Air sampling summary report, 400 Chambers Street, 2002

NYC 9/11 Public Portal Document

ATC Associates 104 East 25 Street, New York, NY 10010 Phone: (212) 353-8280 Fax. (212) 353-8306 (ATC Attn: Mr. Ben Sallemi Received: 11/20/01 8:00:00 AM ATC Associates Inc 104 East 25th Street ATC Group #: 5933 New York NY 10010 Analysis Date: 11/21/01' Fax: (212) 353-8306 Phone: (212) 353-8280 Project: Tribeca 400 Chambers Street , 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 Volume Analyzed Asb Type(s) 0.5p-5 5p (S/cc) (S/mm') (S/cc) Notes U 4 1300.00 0.0674 0 None Detected 0 0 0.0044 <14.83 <0.0044 1933 -1

1' 05 1300.00 0.0674 0 None Detected 0 0 0.0044 < 14.83 <0.0044 x')33 -2

1`06 1300.00 0.0674 0 None Detected 0 0 0.0044 < 14.83 <0.0044 "1033 -3

T.07 1300.00 0.0674 0 None Detected 0 0 < 14.83 0.0044 <0.0044 933 -4

T.08 1300.00 0.0674 0 None Detected 0 0 0.0044 < 14.83 <0.0044 1933 -5

109 1300.00 0.0674 0 None Detected 0 0 0.0044 < 14.83 <0.0044 133.6

f'•I0 1300.00 0.0674 0 None Detected 0 0 0.0044 <14.83 <0.0044 933 -7

ROMAN PEYSAKHOV MICHAEL A. GORYCKI, Ph.D. Analyzed by: Approved by:

0bdaimer: The laboratory is not responsible for data reported in structures/cc, which is dependent on volume collected by non-laboratory personnel. This lab is only responsible for data reported in structures/mm'. 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 PLW EM #101187-0, NY State ELAP #10879

NYC-WTC 000102807