Final air sample results, 55 Church Street, undated

NYC 9/11 Public Portal Document

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• L TESTWELL LABORATORIES, INC. Environmental Laboratory 47 Hudson Street, Ossining, New York 10562 NYS ELAP # 11142 iwLAP # 2000e3-o AIHA # 100147

Transmission Electron Microscopy Results Client: Bovis Lend Lease - LMB 200 Park Avenue New York, New York Date Collected: 08/12/02 _ Date Rec'd (lab): 08/13/02 — Sample Location: Millenium Hilton Hotel @ WTC Various Floors Analysis Date: 08/14/02 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 Volume Grid Lab Number Grid Area Countable Asb. Concentration= Concentration Sample #: Sample Location: Coll. Openings 02TEM # (liters) Analyzed Analyzed Structures Structures/mm Structures/cc

360 Inside Work Area 6399 1280.0 6 0.073 0 <13.77 <0.004

361 Inside Work Area 6400 1280.0 6 0.073 0 <13.77 <0.004

362 Inside Work Area 6401 1280.0 6 0.073 0 13.77 0.004

363 Inside Work Area 6402 1280.0 6 0.073 0 <13.77 <0.004

364 Inside Work Area 6403 1280.0 6 0.073 0 <13.77 <0.004

365 Blank 6404 0.0 6 0.073 0 <13.77 <0.004

366 Blank 6405 0.0 6 0.073 0 <13.77 <0.004 Structures/mm 2 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 oy the rvauonai 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. _ a

Laboratory Director/Approved Signatory

NYC-WTC 000103688