NYC 9/11 Public Portal Document
10/01/2001 10:43 FAX 212 353 8308 ATC - 171018/020
ATC Environmental, Inc.
104 East 25th Street
New York, New York 10010
N.Y.C. Housing Authority Approved N.Y. State ELAP #10879
250 Broadway, 16th Floor ACCREDITED NVLAP Lab Code # 3.187
New York, NY 10007 Report Date: 09/16/01
ASBESTOS-FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM)
With Fibor Idcatitieation by 8o1ected-Area Electron Ditfrantion (S m) and Energy-Dispersive X-RAY spectroscopy (ED$)
Hathods ).4BRA Final Rule, EPA Federal Register (40 CFR, Pnrt 7631, Vol. 52, No. 210, October 30, 1987
samolo Idan i£i at on Analvsii Parameters
Project/Site: 250 Rroadway. NY. ST TEM Sample No. a $512 - 59085
floors 31,_27. 19. 9
Date Rccoiveds 09 1 01 Grid Openings Analysods4
Project Sample No.; ytl Average Grid Openings 106.00 um
Air Volume: 1800 liters Total Area y 4 5Q mm2
Filter Types MCE 25 mm diam., Pore Sizes 0.45 um Analytical Sensitivity: 22.2 a1an2
Effective Area: 385 mma 0.0048 C/cc
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FIBROUS _ 1 2TICULATES ANALYZED
Number observed CONCENTRATION
Total
single Matrix Total. st::uct. Filter Air
Fibers Bundles clusters 3trVOt. StruCt. a-5um Strsct/n2 Struet/cc nam/m3
Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0300 0
Ampbibola Asbestos 0 0 0 0 0 C 0.0 0.0000 0
Ambiguous 0 0 0 0 0 0 0.0 0.0000 0
Total aaboctoc (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
Totalo (All Structures) 0 0 0.0 0.0000 N/A
The estimated uncertainty of this analysis is 1 standard deviation.
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Non-asbestos fiber i.d. (EOS/SAED): None detected
Amphibole Asbestos Type: None detected
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The Analysis was carried out in accordance with the approved TEM method.
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This laboratory is in compliance with the quality specified for the meths
Analyzed by: Report Reviewed by:
Roman Peysakhov Michael A. Gorycki, Ph.D.
Director of Electron Microscopy
NYC-WTC 000106090
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