth question tests the quote. A price given without a site visit and a survey is a guess. Be careful with it, even when it is low.

What should the contract say?

The contract should repeat the scope, the schedule, the notice plan and the clearance test in writing. Do not rely on a verbal promise. A short contract with the right lines protects both sides.

Keep a copy of the survey, the notice receipt, the waste shipment record and the clearance letter. DNR sends a notice-of-receipt letter for each notification. File the paper together, because a buyer, a lender or the next contractor may ask for it.

What do union and MBE status mean for a hire?

They describe the company and its workforce. They do not replace a registration or a certification. AES is a minority-owned business, a Minority Business Enterprise (MBE) and a Native American company. AES is also a Union Signatory Contractor affiliated with the Laborers’ International Union of America Local 110 and Local 42, as well as the International Union of Operating Engineers Local 513.

For public and institutional owners, those facts can matter for contracting goals. Our page on the MBE government contractor role explains how, and our MBE contractors guide covers the rules. For a homeowner, the DNR registry check still comes first.

What does AES say about its own record?

AES says it has never had a citation from any government regulatory agency, including the US Environmental Protection Agency (EPA) or the Occupational Safety and Health Administration (OSHA). It also says it has developed a good working relationship with St. Louis City Air Pollution Control, the St. Louis County Department of Health and the Missouri Department of Natural Resources.

Treat any such claim, ours included, as something to check. Ask for the registration number, run the lookup, and call references. The asbestos removal companies page and our about page say more about who we are. Our service areas include St. Louis, St. Louis County, St. Charles, Missouri and Columbia.

Where can I find a lab that will test my samples?

DNR points to the National Voluntary Laboratory Accreditation Program, which provides a directory of accredited laboratories for asbestos analysis. Ask which lab your inspector uses and whether it is on that list. For plain-language definitions, see our glossary pages on asbestos-containing material and friable asbestos.

Next step

Ready to compare? Run the registry lookup, then call AES at (314) 865-2662 or use the quote form at /contact. Our asbestos abatement page lists what we do. We will send a written scope you can set beside any other bid.