Chain of Custody Form Instructions for WTC Building Sampling

NYC 9/11 Public Portal Document

Results of Fiber Analyses

Results of fiber analyses in air and dust samples from 30 residential buildings (1-30) in lower Manhattan and 4 comparison buildings (31-34) above 59th Street. The range of values measured in the comparison buildings is shown in the summary of comparison areas above 59th Street.

Results From Air Samples Results From Dust Samples

Building Fibers in Air Asbestos in SVF in Air Asbestos in Asbestos in Dust SVF in Dust Number Sample Location PCM (f/cc) Air TEM (f/cc) SEM (f/cc) DustPLM(%) TEM(%) PLM (%)

Summary of Comparison Areas Above 59th Street

Outside <■001-0.001 NA ND-<.000043 Not Sampled Not Sampled Not Sampled

Common <.001-0.002 NA ND-0.000043 ND ND ND

Residences <.001-0. ass NA ND-0.000087 ND ND ND

Results for Individual Buildings Sampled In Lower Manhattan (Buildings 1-30) 1 Outside 0.001 ND <1 22 1 Common <^ Not Sampled Not Sampled Not Sampled 1 Residence 1 0.006 <.001 0.000162 ND NA 20 1 Residence 2 <.001 ND NA 20

2 Outside 0. ass <1 1.2 28 2 Outside colocated Not Sampled Not Sampled Not Sampled 1.3 NA 25 2 Common 0.005 <.001 0.000255 ND NA 27 2 Residence 1 <.001 ND NA 25 2 Residence 2 0.002 ND NA 20 2 Window sill Not Sampled Not Sampled Not Sampled <1 <1 30

3 Outside <.001 Not Sampled Not Sampled Not Sampled 3 Res 2 colocated <.001 Not Sampled Not Sampled Not Sampled 3 Common <.001 Not Sampled Not Sampled Not Sampled 3 Residence 1 <.001 Not Sampled Not Sampled Not Sampled 3 Residence 2 <.001 Not Sampled Not Sampled Not Sampled

4 Outside 0.001 Not Sampled Not Sampled Not Sampled 4 Outside colocated <.001 Not Sampled Not Sampled Not Sampled 4 Common 0.001 ND <1 15 4 Common co-located 0.001 Not Sampled Not Sampled Not Sampled 4 Residence 1 <.001 ND <1 2 4 Residence 2 0.001 ND <1 5

5 Outekte 0.002 3.4 NA 25

100

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