NYC-WTC_000228974

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 Orian Received; 5/19/02 6;00;00 PM N.Y.C. Board of Education ATC Group#: 7797 28-11 Queens Plaza North Analysis Date: 5/19/02 Long Island City, NY 11101 Fax: (212) 475-4122 Phone: (212)477 8941 Project: H.S. Of Economics And Finance

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area Nou Asbestos Il Structayes Sensitivity Concentration Sample i/olume Analyzed Asb Type(s) 0.5fi~S Sfi (S/cc) (S7mni^) (S/cc) Notes

01 1920.00 0-0450 0 Nona Delected 0 0 0.0045 <22.24 <0.0045 7797 -I

02 ! 020.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7797 -2

03 2040.00 0.0450 0 None Detected 0 0 0.0042 <22-24 <0.0042 7797

04 1944.00 0.0450 0 None Detected 0 0 0.0044 ;22.24 <0.0044 7797 -4

05 1928,00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 779,'" -J

06 1928.00 0.0450 0 Nona Detected 0 0 0.0044 <22.24 <0.0044 7797 -6

07 2173.00 0.0450 0 None Detected 0 0 0.0039 <22.24 <0,0039 7r<)7 .7

MICHAEL A GORVCKi, Ph.D. MARK PEYSAKHOV

Analyzed by; Approved by:

Disdaimer: The (atwratory is not respenswie far data reported in structures/cc, ivtiicn is dependent on wiume ceflected by non-iabcratory personnel. oniy responsible lor data reported in struciures/mm/ This report may not be reproduced, except in full, without written approval by ATC Associates Inc, This report may not be used to claim proouc! endoisement by MVLAP 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 PLWTEM #101187-0, NY State ELAP #10879

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CITY_21MC100_002901991

NYC-WTC_000228974