NYC-WTC_000196932

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: 3/2/02 6:30:00 PM N.Y.C. Board of Education ATC Group#: 6898 28-11 Queens Plaza North Analysis Date: 3/3/02 Long Island City, NY 11101 Fax: (212) 475-4122 Phone: (212)477-8941 Project: H.S. Of Economics And Finance 100 Trinity Place, New York, NY

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area Non Asbestos b Structures Sensitivity Concentration Sample Coliinie Analyzed Ash Type(s) 0.5fl-5 5fl (S/cc) (S/mm-) (S/cc) Notes

03 1824.00 0.0450 0 None Defected 0 0 0.0047 <22.24 <0.0047 6898-1

04 1816.00 0.0450 0 None Delected 0 0 0.0047 <22.24 <0.0047 6898 -2

05 1824.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 6898 -3

06 1826.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 6898 -4

07 1824.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 6898 -5

08 1824 00 0 0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 6898 -6

09 1824.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 6898-7

10 1816.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 6898-8

ROMAN PEYSAKHOV MICHAEL A. GORYCKl, Ph.D.

Analyzed by: ^proved by:

Disclaimer: The laboratory is not responsible for data reported in structures/cc. wnich is dependent on volume collected by non-laboratory personnel. This lab is 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 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, NV State ELAP #10879

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NYC-WTC_000196932