NYC 9/11 Public Portal Document
I
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: 10/20'/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 753', 'To: SO. No. 210, October 30, 1980
Sample Identification Analysis Parameters
Project/Site: Tribeca Towers, 105 Duane St., NY, NY TEM Sample No. : 5771 - 62576
Various Sites
Date Received: 10/26/01 Grid Openings Analyzed: 6
Project Sample No.: 12 Average Grid Opening: 106.00 um
Air Volume: 1300 liters Total Area Analyzed: O.C674 mm2
Filter Type: MCE 25 mm diam., Pore Size: 0.45 um Ana'-vt_ca1 Sensitivity: 14.8 s/mm2
Effective Area: 385 mm2 C. 0044 s/cc
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FIBROUS PARTICULATES ANALYZED
Number Observed CONCENTRATION
Tota,
Single Matrix Total. Struct. Filter Air
Fibers Bundles Clusters Struct. Struct. ,=5um Struct/mm2 Struct/cc nom/m3
Chrysotile Asbestos 0 0 0 0 0 3 0.0 0.0000 0
Amphibole Asbestos 0 0 0 0 0 0 0,0 0.0000 0
Ambiguous 0 0 0 0 0 3 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 I standard deviation.
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Non-asbestos fiber i.d. (EDS/SAED): None detected
Amphibole Asbestos Type: None detected
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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:
Marek Peysakhov
I Michael A. Gorycki, Ph.D.
Director of Electron Microscopy
NYC-WTC 000104361
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