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Airtek re-occupancy notice and chain of custody, 176 Broadway

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Airtek Environmental Corp. submits a notice of air quality testing results and chain of custody forms for 176 Broadway in October 2001.

NYC-WTC_000105771–000105777

Folder label: “176 BROADWAY; Block: 65 Lot: 17 BIN: 1001100 3-7 Maiden Lane

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NYC 9/11 Public Portal Document

Summary of Asbestos Sampling Results Page 1 of 2

Address: 176 Broadway Date sampled: Nov 28, 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.

lArea Sampled Outside Common VA-C-22 IResidence 1 A-R1-22 Residence 2 JA-R2-22 Sample Numbers SA-O-22

A.sbestos present in dust: Chrysotile asbestos one Detected None Detected lone Detected Tone Detected

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

lArea Sampled utside j Common Residence 1 Residence 2 Sample Numbers SA-O-22 A-C-22 A-R1-22 A-R2-22 Asbestos present in dust None Detected None Detected one Detected None Detected Chrysotile

]:\Summary of Asbestos Sampling Results.doc

NYC-WTC 000105776

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NYC-WTC_000105776Source: NYC Law Department, mirrored locally

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