Air Monitoring
How conflicts of interest affect asbestos air monitoring. Incompatibilities, regulations, documented fraud cases, and how to protect yourself.
What an Air Monitoring Firm Does
An air monitoring firm measures airborne asbestos fibre concentrations before, during, and after asbestos removal or disturbance work. Using calibrated pumps and filter cassettes, analysts collect air samples that are then analysed by an accredited laboratory (or on-site by phase contrast microscopy). The most critical function is the final clearance test: the measurement that confirms the air inside a previously contaminated area is safe for reoccupation. This clearance certificate is the legal proof that the building is safe.
The Main Conflict of Interest
When the air monitoring firm has a financial relationship with the removal company, the objectivity of every measurement is compromised. The monitoring firm becomes a rubber stamp rather than an independent safeguard.
- Relaxing measurement criteria to ensure passing results for a partner removal company
- Sampling from non-representative locations (e.g., far from the work zone, near ventilation intakes) to obtain artificially low fibre counts
- Issuing premature clearance certificates so the removal company can finish faster and move to the next job
- Not performing the required number of samples or sampling for insufficient duration
- Falsifying chain-of-custody records or analysis certificates without performing actual measurements
- Allowing the removal company to dictate when and where samples are collected
The Rule
The air monitoring firm must be completely independent of the contractor carrying out the removal works. The monitoring firm must be contracted and paid by the building owner or an independent project manager -- never by the removal company. This separation is regulated in every major jurisdiction.
Incompatibilities with Other Roles
The following table shows which roles are incompatible with the Air Monitoring role on the same project.
| Role | Compatibility |
|---|---|
| Survey | Compatible |
| Laboratory | Incompatible |
| Removal | Incompatible |
| Consulting | Compatible |
| Project Mgmt | Compatible |
| Waste Mgmt | Compatible |
| Training | Compatible |
Regulation by Country
How different jurisdictions regulate air monitoring independence.
| Country | Regulation | Requirement for this role |
|---|---|---|
| France | Code du Travail, NFX 46-020, Arrêté du 19 juin 2024 | Final air clearance must be performed by a COFRAC-accredited body independent of both the removal company and the project manager. Background, perimeter, and restitution measurements all require independence. |
| United Kingdom | HSG248, Control of Asbestos Regulations 2012 | The analyst performing the four-stage clearance procedure must be independent of the licensed contractor. UKAS accreditation required for clearance air testing. |
| Spain | RD 396/2006 | Environmental monitoring by an ENAC-accredited entity, independent of the RERA-registered removal company. |
| United States | EPA NESHAP, OSHA 1926.1101, state regulations | Independent air monitoring required by most state regulations. The monitoring firm must not be employed by or affiliated with the abatement contractor. |
| Netherlands | SMA-rt certification scheme | Certified final inspection bodies must be independent. The Labour Authority audits compliance (see documented cases below). |
Documented Cases of Fraud
Air monitoring fraud is among the most dangerous forms of asbestos-related corruption, because it directly certifies whether occupied spaces are safe.
Barrie Lyons
Manchester, United Kingdom · 2015–2017
An analyst with 29 years of experience falsified a clearance air certificate. Lyons did not perform the required sampling procedures despite signing a certificate indicating he had. The falsified clearance put building occupants at risk of asbestos fibre exposure.
Found guilty under Section 7(a) of the Health and Safety at Work Act 1974. Fined £2,000 plus £3,905.73 in costs.
Certified Environmental Services (CES)
Utica, New York, United States · 2010s
CES conspired with removal companies Aapex Environmental and Paragon Environmental for nearly a decade. As an accredited monitoring laboratory, CES falsified air clearance results, certifying removal projects as complete and safe when asbestos remained in buildings including schools and homes.
Convicted under the Clean Air Act and mail fraud statutes. Multiple defendants received federal prison sentences.
Thorn Environmental
United States · 2010s
Thorn conspired with accredited laboratories to falsify air monitoring results across multiple asbestos removal projects. The scheme involved systematic fabrication of monitoring data.
Nearly $1 million subject to forfeiture for money laundering. Prosecution by the EPA.
Landell Environmental
United States · 2000s
Landell, serving as the project monitor (third-party control), colluded with the removal company. The monitor allowed irregular removal practices, did not perform air monitoring as required, falsified monitoring records, and did not conduct proper final air clearances.
Prosecution by the Department of Justice, Environment and Natural Resources Division (ENRD).
Netherlands Labour Authority Audit
Netherlands · 2025
A systematic audit by the Netherlands Labour Authority found that just over a third of the 18 certified final inspection bodies were not performing their work correctly. These bodies were issuing clearance certificates improperly after asbestos removal. Inspectors found asbestos remains on sites that had been declared safe for reoccupation.
Regulatory enforcement action. The findings prompted a review of the entire SMA-rt certification system for inspection bodies.
Red Flags for Building Owners
- The removal company selects and directly pays the air monitoring firm
- The same company performs both removal and air monitoring on the same project
- The monitoring firm has no current accreditation (UKAS, COFRAC, ENAC, state accreditation)
- Air clearance results arrive before the monitoring analyst has physically attended the site
- The monitoring firm consistently provides clearance on the first attempt for a particular removal contractor -- no project ever fails
- The clearance certificate lacks specific details: sample locations, pump flow rates, sampling duration, laboratory analysis method
- The monitoring firm is reluctant to share raw data or chain-of-custody documentation
How to Protect Yourself
- Contract the air monitoring firm yourself, or through your independent project manager. The monitoring firm must report to you, not to the removal company.
- Verify accreditation directly with the accrediting body. Do not rely on certificates provided by the firm itself.
- Attend the final clearance inspection when possible. Your presence as the building owner adds accountability.
- Request the complete chain of custody for all air samples: who collected them, where, when, how long the pumps ran, which laboratory analysed them.
- If a clearance test fails, do not allow the removal company to pressure the monitoring firm into a quick re-test. Understand why it failed first.
- For large projects, consider engaging two independent monitoring firms and comparing results.