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Chain of Custody for Asbestos Fiber Analysis at P.S. 234M,

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Documentation of asbestos fiber analysis by TEM performed on samples from P.S. 234M received on May 21, 2002.

NYC-WTC_000181750–000181768
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NYC 9/11 Public Portal Document

ATC Associates 104 East 25 Street, New York, NY 10010 Phone: (212) 353-8280 Fax:(212)353-8306

Attn: Mr. Bernard Orlan Received: 5/21/02 9:00:00 PM N.Y.C. Board of Education ATC Group#: 7827 28-11 Queens Plaza North Analysis Date: 5/21/02 Long Island City, NY 11101

Fax: (212) 475-4122 Phone: (212)477-8941

Project: NYC-BOE PS 234M Project#: 14584-1823

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area /Von Asbestos # Structures Sensitivity Concentration Sampin Volume Analyzed Asb Type(s) O.Sfi-S Sf, (S/cc) (S/mm^) (S/cc) /Votes

01 1928 00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 782 7 -I

. 02 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7827 -2

03 1936.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7827 -J

04 1928.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7827 -4

05 1936.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7827 -5

06 1928.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7327 -6

07 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7827 -7

MARK PEYSAKHOV MICHAEL A. GORYCKl, Ph.D.

Analyzed -- Approved by:

Disclaimer: The laboratory is not responsible for data reported in structures/cc, which is dependent on volume collected by non-laboratory personnel. This laoTs only responsible for data reported in structures/mml This report may not be reproduced, except in full, without written approval by ATC Associates Inc. This report may not be used to claim product endorsement by NYLAP or any other agency of the U.S. Government. This reports relates only to the samples reported above. Quality control data (including 95% confidence limits and laboratory and analysis' accuracy and precision) is available upon request.

Accredited for NVLAP PLM/TEM #101187-0, NY State ELAP #10879

Pai;e I uf 2

CONFIDENTIAL, CITY_21MC1OO_OO34O3538 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181750

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NYC-WTC_000181750Source: NYC Law Department, mirrored locally

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