NYC-WTC_000212755

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: 6/2/02 6:00:00 PM N.Y.C. Board of Education ATC Group#: 7939 28-11 Queens Plaza North Analysis Date: 6/2/02 Long Island City, NY 11101 Fax; (212)475-4122 Phone: (212)477-8941 Project: NYC-BOE PS 234M Project#: 14584-1823

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area Non Asbestos it Structures Sensitivity Concentration Sample folume Analyzed Asb Type(s) O.S/t-5 5/1 (S/cc) (S/mm^) (S/cc) Notes

01 1928.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7959 -I

02 1928.00 0 0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7959 -2

03 1928.00 0 0450 0 None Detected 0 0 0,0044 <22,24 < 0.0044 7939 -3

04 1920.00 0,0450 0 None Delected 0 0 0.0045 <22.24 < 0.0045 7939 -4

05 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 < 0.0045 7959 -5

06 1920.00 0 0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 79J9 -(S

07 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7939 -7

MARK PEYSAKHOV MICHAEL A. GORYCKI, Ph.D.

Analyzed by ^proved by:

Disclaimer: The laboratory is not responsible for data reported in structures/cc, which is dependent on volume collected by non-laboratory personnel. Ths Iwts only responsible tor 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 PLIWTEM #101187-0, NY State ELAP #10879

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NYC-WTC_000212755