Asbestos-containing materials in school buildings: bulk sample analysis quality assurance program. Bulk sample rounds 12, 13, and blind round III. Final report
The report presents the results of laboratories participating in the twelveth, thirteenth, and third (III) blind round of the bulk sample analysis quality assurance program sponsored by the U.S. Environmental Protection Agency. Three hundred twenty-three, 386, and 51 laboratories that analyze bulk samples (by polarized light microscopy) to determine asbestos content participated in these rounds, respectively. Laboratories received bulk samples of asbestos, asbestos substitutes, or other bulk-insulation materials. Three aspects of analytical results were considered: classification of a sample as either asbestos (positive) or nonasbestos (negative); identification of the specific type of asbestos present; and quantitation of the relative amount of major constituents present. A performance rating was assessed for each laboratory, based only on the ability to correctly classify samples. Reductions of a possible 4/4 correct score was made only for the reporting of false positives and false negatives. Samples were correctly classified as asbestos or non-asbestos containing materials (as described in Federal Register, Vol. 47, No. 103, Thursday, May 27, 1982) by 98.5%, 98.6% and 96.7% of the laboratories participating in rounds twelve, thirteen and third blind round, respectively.
- Research Organization:
- Research Triangle Inst., Durham, NC (USA)
- OSTI ID:
- 5101591
- Report Number(s):
- PB-86-222353/XAB
- Country of Publication:
- United States
- Language:
- English
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99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ASBESTOS
INDOOR AIR POLLUTION
SCHOOL BUILDINGS
CHEMICAL ANALYSIS
QUALITY ASSURANCE
SAMPLING
AIR POLLUTION
BUILDINGS
EDUCATIONAL FACILITIES
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500200* - Environment
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552000 - Public Health