Asbestos assessment report, 3 World Financial Center, Apr 2002

NYC 9/11 Public Portal Document

a PRIVILEGED and CONFIDENTIAL Prepared at the Request of Counsel

3.0 Findings and Discussion

3.1 Asbestos Dust

project, Emteque Corporation and During the initial, emergency response phase of the assessment of asbestos JLC Environmental Consultants, Inc, conducted an of the building from contamination, which was initially suspected in the Southeast corner Bulk debris samples were the Lobby level to Floor 26, as well as the set-back roofs. Corporation and by JLC collected on September 29 and 30, 2001, by Emteque Emteque Environmental, Inc., on September 27 — 28, 2001. On October 24, 2001, Floor 10. Corporation collected additional bulk debris samples, from street level to southeast Asbestos contamination was determined to be isolated to the damaged abated under DEP's comer of the building on floors Lobby —3 and 17-26. This was temporary wall to emergency cleanup guidance in order to permit the construction of a contractor, AMEC. close the building and the removal of debris by the City's demolition

October 30, 2001, on EMG commenced a comprehensive asbestos assessment on furniture, fixtures, and floors 2 — 52. Bulk dust samples were collected from surfaces of and equipment below the suspended ceiling system, as well as from HVAC systems components above the suspended ceiling, and inside the core ventilation fan units. the Additional bulk samples were collected from HVAC systems or components using and micro-vacuum sampling method established by the American Society for Testing Materials (ASTM) Test Method D 5755-95.* In either case, efforts were made by the personnel collecting the bulk samples to minimize fiber release. Personal protective

* recognize micro-vacuum In a memorandum dated September 14, 2001, DEP stated that it does not However, the ASTM sampling for the purpose of determining whether a material is asbestos-containing. ACM has resulted in micro-vacuum method provides an accurate determination as to whether disturbed addition to DEP-approved surface contamination. Therefore, this method was used on this project, in plenum (above protocols, to assess the presence of asbestos in settled dust in the open return air suspended ceilings), on HVAC system components and inside ductwork.

5 April 18, 2002

NYC-WTC 000094862