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Ambient air sampling report Book Two for 105 Duane Street,

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Second volume of ambient air sampling and visual observation results for 105 Duane Street after the WTC collapse.

NYC-WTC_000104321–000104551

Folder label: “105 DUANE ST 1001650, 151/1

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NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street I New York, New York 10010

ATC Associates Inc. Approved N.Y. State ELAP #10879 104 East 25th Street ACCREDITED NVLAP Lab Code # 1187 New York, NY 10010 Report Date: 10/26/01

I ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber Identification by Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy !EDS; Method: AHERA Final Rule, EPA Federal Register (40 CFR, Part 763), Vcl. 52, No. 210, October 30, 1937

Sample Identification Analysis Parameters

Project/Site: Tribeca Towers, 105 Duane St., NY, NY TEM Sample No.: 5770 - 62555

I Date Received: 10/26/01 Hallways Grid Openings Analyzed: 6

Project Sample No.: H-1 Average Grid Opening: 106.00 um

Air Volume: 1300 liters Total Area Analyzed: 0.0674 mm2

Filter Type: MCE 25 mm diam., Pore Size: 0.45 um Analytical Sensitivity: 14.8 s/mm2 Effective Area: 395 mm2 0.0044 s/cc

----------------------------------- FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. struct. Filter Air Fibers Bundles Clusters Struct. Struct, s=5um

Struct/mm2 Struct/cc nom/m3

Cnrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Ambiguous 0 n 0 0 0 0 0.0 0.0000 0

Total asbestos (includes ambiguous structures)

I Non-Asbestos No Identification 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 0.0 0.0000 0.0000 0.0000 0 N/A N/A

I Totals (All Structures) The estimated uncertainty of this analysis is 1 standard deviation. 0 0 0.0 0.0000 N/A

----------------------------------------------------------------------------------------------------------------------------------

Non-asbestos fiber i.d. (EDS/SAED): None detected ' Amphibole Asbestos Type: None detected ---------------------------------------------------------------------------------------------------------------------------------- The Analysis was carried out in accordance with the approved TEM - iod. This laboratory is in compliance with the quality specified r ethod.

I Analyzed by: Report Revie

Marek Peysakhov Michael A. Go, Director of El

NYC-WTC 000104324

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NYC-WTC_000104324Source: NYC Law Department, mirrored locally

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