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← Document results/DEP Box 36/105 DUANE ST 1001650, 151/1
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Ambient air sampling report Book Two for 105 Duane Street,

Machine-extracted title · confidence 98%

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

I ATC Environmental, Inc. 104 East 25th Street New York, New York 1001C

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

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). Vol. 52, Nc. 210, October 30, 1987

Sample Identification Analysis Parameters

Project/Site: Tribeca Towers, 105 Duane St. , NY, NY TEM Sample No.: 5070 - 62561 Hallways Date Received: 10/26/01 Grid Openings Analyzed: 6

Project Sample No.: H-7 Average Grid Opening: 106.00 um

Air Volume: 1300 liters Total Area Analyzed: 0.0674 mm2

Filter Type: MCE 25 mm diem., Pore Size: 0.45 um Analytical Sensitivity: 14.8 5/mmZ Effective Area: 385 mm2 0.0C44 s;'cc

-----------------------------------------------'---------------------------------------------------------------------------------- FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION

I Single Fibers Bundles Clusters Matrix Struct. Total.

Struct. Total Struct. >=5um Filter Struct/mm2 Struct/cc Air norm/m3

Chrysotile 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 0 0 0 0 0 0.0 0.0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 0.0000 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A No Identification 0 0 0 0 0 0 0.0 0.0000 N/A

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

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

' Non-asbestos fiber i.d. (EDS/SAED): None detected Amphibole Asbestos Type: None detected -----------------------------------------------------------

' The Analysis was carried out in accordance wi:h the approved TEM method. This laboratory is in compliance with the quality specified for the method.

' Analyzed by: Report Reviewed by:

Marek Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

I NYC-WTC 000104330

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NYC-WTC_000104330Source: NYC Law Department, mirrored locally

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