Fax cover sheet for WTC-related correspondence, July 7, 2003

NYC 9/11 Public Portal Document

DEP LEGAL AFFAIRS Fax:17105956543 Jul 7 2003 9:12 P. 13

The demolition of all WTC complex buildings to ground level was completed by late December 2001. WTC 4 and WTC 5 were brought down using a vertical impact system similar to a pile driver.by wrecking balls! Section 27-1039d of the New York Citv Building Code This meifaed of britwng dow a. building require approval of the Borough Commissioner of the Pet» of Buildings to use this method of demolition. The appropriate 1.♦MWailaaiiHaiissoner was consulted and '

grapplersand jpg shears. A photo of a ■ is attached at A ■wife^speci Both N¥<^DC and QSHA official told ns thattThe WTG site was under continuous dust suppression.fff this is hot acceptable then we suggest as^ alternative “EPA officials were at the site and observed that the site was under continuous dust suppression.” OSHA officials told us that this dust suppression was very successful, and (hat two minutes after demolition you could see across the space where the buildings had been. They Although OSHA officials 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, there was no need to do this as there was no asbestos-containing . I'

Treatment of Asbestos-Containing Materials Both NYCDDC and EPA officials told u$ 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^ I

EPA Situation Reports confirmed the NYCDDC official’s statement about asbestos abatranents 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; ZWefvc (12) btdk asbestos samples were taken in the Bl, B2, B3, levels of (WTC) Building 6. The samples weretakenfromsprayed on insulation at the request ofNYC DOL Of the twelve samples, nine (9) should (sic) results were in excess ofl% Chrysotile asbestos, the results rangedfrom 1,30% tif 30.80%. The three samples that were not above 1% were detectfor Chrysotile asbestos. These samples

NYC-VVTC_000146063