Fire Residue Testing
EAA is an industry leader in Wildfire / Structure Fire Residue testing. Wildfire combustion particles are a complex mixture of cellulose vegetation, burned soil, residual salts, crystalline calcium and silica vegetation particles (phytoliths). Structure fires have a different particle distribution, typically with higher ratios of soot particles and other melted plastics, paint and metals. Quantifying airborne and surface fire combustion contamination is a multi-step process requiring optical Microscopy (Polarized Light & Reflected Light). Automatic Scanning Election Microscopy / X-ray analysis can be utilized to differentiate look-alike interference particles from actual combustion residue. Combustion particles can be separated into three basic combustion categories (soot, char, and ash). There are also other indicator particles–as described above–that can assist in the differentiation of wildfire and structure fire residues from other types of combustion sources.
There are currently no standards for combustion residue (CBP) sampling. However, investigators should use the most recent professional guides such as: 2017 AIHA / Synergist magazine article “The ABCs of Wildfire Residue Contamination Testing”; 2018 AIHA “Technical Guide for Wildfire Impact Assessments for the OEHS Professional” and 2010 IESO document entitled “Evaluation of HVAC Interior Surfaces to Determine the Impact from Fire-related Particulate.”
For more information on: EAA's Comprehensive Fire Residue Analysis
Sample Reports (Upon Request)
Airborne - Optical Microscopy Fire Residue Report
Surface - Optical Microscopy Fire Residue Report
Dust Chemistry - pH & Conductivity Report
Dust Chemistry - pH, Conductivity and Maximum Corrosion Potential Report
Dust Chemistry - pH, Conductivity and Cation/Anion SEM Analysis Report
Fire Residue Testing
Airborne Sampling - Air-O-Cell, Allergenco, Burkard, etc.
Surface Sampling -Tape Lifts (recommended), Microvac or Bulk
pH & Conductivity Sampling - Bulk & Microvac (recommended), Wipe.