NYC-WTC_000189348

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 4/18/02 9 30 00 PM NYC Board of Education ATC Group # 7459 28 11 Queens Plaza North Analysis Date 4/18/02 Long Island City NY 11101 Fax (212)475 4122 Phone (212)477 8941 Project H S for Leadership & Public Service

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area Non Asbestos tt Structures Sensitivity Concentration Sample I'oliime Analyzed Asb Type(s) OSpS Sp (S/cc) (S/mm^) (S/cc) Notes

04 1824 00 0 0450 0 NoneDetected 0 0 00047 <22 24 <0 0047 7459 I

05 181600 0 0450 0 NoneDetected 0 0 0 0047 <22 24 < 0 0047 7459 2

06 1808 00 0 0450 0 NoneDetected 0 0 0 0047 <22 24 <0 0047 7459 3

07 1816 00 0 0450 0 NoneDetected 0 0 0 0047 <22 24 <0 0047 7459 4

08 1824 00 0 0450 0 NoneDetected 0 0 0 0047 <22 24 <0 0047 7459 5

09 1824 00 0 0450 0 NoneDetected 0 0 0 0047 <22 24 <0 0047 7459 6

10 1816 00 0 0450 0 NoneDetected 0 0 0 0047 <22 24 <0 0047 7459 7

MARK PEYSAKHOV MICHAEL A GORYCKI Ph D

Analyzed by Approved by

Disclaimer The laboratory is not responsible (or data reported in structures/cc which is dependent on volume collected by non laboratory personnel This la^Wnly responsible for data reported in structures/mm This report may not be reproduced except in full without wntten 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 PLMZTEM #101187-0 NY State ELAP #10879

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NYC-WTC_000189348