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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_000176418
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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: 10/15/01

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber Identification by Selected-Area Electron Diffraction (SAED; and Energy-Dispersive X-RAY Spectrosccpy ‘EDS' Method: AHERA Final Rule, EPA Federal Register (40 CFR, Part 763), Vol. 52, No. 210, Octobei- 30, 1987

Sample Identification Analysis Parameters

/’roi ect/Site ; New Stui'vssiant H 345 Chambers St., NY. NY TPM Sample No.: 5691 6ioes Exrer £. 'Interior of Building & Roof Date Received: 10/15/01 Grid Openings Analyzed:__4

Project Sample No. .- N5HS - SIR-10/14 - 01 Average Grid Opening

Air Volume : ^Z^991;t^r£ Total Area Analyzed:^O.AAL^LJII’LZ

Filter Type; -MCE 25 ru dianu , Pore Size: 0.45 um Analytical Sensitivity; s/mxl Effective Area: 385 mm2 U . C: 04 E

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total S1 n g 1 £ ‘ Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct > = 5um Struct/mm2 Struct/c nam/ra3

Chrysotile Asbestos C 0 0 0 0 c c. c 0 . oooc c

Amphibole Asbestos 0 0 0 0 0 0 C.0 0 . 0000 c

Ambiguous 0 Cl 0 0 0 0 C.C 0.0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 C .0000 c Non-Asbestos 0 0 0 0 0 0 0.0 C.0000 N/A No Identification 0 C 0 0 0 0 c.c C . 0000 N/'A

Totals (All Structures) 0 c 0.0 0 . 0000 N/A The estimated uncertainty cf this analysis is i standard deviation.

Non-asbestcs 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 laboratcrv is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

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

CONFIDENTIAL, CITY_21MC100_003470005 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176418

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NYC-WTC_000176418Source: NYC Law Department, mirrored locally

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