NYC-WTC_000224275

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: 4/21/02 5:00:00 PM N.Y.C. Board of Education ATC Group#: 7490 28-11 Queens Plaza North Analysis Date: 4/21/02 Long Island City, NY 11101 Fax: (212)475-4122 Phone: (212)477-8941 Project: NYC-BOE PS 234M Project#: 14584-1823 292 Greenwich St., 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 l^olume Analyzed Asb Typefs) O.Sft-S Sfi (S/cc) (S/mm^) (S/cc) Noles

03 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7490 -/

04 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7490 -2

05 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7490 -3

06 1920.00 0.0450 0 NoneDetected 0 0 0.0045 <22.24 <0.0045 7490 -4

07 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7490 -5

08 1928.00 0.0450 0 NoneDetected 0 0 0.0044 <22.24 <0.0044 7490 -6

09 1936.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7490 -7

MARKPEYSAKHOV MICHAEL A. GORYCKI, Ph.D.

Analyzed by: ApMoved by:

Disclaimer: The laboratory is not responsible for data reported in structures/cc, which is dependent on volume collectedby non-laboratory personnel. This lab isonly responsible 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 PLMZTEM #101187-0, NY State ELAP #10879

' Page I of 2

CITY_21MC1OO_OO2892896

NYC-WTC_000224275