NYC 9/11 Public Portal Document
n
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: 10/26/01
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
1 Sample Identification Analysis Parameters
Project/Site: Tribeca Towers, 105 Duane St., NY, NY TEM Sample No.: 5771 - 62581
Various Sites
Date Received: 10/26/01 Grid Openings Analyzed: 6
Project Sample No.: 17 Average Grid Opening: 106.00 um
A~.r 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: 385 mm2 0.0044 s/cc
----------------------------------------------------------------------------------------------------------------------------------
FIBROUS PARTICULATES ANALYZED
Number Observed CONCENTRATION
1 Single
Fibers Bundles Clusters
Matrix
Struct.
Total.
Struct.
Total
Struct.
>=5um
Filter
Struct/mm2 Struct/cc
Air
nam/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 U 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 with 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 000104366
OCR can misread numbers and units. Confirm readings against the page image before using them.