NYC-WTC_000204740

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: 4/9/02 9:00:00 PM N.Y.C. Board of Education ATC Group #: 7363 28-11 Queens Plaza North Analysis Date: 4/9/02 Long Island City, NY 11101 Fax: (212) 475-4122 Phone: (212)477-8941 Project: NYC-BOE PS I50M Project#: 14584-0824

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 V'oiume Analyzed Asb Type(s) O.Sfi-S Sfi (S/cc) (S/mm’) (S/cc) Notes

01 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 75(55 -I

02 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7363 -2

03 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7363 -3

04 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 7565 -4

05 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 736} -5

06 1928.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7363 -6

07 1936.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 7363 -7

MARK PEYSAKHOV 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-laboratoiy personnel. This lab isWy responsible for data reported in structures/mmf 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 PLM/TEM #101187-0, NY Slate ELAP #10879

Pape / of I

CITY_21MC100_003061833

NYC-WTC_000204740