AIHA Proficiency Analytical Testing Programs

(A2LA Cert. No. 3300.01) 05/07/2025 Page 2 of 3 PROGRAM NAME FREQUENCY ANALYTES MEASURED Industrial Hygiene Proficiency Analytical Testing1 Four times a year Organic Solvents on Sorbent Tube (mg) Each set includes four coconut charcoal sealed sorbent tubes that contain two or three organic solvents that are rotated each round and include benzene, ethyl acetate, n-butyl acetate, 2-propanol, chloroform, 1,2-dichloroethane, o-xylene, toluene, or trichloroethylene. Five blank sorbents tubes are provided for desorption efficiency studies (a total of five blank tubes). Industrial Hygiene Proficiency Analytical Testing1 Four times a year Silica on Filter (mg) Each set includes four concentration levels of free silica (quartz) on 37-mm, 5.0 µm PVC (polyvinyl chloride) filters. The sample background matrix rotates each round and may be either coal mine dust, talc, calcite, or a combination of talc and coal mine dust. The set also includes a blank 37-mm, 5.0 µm PVC filter. Environmental Lead Proficiency Analytical Testing 2 Four times a year Lead in Paint (%) Each set includes four concentration levels of lead in ground paint chips. Paint chip samples are obtained from lead-based paints from lead sources representative of the compounds and interferences encountered in field samples. Environmental Lead Proficiency Analytical Testing2 Four times a year Lead in Soil (mg/kg) Each set includes four concentration levels of lead in ground and sieved soil. Soil samples are representative of environmental contamination resulting from lead-based paint, the industrial use of disposal of lead-based compounds, or airborne lead emissions. Environmental Lead Proficiency Analytical Testing 2 Four times a year Lead on Dust Wipes (μg) Each set includes four concentration levels of lead on dust wipes. One blank is provided. Dust wipe samples are prepared using field-collected dust samples. Environmental Lead Proficiency Analytical Testing 2 Four times a year Lead in Air on Filter (mg/m3) Each set includes four concentration levels of lead on 37-mm, 0.8 µm MCE filters. Air volumes are provided. Lead-in-Air samples are the same metals samples analyzed in the Industrial Hygiene Proficiency Analytical Testing (IHPAT) Program. Although there are two other metals on the filters, only lead is to be reported for the ELPAT Lead in Air Program.

(A2LA Cert. No. 3300.01) 05/07/2025 Page 3 of 3 PROGRAM NAME FREQUENCY ANALYTES MEASURED Bulk Asbestos Proficiency Analytical Testing3 Four times a year Asbestos Identification and Semi-Quantification (%) in Bulk Building Materials Bulk, real-world materials from abatement projects may contain any of the 6 regulated types of asbestos in a variety of matrices and binders typical of bulk building and insulation materials. PROGRAM NAME FREQUENCY ANALYTES MEASURED Beryllium Proficiency Analytical Testing4 Three times a year Beryllium on Filter (μg) Each set includes four concentration levels of beryllium, either beryllium acetate or beryllium oxide, on 37-mm, 0.8 µm MCE filters. PROGRAM NAME FREQUENCY ANALYTES MEASURED Environmental Microbiology Proficiency Analytical Testing5 Four times a year Fungal Spore Identification (Direct Exam) Identification of fungal spores from digital images using light microscopy. Twenty images are presented each round. Environmental Microbiology Proficiency Analytical Testing6 Three times a year Fungi Identification (Culture) Each set includes three pure isolates (lyophilized) of fungi for identification by culture. One blank is provided. Environmental Microbiology Proficiency Analytical Testing6 Three times a year Bacteria Identification (Culture) Each set includes three pure isolates (lyophilized) of bacteria for identification by culture. One blank is provided. 1The IHPAT Program is a consensus-based PT program. The assigned values and uncertainties are calculated based on reference group results. 2The ELPAT Program is a consensus-based PT program. The assigned values and uncertainties are calculated based on reference group results. 3The BAPAT Program uses an acceptance range based on multiple methods of analysis so there is no assigned value. Therefore, metrological traceability and uncertainty are not determined. 4The BePAT Program uses a certified reference material as the assigned value and to determine the uncertainty. 5The EMPAT Direct Exam Program is a consensus-based PT program. The expected value is verified by reference group results. 6The expected value for the EMPAT Culture Program (Fungi and Bacteria) is based upon reference materials that are traceable to a reputable culture collection and verified by the reference group.