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NYC-WTC_000204914

Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000204914–000204917
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NYC 9/11 Public Portal Document [Patrice Arnistrong - Bldg27.wpd Page 3j

J Summarj' of Asbestos Sampling Results Page 1 of 2

Address: 100 Jolm Street I Date sampled: Dec 3, 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 will count the fibers present to give an estimate of fiber content as a percent.

Area Sampled Outside Common Residence 1 Residence 2 Sample Numbers SA-O-27 VA-C-27 VA-Rl-27 VA-R2-27

Asbestos present in dust: None None None None i Chrj'sotile asbestos

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 1%. 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.

Area Sampled Outside Common Residence 1 Residence 2 Sample Numbers SA-O-27 VA-C-27 VA-Rl-27 VA-R2-27 Asbestos present in dust < 1% < 1% <1% None Chrysotile

CITY_21MC100_008986992

NYC-WTC_000204916

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NYC-WTC_000204916Source: NYC Law Department, mirrored locally

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Asbestos sampling summary report, Nov 2001

NYC-WTC_000176137

Summary report detailing air and settled dust sampling results from a residential building, including methods for fiber analysis.

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