ATC Associates Asbestos Fiber Analysis Report, June 2002

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: 6/16'02 4:00:00 PM N.Y.C, Board of Education ATC Group#: 8136 28-11 Queens Plaza North Analysis Date: 6/17/02 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) 0.S/i-S 5fi fS/cc) (S/mm^) (S/cc) Notes

03 1800.00 0.0450 0 None Detected 0 0 0.0048 <22.24 < 0.0048 SI36 -I

04 1808.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 8136 -2

05 1808.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 8136 -3

06 1816.00 0.0450 0 None Delected 0 0 0.0047 <22.24 <0.0047 8136 -4

07 1816.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 8136 -5

08 1824.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 SI36 -6

09 1808.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 8136 -7

MARK PEYSAKHOV MICHAEL A. GORYCKI, Ph.D.

Analyzed by ipproved by:

Disclaimer: The laboratory is not responsible for data reported in structures/cc, which is dependent on volume collected by non-labotatoiy 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 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 PLW^cM #101137-0, NY State ELAP #10879

Page 1 of 3

CONFIDENTIAL subject to protective order do. I, cert. NYC-WTC_000179768