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Background sampling chain of custody, 250 Broadway, Sept 2001

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Chain of custody documentation for background sampling including asbestos and lead at 250 Broadway in September 2001.

NYC-WTC_000106077–000106100

Folder label: “250 BROADWAY; Block: 124 Lot: 24 BIN: 1001408 245 Broadway, 2-4 Murray St. 1-7 Park Pl, 239- 247 Broadway

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NYC 9/11 Public Portal Document

10/01/2001 10:43 FAX 212 353 8308 ATC - 171018/020

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010

N.Y.C. Housing Authority Approved N.Y. State ELAP #10879 250 Broadway, 16th Floor ACCREDITED NVLAP Lab Code # 3.187 New York, NY 10007 Report Date: 09/16/01

ASBESTOS-FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fibor Idcatitieation by 8o1ected-Area Electron Ditfrantion (S m) and Energy-Dispersive X-RAY spectroscopy (ED$) Hathods ).4BRA Final Rule, EPA Federal Register (40 CFR, Pnrt 7631, Vol. 52, No. 210, October 30, 1987

samolo Idan i£i at on Analvsii Parameters

Project/Site: 250 Rroadway. NY. ST TEM Sample No. a $512 - 59085 floors 31,_27. 19. 9 Date Rccoiveds 09 1 01 Grid Openings Analysods4

Project Sample No.; ytl Average Grid Openings 106.00 um

Air Volume: 1800 liters Total Area y 4 5Q mm2

Filter Types MCE 25 mm diam., Pore Sizes 0.45 um Analytical Sensitivity: 22.2 a1an2 Effective Area: 385 mma 0.0048 C/cc

------------------------------------------- --------------------------------------------------------------------------------- FIBROUS _ 1 2TICULATES ANALYZED Number observed CONCENTRATION Total single Matrix Total. st::uct. Filter Air Fibers Bundles clusters 3trVOt. StruCt. a-5um Strsct/n2 Struet/cc nam/m3

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0300 0

Ampbibola Asbestos 0 0 0 0 0 C 0.0 0.0000 0

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total aaboctoc (includes ambiguous structures) 0 0 0.0 0.0000 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A No identification 0 0 0 0 0 0 0.0 0.0000 N/A

Totalo (All Structures) 0 0 0.0 0.0000 N/A The estimated uncertainty of this analysis is 1 standard deviation. --------------------------------------------------------------------------------------------------------------------------- Non-asbestos fiber i.d. (EOS/SAED): None detected Amphibole Asbestos Type: None detected --------------------------------------------------------------------------------

-- --------------------

The Analysis was carried out in accordance with the approved TEM method. ---------------------

This laboratory is in compliance with the quality specified for the meths

Analyzed by: Report Reviewed by:

Roman Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

NYC-WTC 000106090

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NYC-WTC_000106090Source: NYC Law Department, mirrored locally

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