Final air sample results, 55 Church Street, undated

NYC 9/11 Public Portal Document

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911L TESTWELL LABORATORIES, INC. Environmental Laboratory 47 Hudson Street, Ossining, New York 10562 NYS ELAP # 11142 NVLAP # 200083-0 AIHA A 100147

Transmission Electron Microscopy Results Client: Bovis Lend Lease - LMB 200 Park Avenue New York, New York Date Collected: 06/19/02 Date Rec'd (lab): 06/20/02 — • Sample Location: Millenium Hilton Hotel @ WTC Various Floors Analysis Date: 06/21/02 55 Church Street TEM Analyst: D. McCarl New York, New York Analytical Method: AHERA

Field Technician: B. Gitman

Filter Type: MCE 0.45 micron • vg.Grid Opening: 0.0121mm2

Lab Number Volume I Grid Grid Area Countable Asb. Concentration Concentration Sample #: Sample Location: Coll. Openings 02TEM # Analyzed Structures Structures/mm2 Structures/cc (liters) Opelyed

Inside Work Area 31st 181 3034 1280.0 6 0.073 1 13.77 0.004 Floor Inside Work Area 31st 182 3035 1280.0 ! 6 0.073 0 <13.77 <0.004 Floor Inside Work Area 31st 183 3036 1280.0 6 0.073 0 <13.77 <0.004 or Inside Work Area 31st 184 3037 1280.0 6 0.073 0 <13.77 <0.004 Floor Inside Work Area 31st 185 3038 1280.0 6 0.073 0 <13.77 <0.004 Floor

186 Blank 3039 0.0 6 0.073 0 <13.77 <0.004

a

187 Blank 3040 0.0 6 0.073 0 <13.77 <0.004

Structures/mm2 Structures/cc Total Average Concentrations <13.77 <0.004 This report is the confidential property of our cuents. i nis ceruncate of analysts.'report shall not be used by the client to claim product endorsement by the National Voluntary Laboratory Approval Program (NVLAP) or any agency of the United States Government. The laboratory has no control over air sampling collection. This certificate of analysis/report shall not be reproduced in full, without the written approval of Testwell Laboratories,

Inc.. f J

Laboratory Director/Approved Signatory

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NYC-WTC 000103649