NYC-WTC_000212234

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: 4/20/02 5:00:00 PM N.Y.C. Board of Education ATCGroup#: 7480 28-11 Queens Plaza North Analysis Date: 4/20/02 Long Island City, NY 11101 Fax: (212)475-4122 Phone: (212) 477-8941 Project: H.S. for Leadership & Public Service 90 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 It Structures Sensitivity Concentration^ Sample i^olume Analyzed Asb Type(s) 0.Sp-S Sp fS/cc) fS/mm^) (S/cc) Notes

03 . 1800.00 0.0450 0 None Detected 0 0 .0.0048 < 22.24 <0,0048 ■7480 -I.

. 1800.00 0.0450 0 None Detected 0 0 0.0048 < 22.24 <0.0048 7480 -2

05 1800.00 0.0450 0 None Detected 0 0 0.0048 <22.24 < 0.0048 7480 -3

06 1800.00 0.0450 0 None Detected 0 0 0.0048 <22.24 <0.0048 7480 -4

08 1800.00 0.0450 • 0 None Detected 0 0 0.0048 . <22.24 <0.0048 7480 -6

09 1800.00 0.0450 0 None Detected 0 0 0.0048 <22.24 <0.0048 7480.-7

ROMAN PEYSAKHOy ’ MICHAEL A. GORYCKI, Ph.D.

Analyzed by: Approved by:

Disclaimer: The laboratory is not responsible for data reported in structures/cc. which is dependent on volume collected by non-laboratory personnel. ThisWis only responsible for data reported in stnictures/mmA 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 th.e 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 PLM/TEM #101187-0, NY State ELAP #10379

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NYC-WTC_000212234