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Context of 'August 1, 1994: EPA Specifies Methodology for Testing Asbestos in Air'

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The US Environmental Protection Agency (EPA) issues its Interim Asbestos NESHAP Enforcement Guidance on “Friable Asbestos,” which clarifies the definition and acceptable use of “asbestos-containing” materials. The National Emission Standards for Hazardous Air Pollutants (NESHAP), issued in 1973, defined “asbestos-containing materials,” or ACMs, as products that contain more than 1 percent asbestos by weight. Citing the original document, the guidance explains that NESHAP’s purpose was to “ban the use of materials which contain significant quantities of asbestos, but to allow the use of materials which would (1) contain trace amounts of asbestos that occur in numerous natural substances, and (2) include very small quantities of asbestos (less than 1 percent) added to enhance the material’s effectiveness.” However, the guidance stresses, the “EPA NESHAP definition of 1 percent by weight was not established to be a health-based standard.” [Stewart, 4/18/1989 pdf file]

Entity Tags: Environmental Protection Agency

Timeline Tags: Environmental Impact of 9/11

The EPA issues an advisory specifying the methodology that should be used to test for asbestos in air samples under the Asbestos Hazard Emergency Response Act (AHERA). The guidance recommends that transmission electron microscopy (TEM) be used rather than the older, less sensitive polarized light microscopy (PLM) method, which cannot detect ultrafine fibers below .25 micrometers. The advisory also states that when a PLM test is negative for asbestos, the sample should be retested using the TEM method. [Environmental Protection Agency, 8/1/1994]

Entity Tags: Environmental Protection Agency

Timeline Tags: Environmental Impact of 9/11

The EPA issues a publication which states that in the event of a terrorist attack causing the release of hazardous substances, the EPA would respond under the authority of the NCP (see 1972). “The US Environmental Protection Agency (EPA) has statutory authorities and responsibilities to prepare for and respond to emergencies involving oil and hazardous substances, pollutants or contaminants, which include chemical, biological and radiological materials that could also be components of a weapon of mass destruction (WMD)…. EPA carries out its preparedness and response efforts primarily under the mandate of the National Oil and Hazardous Substances Pollution Contingency Plan (NCP) and the Radiological Response Program.” [Environmental Protection Agency, 5/2000 pdf file]

Entity Tags: Environmental Protection Agency

Timeline Tags: Environmental Impact of 9/11

The Environmental Protection Agency’s (EPA) Region 2’s legal counsel advises in a draft document (obtained by the New York Environmental Law and Justice Project through a Freedom of Information Act): “[AHERA] was developed to determine whether school buildings where asbestos was used are safe. Under this test, an air monitor pumps room air through a special filter for a specified amount of time. Then the number of asbestos ‘structures,’ or fibers, on a square millimeter of the filter are counted. If there are fewer than 70 such structures, the air is judged to be acceptable. EPA has used this same school-based standard to evaluate the safety of outside air in downtown Manhattan.” [Jenkins, 3/11/2002 pdf file] The EPA counsel’s statement is a misinterpretation of AHERA (see October 3, 2001-March 1, 2004).

Entity Tags: Environmental Protection Agency

Timeline Tags: Environmental Impact of 9/11

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