What Happens During Asbestos Testing?
By Daniel SmokeDirector of Operations
Asbestos testing involves a professional inspection of the property, collection of material samples for laboratory analysis, and a written report documenting what was found and where. The process is non-destructive and typically completed in a single visit, with laboratory results returned within days.
Initial Walkthrough and Visual Inspection
The inspector begins with a thorough walkthrough of the property. This documents all accessible areas and identifies materials that are suspected to contain asbestos based on age, appearance, and location. Materials are recorded by type, condition, and approximate quantity. The inspector notes any materials that are damaged or friable, which may require additional precautions.
Sample Collection
Small samples of suspect materials are collected using proper containment procedures. The inspector wets the area before sampling to suppress fiber release, seals the sample in a labeled container, and patches or seals the disturbance site to prevent further fiber release. The number of samples collected depends on the size of the property, the number of suspect materials identified, and the scope of any planned renovation. Samples are sent to an accredited laboratory for polarized light microscopy (PLM) analysis.
Laboratory Analysis
Samples are analyzed at an accredited laboratory using PLM, which identifies the type and percentage of asbestos fibers present. Standard turnaround is 3–5 business days; rush analysis is available in 24 hours. The laboratory reports the asbestos content as a percentage by area and identifies the type(s) of asbestos present. Materials with greater than 1% asbestos by area are classified as asbestos-containing materials (ACM) under federal regulations.
Written Report and Findings
After laboratory results are received, the inspector prepares a written report documenting all materials sampled, their locations, laboratory results, and recommendations. The report includes photographs of sample locations, a site diagram or sketch, and laboratory chain-of-custody documentation. It also records the inspector's assessment of risk based on material condition and likelihood of disturbance. This report is the official documentation required for regulatory compliance and can be provided to contractors, buyers, or regulators.
Understanding Your Results
If no asbestos-containing materials are found, the report provides written clearance. If ACM is identified, the report will recommend a course of action. This may include leaving material in place with a management plan, encapsulation, or full removal depending on condition and planned activity. Materials that are in good condition and unlikely to be disturbed may be safely managed in place under an ongoing monitoring program.
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