NYC-WTC_000227280

NYC 9/11 Public Portal Document

ATC Associates 104 East 25 Street, New York, NY 10010 Phone: (212) 353-8280 Fax: (212) 353-8306 TC Attn: Mr. Bernard Orlan Received: 3/13/02 8:45:00 PM N.Y.C. Board of Education ATC Group#: 7061 28-11 Queens Plaza North Analysis Date: 3/13/02 Long Island City, NY IIIOI 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 # Structures Sensitivity Concentration Sample Volume Analyzed Asb Type(s) O.Sft-S S/i fS/cc) (S/mm^) (S/cc) Notes

03 1840.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7061 -1

04 1840.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7061 -2

05 1848.00 0.0450 0 None Detected 0 0 0.0046 <22.24 <0.0046 7061 -3

06 1832.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7061 -4

07 1832.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7061 -5

08 1840.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7061 -6

09 1840.00 0.0450 0 None Detected 0 0 0.0047 <22.24 <0.0047 7061 -7

ROMAN PEYSA^HOV MICHAEL A. GORYCKl, Ph.D.

Analyzed by:

Disclaimer The laboratory is not responsible for data reported in structures/cc, which is dependent on volume collected by non-laboratory personnel. This lab is only responsible for data reported in structuresmim' 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.

Aaredited for NVLAP PLMfTEM #101187-0, NY Slate ELAP #10879

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