Final air sample results, 55 Church Street, undated

NYC 9/11 Public Portal Document

TESTWELL LABORATORIES, INC. • 11Li: Environmental Laboratory 47 Hudson Street, Ossining, New York 10562 NYS ELAP S 11142 NV P s 200083.0 AIHA S 100147

i Transmission Electron Microscopy Results client: Bovis Lend Lease - LMB 200 Park Avenue New York, New York _ _ Date Collected: 05/29/02 • Date Recd (lab): 05/30/02 Sample Location: Millenium Hilton Hotel @ WTC Various Floors Analysis Date: 06/03/02 55 Church Street TEM Analyst. D. McCarl • New York, New York Analytical Method: AHERA Field Technician: T. Chhetry

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

Sample #: Sample Location: I Lab Number Volume Call. • Grid Openings Grid Area Countable Asb. Concentration Concentration 02TEM # (liters) Analyzed Structures Structures/mm Structures/cc Analyzed =1 Inside Work Area 85 2623 1280.0 6 0.073 0 <13.77 <0.004 44th Floor Inside Work Area 86. 2624 1280.0 6 0.073 0 <13.77 <0.004 44th Floor Inside Work Area <0.004 87 2625 1280.0 6 0.073 0 <13.77 44th Floor

88 Field Blank 2626 0.0 6 0.073 0 <13.77 <0.004

89 Field Blank 2627 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 clients. This certificate of analysis/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.

Laboratory Director/Approved Signatory a

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NYC-WTC 000103624