Preliminary environmental assessment report, 30 Warren Street, January 2006

NYC 9/11 Public Portal Document

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

Airtek also conducted representative confirmatory sampling throughout Fiterman Hall for comparison to data from other WTC sites, and to published contaminant reference points. As an additional point of reference, Airtek reviewed WTC-specific human health risk assessment findings for the levels and types of contamination detected in the Building. The assessments determined that the potential impact of this contamination on healthy occupants and sensitive sub-populations including, but not limited to, pregnant women, children, the elderly, and immuno-compromised individuals was significant. The primary drivers of risk in the reviewed data were dioxin and lead. These are two of the contaminants of potential concern detected at elevated levels at Fiterman Hall.

Figure 1 CoPC Data from Previous Investigations At 30 West Broadway-Fiterman Hall

Asbestos Micro-vacuum to 1,677,624 s/cm2

Mercury Wipe Samples 0.68 to 27 ng/sf

Dioxin/Furans Wipe Samples 0.65 to 64.69 ng/in2

PCBs Wipe samples 23 samples - None Detected

Antimony Wipe samples <0.9 to 37 ug/sf Arsenic Wipe samples <0.45 to 22 ug/sf Beryllium Wipe samples 0.038 to 0.14 ug/sf Cadmium Wipe samples <0.19 to 14.7 ug/sf Chromium Wipe samples <0.45 to 140 ug/sf Copper Wipe samples <1.0 to 1,630 ug/sf Iron Wipe samples <10 to 132,000 ug/sf Lead Wipe samples <1.4 to 1226 ug/sf Manganese Wipe samples 0.20 to 1,140 ug/sf Nickel Wipe samples <0.6 to 132 ug/sf Zinc Wipe samples <3.3 to 15,900 ug/sf

Cadmium Bulk Sample 1.45 to 30.3 mg/kg Chromium Bulk Samples 11.5 to 271 mg/kg Copper Bulk Samples 198 to 838 mg/kg Iron Bulk Samples 7,150 to 27,800 mg/kg Lead Bulk Samples 68.7 to 744 mg/kg Manganese Bulk Samples 0.20 to 1,140 mg/kg Nickel Bulk Samples 8.07 to 101 mg/kg Zinc Bulk Samples 486 to 13,400 mg/kg

NYC-WTC 000096573