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On October 17, 1989, an earthquake struck the San Francisco Bay Area of California damaging many buildings. Because of the concern over the possible exposure to asbestos in the damaged buildings, building owners and managers hired RJ Lee Group (RJLG) to collect air samples in suspect buildings. Our experts analyzed a total of 419 air samples from 55 buildings (schools, universities, commercial / public, and residential buildings) using transmission electron microscopy (TEM) in accordance with the EPA AHERA and Level II analytical protocols. The results indicated that asbestos levels differed little from outdoor levels, even immediately after the earthquake. Exceptions to this were samples collected in the vicinity of debris clean-up and in the building undergoing abatement, which were higher than the indoor or outdoor samples. However, these samples generally had concentrations below the AHERA clearance levels and all were well below the OSHA action limit.
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