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ASBESTOS CONCENTRATIONS IN TWO YEARS AFTER ABATEMENT IN SEVENTEEN SCHOOLS
Citation:
Kominski, J., R. Freyburg, J. Brownlee, AND D. Gerber. ASBESTOS CONCENTRATIONS IN TWO YEARS AFTER ABATEMENT IN SEVENTEEN SCHOOLS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-92/027 (NTIS PB92158476), 1992.
Description:
Airborne asbestos concentrations were measured at 17 schools that underwent an asbestos abatement 2 years before in 1988. hese 17 schools, which involved 20 abatement sites, were part of a study conducted by the U.S Environmental Protection Agency (EPA) and the New Jersey Department of Health (NJDOH) in 1988. he 1988 study showed that asbestos concentrations measured independently by the NJD0H and EPA during the clearance phase of the abatement were elevated in the abatement and perimeter areas compared with outdoor concentrations. he present study was conducted to determine the current levels of airborne asbestos under simulated occupancy conditions and to determine whether the elevated levels found during the clearance phase were still present 2 years after abatement. n 1990, four sites showed significantly higher mean asbestos concentrations inside the building (i.e., the previously abated area and/or perimeter area) compared with those outdoors (p<0.05). n 1990, the mean asbestos concentration measured in the perimeter area at one site and in the previously abated area at two sites were significantly higher than those in 1988 (p<0.05). Variations in asbestos levels between 1988 and 1990 may be due to sampling techniques (passive and aggressive versus modified aggressive), residual air-entrainable asbestos from the 1988 abatement, or air-entrainable asbestos from operations and maintenance activities since 1988.
