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

5.7 Waste Characterization Testing

Preliminary testing of WTC dust within the building will be conducted to identify areas of the building where concentrations of RCRA — regulated contaminants within WTC dust may exist. These preliminary results will be used to guide decisions on testing and management of building contents and components impacted by the dust. Waste characterization for purposes of informing decisions on waste handling, packaging, transport and disposal is to be addressed in a companion document, Regulatory Submittal Part IV - Waste Sampling and Management Plan (WSMP), to be submitted with the regulatory submittals for the project. Waste characterization is an aspect of the project to be very closely monitored by the regulatory community, and is work that will be subject to a Quality Assurance Project Plan (QAPP). As such, it is recommended that the testing supporting this aspect of the project be conducted after review and approval of the WSMP and its associated QAPP by the Regulators.

5.8 Visual Inspection for Mold

Visual inspections for mold impact were conducted, and are ongoing as conditions change within the building over time. In general, mold impact is limited to the upper floors, and is most prevalent on the south side of the building where the facade was destroyed. While limited visible mold does exist, it will have little or no impact on the planning and execution of the environmental remediation and deconstruction of the building.

6iL Standards of Care

Airtek's work was performed in a professional manner. Our objective was to perform our work with care, exercising the customary skills and competence of consulting professionals. Conclusions presented in this report are professional opinions based upon visual observations of the site and laboratory results provided for review. These conclusions reflect only the results obtained and analyzed from specific sample locations. The opinions and recommendations presented herein apply to site conditions existing at the time of our observations. Airtek cannot act as insurers, and no expressed or implied representation or warrant is included or intended in our report except that our work was performed within the limits prescribed by our clients, and

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