NYC-WTC_000206447

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. Fabio Pedone Received: 7/16/02 11.00;00 AM WaiTen & Panzer Engineers , P.C. ATC Group#: 8511 228 E. 45th Street Analysis Date: 7/16/02 New York NY 10017 Fax: (212) 922-0630 Phone: (212)922-0077 Project: NYC DEP, W&P# 1079.01.02 86 1/2 Nassau Street, Roof

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

03 1560.00 0.0562 0 None Detected 0 0 0.0044 <17.79 <0.0044 85/1 -/

04 1560.00 0.0562 0 None Detected 0 0 0.0044 <17.79 <0.0044 851/ -2

05 1560.00 0.0562 0 None Detected 0 0 0.0044 <17.79 <0.0044 35// -3

06 1560,00 0.0562 0 None Detected 0 0 0.0044 <17.79 <0.0044 ,S3/I -4

in 1560.00 0.0562 0 None Detected 0 0 0.0044 <17.79 <0.0044 3.5 n -5

MARK PEYSAKHOV MICHAEL A. GORYCKI, Ph.D.

Analyzed by: Ajwoved by:

Disclaimer: The laboratory is not responsible for data reported in structures/cc, which is dependent on volume colle«ed by non-laboratory personnel. This lab is for data reported in structures/mmT 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 PLMAEM #101187-0, NY State ELAP #10379

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NYC-WTC_000206447