Ambient air sampling report for 105 Duane Street, Feb 2002

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Summary of ambient air sampling and visual observations at 105 Duane Street following the WTC collapse.

NYC-WTC_000104027–000104320

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

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NYC 9/11 Public Portal Document

1 ATC Environmental, Inc. 104 East 25th Street 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: 10/25/01

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; , Vol. 52, No. 210, October 30, 1987

Sample Identification Analysis Parameters

I Project/Site: Related, Tribeca T.R. Various Sites Date Received: 10/25/01 105 Duane St., NY, NY TEM Sample No.: 5761 -

Grid Openings Analyzed: 62203

Project Sample No.: 30 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 s/mm2 Effective Area: 385 mm2 0.0044 s/cc

1 -•-------------------------------------------------------------------------------------------------------------------------------- FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION

I Single Fibers Bundles Clusters Matrix Struct. Total. Struct. Total Struct. >=5um Filter Struct/mm2 Air Struct/cc ngm/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

I Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

I Total asbestos (includes ambiguous structures) 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 e

Amphibole Asbestos Type: None detected ---------------------------------------------------------------------------------------------------------------------------------- The Analysis was carried out in accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

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

1 NYC-WTC 000104169

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NYC-WTC_000104169Source: NYC Law Department, mirrored locally

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Ambient air sampling report Book Two for 105 Duane Street, · Box DEP Box 36

NYC-WTC_000104321

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

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