Asbestos Dust Sampling Results, 180 [name], Dec 2001

NYC 9/11 Public Portal Document

[Andrew Goodman - Summary of Asbestos Sampling Results122801 .doc Page 29J

Summary of Asbestos Sampling Results Page 1 of2

Address; 180 Park Row Date sampled: Dec 4, 2001

Dust samples Fibrous materials in dust found by Polarized Light Microscopy (PLM) Analysis: Polarized Light Microscopy identifies asbestos fibers by shape and optical characteristics. Other fibers such as fabric (synthetics), paper (cellulose) and fiberglass may be identified in the analysis. The laboratory analyst counts the fibers present to give an estimate of fiber content as a percent. I Area Sampled Outside Common Residence 1 Residence 2 I Samjrle Numbers No Dust No Dust VA-Rl-30 VA-R2-30 Available Available

Asbestos present in dust: No Dust No Dust Cluysotile asbestos Available Available None Detected None Detected

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Asbestos in dust as determined by Transmission Electron Microscope (TEM) Analysis: I TEM analysis was conducted on all dust samples, which showed asbestos content, by PLM as less than 1%. TEM analysis is very specific, can detect smaller fibers of asbestos and is sensitive to fewer inteiferences. This analysis was done to confirm the PLM findings of no asbestos shown above.

Area Sampled Outside Common Residence 1 Residence 2 Samjrle Numbers No Dust No Dust VA-Rl-30 VA-R2-30 Available Available Asbestos present in dust No Dust No Dust Chrysotile Available Available None Detected None Detected I

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