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Asbestos fiber analysis by TEM, New York City schools, Oct

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ATC Environmental lab report detailing asbestos fiber identification via TEM and EDS methods at a school site in October 2001.

NYC-WTC_000176435
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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; 10/20/01 ASBESTOS FIBER /ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber Identification by Selected-Area Electron Diffraction (SASD) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method; ZiHERA Final Rule, SPA Federal Register (40 CFR, Part 763*, Vol. 52, No. 210, October 30, 1987

Sample Ids'ntification Analysis Parameters

Project/Site: Nevz Stuyvesaht H.S., 345 Chambers St., NY, NY TEM Sample No.; 5730 61711 Various Sites J'nside and Outside the Building Date Received: 10/19/01 Grid Openings Analyzed:__ 4

Project Sample No,: 21 Average Grid Opening: 106.00 urn

Air Volume-.196 e Jyterp Total Area Analyzed: 0.0450 mm2

Filter Type; MCE 25 mm diain. Pore Size: 0.45 urn Ana1ytica1 Sensitivity; 22,2 s/mm2 Effective Area: 365 mm2 0.0044 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct . Filter Air Fibers Bundles Clusters Struct. Struct >=5um Struct/mrn2 Struct/cc ncnn/m3

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 c

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total asb€;stos (includes ambiguous structures) 0 0 o.c 0.0000 c Non-Asbest.os 0 0 0 C 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 estimc.ted 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:

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

CONFIDENTIAL, CITY_21MC100_003470181 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176435

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NYC-WTC_000176435Source: NYC Law Department, mirrored locally

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