Final air sample results, 55 Church Street, undated

NYC 9/11 Public Portal Document

L 911J 1 TESTWELL LABORATORIES, INC. Environmental Laboratory NYS ELAP 4 11142 47 Hudson Street, Ossining, New York 10562 NVLAP 0 200083-0 AIHA 0 100147

Transmission Electron Microscopy Results •

Client: Bovis Lend Lease - LMB • 200 Park Avenue New York, New York Date Collected: 06/03/02 Date Rec'd (lab): 06/04/02 • Sample Location: Millenium Hilton Hotel @ WTC Various Floors Analysis Date: 06/05/02 55 Church Street TEM Analyst: D. McCarl New York, New York Analytical Method: ANERA Field Technician: B. Gitman _ Filter Type: MCE 0.45 micron • vg.Grid Opening: 0.0121mm2

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

Inside Work Area 2731 ,280.0 6 0.073 0 <13.77 <0.004 100 43rd Floor S Inside Work Area 101 2732 1280.0 6 0.073 0 <13.77 <0.004 43rd Floor Inside Work Area 102 2733 1280.0 6 0.073 0 <13.77 <0.004 43rd Floor Inside Work Area 103 - 2734 1280.0 6 0.073 0 <13.77 <0.004 43rd Floor Inside Work Area 104 2735 1280.0 6 0.073 0 <13.77 <0.004 43rd Floor

105 Blank 2736 0.0 6 0.073 0 <13.77 <0.004

106 Blank 2737 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 analysistreport 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