NYC-WTC_000213892

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: 6/11/02 9:00:00 PM N.Y.C. Board of Education ATC Group#: 8055 28-11 Queens Plaza North Analysis Date: 6/11/02 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 Non Asbestos # Structures Sensitivity Concentration Sample Volume Analyzed Asb Type(s) O.Sft-5 Sf, fS/cc) (S/mm>) (S/cc) Notes

03 1816.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 8055 -/

04 1816.00 0.0450 0 , NoneDetected 0 0 0.0047 <22.24 <0.0047 8055 -2

05 1824.00 0.0450 0 NoneDetected 0 0 0.0047 <22.24 <0.0047 8055 -3

06 1824.00 0.0450 0 NoneDetected 0 0 0.0047 <22.24 <0.0047 St)55 -4

07 1832.00 0.0450 0 NoneDetected 0 0 0.0047 <22.24 <0.0047 8035 -5

08 1848.00 0.0450 0 None Detected 0 0 0.0046 <22.24 <0.0046 S05S -6

09 1832.00 0.0450 0 NoneDetected 0 0 0.0047 <22.24 <0.0047 8055 -7

MARKPEYSAKHOV MICHAEL A. GORYCKI, Ph.D.

Analyzed by: 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 lab is only responsible for data reported in structures/mm*. This report may not be reproduced, except in full, without written approval by ATC Associates Inc. This report may not be used to daim product endorsement by NVLAP 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

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NYC-WTC_000213892