NYC-WTC_000204181

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: 4/3/02 5:50:00 PM N.Y.C. Board of Education ATC Group#: 7317 28-11 Queens Plaza North Analysis Date: 4/3/02 Long Island City, NY 11101 Fax: (212)475-4122 Phone: (212)477-8941 Project: NYC BOE H.S. For Leadership & Public Services

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Xrea Non Asbestos # Structures Sensitivity Concentration Sample Volume Analyzed Asb Type(s) O.S/t-S 5fl (S/cc) (S/mm') (S/cc) Notes

04 1824.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7317 -I

05 1862.00 0.0450 0 None Detected 0 0 0.0046 <22.24 <0.0046 73.17 -2

06 1824.00 0.0450 0 None Detected 0 0 0.0047 <22.24 < 0.0047 7317 -3

07 1816.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7317 -4

08 1808.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 73/7 -5

09 1816.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7317 -6

10 1808.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7317 -7

MICHAEL A. GORYCKI, Ph.D. MARK PEYSAKHOV Analyzed Amroved ty;

Disclaimer The laboratory is not responsible for data reported in structuresfcc, 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 claim product endorsement by NVLAP or any other agency of the U.S. Government. This reiiorts 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 FLM~EW #101187-0, NY State ELAP #10879

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NYC-WTC_000204181