Remediation report cover, 30 Warren Street, January 2006

NYC 9/11 Public Portal Document

Environmental Site Characterization — Facade Report Fiterman Hall — 30 West Broadway, New York, NY Airtek project 05-0867 — January 10, 2006

3.0 CHARACTERIZATION FINDINGS

3.1 Documentation Review

Reviews of existing documentation and drawings indicate that the building facade is composed of an exterior brink and masonry fascia that is backed by structural steel and block. The interstitial space between the brick fascia and the steel and block structural backing was filled with sluiced mortar during construction. This detail was confirmed by destructive testing of the interior of the facade.

Communicating openings are limited to entry doors and the loading dock of the ground floor, operable windows on all floors, doors to setback roofs, and mechanical system louvers and vents. Pipe Chases do exist in the facade, but these chases are accessible for cleaning from the interior of the building.

3.2 Interviews — Historical Research

Interviews with facility operations and management personnel familiar with the history of the Building indicate that the entire ribbon window system that rings every floor of the Building was replaced in its entirety in the mid 1990s. Close visual inspection of the condition of the window system supports this assertion. Both masonry opening caulk (rubberized) and glazing material (rubberized) are intact. Interviews with NYC DEP personnel familiar with the NYC DEP Facade Cleaning Program reveal that the Fiterman Hall facade, with the exception of the gash area, was cleaned by a NYS DOL certified asbestos contractor. As noted below, close visual inspection and laboratory testing confirms this assertion. Bulk debris from the collapsed WTC 7 was removed from the gash area of the Building by the NYC DDC during the WTC response of 2001-2002.

3.3 Facade Visual Inspection

A close visual inspection was conducted floor-by-floor by Airtek inspectors. The inspection focused on determining if WTC debris remained on the facade after the building had been cleaned by the NYC DEP, and on the structural integrity of the facade and window system as a potential component of the barrier system to be used to contain contaminants during the abatement of asbestos and CoPCs from the building.

Debris:

The visual inspection revealed no remaining debris on the facade of the upper floors of the building, and very little debris on the facade of the lower floors. Isolated locations where debris remains have been identified for focused cleaning as a part of the abate, ent phase of the project. These locations include the Gash Area, specified areas of the second floor, and the entire first floor facade. Most areas of the second floor and first floor facade do not exhibit WTC-type debris, but exhibit build-up of background urban dust and road dust from the construction that has occurred in the vicinity. These areas will be targeted for focused cleaning.

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