EPA report excerpt on NYC building owner guidance, June 2003

NYC 9/11 Public Portal Document

WTC 5 - North Plaza Partial collapse

WTC 6 - U.S. Customs Partial collapse

WTC 7 Complete collapse

Source: New York City DoB/DDC/Structural Engineers Association of New York Cooperative Building Assessment, November 7, 2001.

The demolition of all WTC complex buildings to ground level was rompleted by late December 2001. WTC 4 and WTC 5 were brouglUdownby i^rcckin^bali^ This method of bringing down a building had bee^utlaw^ in N^ York for over two decades, but an exception was granted un3er the special circumstances that existed after the terrorist attack. WTC 6 was brought down with “special remote cutting shears.” ‘|f*f****^

Both NYCDDC and OSHA officials told us that the WTC site was under continuous dust suppression. OSHA officials told us that this dust suppression was very successful, and that two minutes after demolition you could see across the space where the buildings had been. They further stated that it would have been too dangerous to send abatement contractors into WTC 4, WTC 5, or WTC 6 to remove asbestos-containing material before demolition.

Treatment of Asbestos-Containing Materiais

Both NYCDDC and EPA officials told us that when asbestos-containing material (e.g., pipe wrapping, steel insulation) was encountered during the removal, it was tested and treated in accordance with asbestos abatement procedures. According to the NYCDDC official, the majority of the asbestos-containing material was encountered when removing the remnants of the basement levels of WTC 6 below the slurry wall.

EPA Situation Reports confirmed the NYCDDC official’s statement about asbestos abatements at the site. The reports recorded instances where asbestos was found during debris removal and asbestos abatements performed. For example, the EPA May 23,2002, situation report noted that:

NYC-WTC_000146083