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

The inventory is included in Attachment VII.

4.8 Visual Inspection for Mold Periodic visual inspections for microbiological growth have been conducted and are conducted periodically. Ongoing water incursion into the building has resulted in mold conditions that change over time.

5.0 Investigation Results

5.1 Site Access 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. Daily sampling for asbestos has been conducted, samples have been analyzed by TEM (AHERA), and all sample results are within acceptable limits (70s/mm2). A data summary is included Attachment I.

5.2 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: Asbestos: All results < OSHA PEL (0.1 f/cc) Metals: All results < OSHA PELs (Various — Attachment II) Mercury Vapor: All results < OSHA PEL (50ug/m3) Respirable Dust: All results < OSHA PEL (5mg/m3) Silica: All results below OSHA PEL (10mg/m 3/%quartz+2)

53 Exterior Dust Investigation

Cleaning of the exterior facade 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 facade is not necessary or advisable. Cleaning of the lower two floors where urban background road dust has accumulated 14

NYC-WTC 000096580