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 EIAP # 11142 NVLAP # 200083-0 AIHA # 100147

Transmission Electron Microscopy Results Client: Bovis Lend Lease - LMB 200 Park Avenue New York, New York Date Collected: 08/08/02 _ Date Rec'd (lab): 08/09/02 • Sample Location: Millenium Hilton Hotel @ WTC Various Floors Analysis Date: 08/12/02 55 Church Street TEM Analyst: D. McCar/ 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 Structures Structures/mm2 Structures/cc Apelyed

56th Floor Inside Work 348 6191 1280.0 6 0.073 0 <13.77 <0.004 Area 56th Floor Inside Work 349 6192 1280.0 6 0.073 0 <13.77 <0.004 Area 56th Floo Inside Work 350 6193 1280.0 6 0.073 2 27.55 0.008 56th Floor Inside Work 351 6194 1280.0 6 0.073 0 <13.77 <0.004 1S 352 56th Floor Inside Work Ar 6195 1280.0 I 6 0.073 0 <13.77 <0.004 33rd Floor Inside 6196 ,280.0 6 0.073 0 <13.77 <0.004 353 Work Area

• 354 33rd Floor Inside Work Area 6197 1280.0 I 6 0.073 0 <13.77 <0.004 Structures/mm 2 Structures/cc Total Average Concentrations 15.74 0.005 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

NYC-WTC 000103685