NYC-WTC_000217909

NYC 9/11 Public Portal Document

ATC Associates 104 East 25 Street, New York, 10010 Phone: (212) 353-8280 Fax; (212) 353-8306

Attn; Mr. Bernard Orlan Received: 2.-13/02 8:10:00 PM N.Y.C. Board of Education 28-11 Queens Plaza North ATC Group #: 6671 Long Island City, NY 11101 Analysts Date: 2/14/02 Fax: (212) 475-4122 Phone: (212) 477-8941 Project: NYC-BOE PS 234M Project#: 14584-1823

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area Non ^^bestos Structures Sensitivity Concentration Sample Colume Analyzed Asb Type(s) 0.5y-5 5u (S/cc) fS/inm-) (S/cc) /Votes 01 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 6671 -1

02 1936.00 0.0450 0 None Delected 0 0 0.0044 <22.24 <0.0044 6671 -2

03 1944.00 0.0450- 0 None Detected 0 0 0.0044 24 <0.0044 6671 -3

04 2000.00 0.0450 0 None Detected 0 0 0.0043 <22.24 <0.0043 6671 -4

05 1944.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 6671 -5

06 1944.00 0.0450 0 None Detected 0 0 0.0044 <22.24 <0.0044 6671 -6

07 1944.00 0.0450 0 None Detected 0 0 0.0044 <0.0044 6671

08 1920.00 0.0450 0 None Detected 0 0 0.0045 <22.24 <0.0045 6671 -8

MARK PEYSAKHOV .MICHAEL A. GORYCKI, Ph.D.

Analyzed by: Approved by

Disclaimer: The laboratoiy is not responsible far data reported in structures/cc, which is dependent on volume collectetiby non-laboratory personnel This lab is ony -espoi far data reported in structures/mmL This report may not be reproduced, except in full, without written approval by ATC Associates me. This report may not be jseo 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 lircludinc 95“.= confidence limits and laboratory and analysis' accuracy and precision) is available upon request.

Accredited forNVLAP PlMfrEMSIOIIS’-C. NY State ELAP #10879

CITY_21MC100_002878052

NYC-WTC_000217909