Preliminary Environmental Assessment report, Jan 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

This sampling was intended to provide both comparative data to the previous sampling conducted at the site, and to provide data related to potential exposure from direct contact with building materials. Wipe sampling methods were employed to collect PCBs, PAL-Is, and metals (including mercury). Microvacuum sampling for asbestos was conducted. Sample locations were selected by dividing each floor into quadrants (North, East, West & South) and then sampling one quadrant per floor in a spiral down the building (16- North, 15-East, 14 South, 13-West, etc.). This sampling provides illustrative data results for each quadrant of the building for both higher, middle, and lower floors without oversampling.

PCBs and PAHs were collected on sterile gauze pads treated with a 4:1 acetone/hexane mixture, while metals were collected on ghost wipes. Samples were placed in sealed bags/jars and kept cold during transport and submittal to the approved analytical laboratory.

4.6.2 Mercury Vapor

Direct reading samples for mercury vapor taken using a Lumex RA 915+ portable mercury analyzer. Tours of accessible spaces were conducted with this handheld instrument throughout the building. Sampling was performed on all floors of the building.

4.6.3 Air Sampling

Personal air monitoring was conducted to gather CoPC data related to the impact to ambient air of work activity in the building, as discussed in Section 4.2 above.

4.7 Waste Characterization

Waste characterization testing of dust, building components and deconstruction debris categories is to be conducted upon review and approval of Regulatory Submittal Part IV — Waste Sampling & 12

NYC-WTC 000095699