Combustion Particle Analysis:clear answers after fire-related events
PriorityLab provides laboratory analysis of combustion particles to support wildfire impact assessments, structure fire investigations, and indoor environmental evaluations. Our testing helps identify and quantify combustion-related particles while distinguishing them from normal background debris.
Learn More about Combustion Particle Analysis
When Combustion Testing Is Used
Combustion particle analysis is commonly requested following:
- Wildfire smoke intrusion
- Structure fires or nearby fire events
- Post-remediation verification
- Unusual dust or residue complaints
- Insurance, consulting, or legal documentation needs
PriorityLab’s role is to provide objective laboratory findings, not risk thresholds or exposure limits, so clients can make informed decisions based on reliable data.
Particle Identification Through Optical Microscopy
Optical microscopy is the cornerstone of combustion particle analysis. This method allows for rapid turnaround, cost-effective testing, and detailed evaluation of particle size, shape, and composition. Polarized light microscopy is particularly valuable for differentiating combustion particles from common indoor and outdoor materials.
In addition to combustion indicators, PriorityLab can identify and quantify more than 40 additional particle types when needed.
Sample Types We Accept
PriorityLab works with a variety of sample media, including:
Tape lifts
(preferred for surface particle quantification)Dust and vacuum cassette samples
Wipe samples for supplemental chemical analysis
Bulk debris or scrapings
Air cassette samples
Our team can help determine the most appropriate sampling strategy based on site conditions and project objectives.
Reporting & Interpretation
Laboratory reports clearly document:
- Particle types observed
- Relative or quantitative particle loading
- Comparison to background samples when available
- Method-specific units and limitations
While no regulatory standards currently exist for combustion particle surface loading, PriorityLab’s reporting aligns with current industry guidance, including the AIHA Technical Guide for Wildfire Impact Assessments (2025).
What does combustion particle testing tell me?
Combustion particle analysis identifies whether combustion-related particles are present and documents their type and quantity. It helps distinguish fire-related debris from normal background dust.
Does this testing determine health risk?
No. There are currently no government standards for assessing health risk from surface combustion particles. PriorityLab provides laboratory data to support broader evaluations conducted by consultants or other professionals.
What is the most reliable sampling method?
Tape lift samples are generally the most effective method for quantifying combustion particles on surfaces because they preserve particle morphology and allow for controlled sampling areas.
Are wildfire and structure fires treated differently?
The analytical methods are similar, but interpretation considers the event type, building conditions, and background samples. Wildfires and structure fires can both introduce chemical and physical hazards.
How fast is turnaround time?
Optical microscopy allows for relatively fast turnaround compared to more complex analytical methods. Specific timelines depend on sample volume and project scope.
Can PriorityLab identify other particles besides combustion debris?
Yes. In addition to combustion particles, PriorityLab can identify and quantify dozens of other particle types when requested.