Preliminary environmental assessment report, 30 Warren Street, January 2006

NYC 9/11 Public Portal Document

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

need to expend time and resources delineating contaminated versus uncontaminated materials and spaces. The investigation therefore focuses on the nature of the Building materials, other materials and objects that remain within the Building and the structure and lay-out of the Building as it relates to the remediation and deconstruction process.

This investigation concludes that an environmental remediation involving the removal of all non-structural components remaining within the building, followed by a thorough cleaning and encapsulation of all remaining structural components is the safest and most efficient means to prepare the building for deconstruction.

In brief, other conclusions of note include the following:

Asbestos Monitoring: Testing conducted as required by the New York State Department of Labor under Industrial Code Rule 56 (56-17), indicates that the installation and operation of the site access facility at the northwest corner of the building has not resulted in the release of asbestos to the outside of the building. All sample results are within acceptable limits.

Personal Exposure Testing: The results of personal exposure sampling conducted to date indicate that the personal protective equipment specified in the original site Health & Safety Plan is sufficient personal protection for the contaminants tested for during the activities conducted to date.

Exterior Facade: Cleaning of the exterior fagade of the Building conducted by the NYC DEP as a part of its WTC response was effective, and re-cleaning of the majority of the fagade is not necessary or advisable. Cleaning of the lower two floors where urban background road dust has accumulated will be conducted, and focused cleaning of limited fagade components that exhibit residual dust will be conducted as a part of the remediation/deconstruction Project. A more detailed discussion of fagade conditions and their impact on tte Project can be found in a companion document, Facade Characterization Report, December 23, 2005.

Asbestos-Containing Building Materials: While extensive abatement of asbestos-containing

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