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Asbestos fiber analysis by TEM, New York City schools, Oct
Machine-extracted title · confidence 50%ATC Environmental lab report detailing asbestos fiber identification via TEM and EDS methods at a school site in October 2001.
NYC-WTC_000176424Page image
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NYC 9/11 Public Portal Document
ATC Environmental, Inc. 104 East 25th Street New York, New York 10010 N.Y.C. Board of Education Approved N.Y. State ELAP #10879 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY 11101 Report Date: 10/18/01
ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber Identification oy Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method; AHER7k Final Rule, EPA Federal Register (40 CFR, Part 763), Vol. 52, No. 210, October 30, 1987
Sample Identification Analysis Parameters
Froject/Site; Nev; Stuyvesant H.S., 345 Chambers St., NY, NY TEM Sample No.: 5725 61645 Exterior S. Interior of Building &. Roof Date Received: 10/18/01 Grid Openings Analyzed:__ 4
Project Sample No . : i .3 Average Grid Opening; 106.00 urn
Air Volume:19361iter? Total Area Analyzed: 0.0450 mm2
Filter Tvoe: MCE 25 mm diam. Pore Size: 0.45 urn Analytical Sensitivity; 22.2 s/mm2 Effective Ares; IP5 mTn2 0.0044 s/cc
FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single- Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct >=5um Struct/mm2 Struct/cc nqm/m3
Chrysotile /isbestos 0 0 0 0 0 c 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 c
Total asbestos (includes ambiguous structures) 0 0 0.0 0.0000 Non Asbest.os 0 0 0 0 0 0 C.0 0.0000 N/A No Identification 0 0 0 0 0 0 C.0 0 . 0000 N/A
Totals {All Structures) 0 0 C.0 0.0000 N/A The estimeited uncertainty cf 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:
Michael A. Gorycki, Ph.D. Michael A. Gorycki, Ph.D. Director of Electron Microscopy
CONFIDENTIAL, CITY_21MC100_003470129
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176424
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NYC-WTC_000176424Source: NYC Law Department, mirrored locally
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