Final air sample results, 55 Church Street, undated

NYC 9/11 Public Portal Document

L 91IJ TESTWELL LABORATORIES, INC. Environmental Laboratory NYS ELAP A 11142 47 Hudson Street, Ossining, New York 10562 NVLAP * 200083-0 AIM 0 100147

Transmission Electron Microscopy Results •

Client: Bovis Lend Lease - LMB 200 Park Avenue New York, New York Date Collected: 06/14/02 - Date Rec'd (lab): 06/16/02 Sample Location: Millenium Hilton Hotel @ WTC Various Floors Analysis Date: 06/19/02 — • 55 Church Street TEM Analyst: D. McCarl New York, New York Analytical Method: AHERA Field Technician: T. Chhetry / 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 # Analyzed Structures Structures/mm2 Structures/cc (liters) Analyzed

Inside Work Area 34th 164 2932 1280.0 6 0.073 0 <13.77 <0.004 Floor 0. Inside Work Area 34th 165 2933 1280.0 6 0.073 0 <13.77 <0.004 Floor Inside Work Area 34th 166 2934 1280.0 6 0.073 0 <13.77 <0.004 Floor Inside Work Area 34th 167 2935 1280.0 6 0.073 0 <13.77 <0.004 Floor Inside Work Area 34th 168 2936 1280.0 6 0.073 0 <13.77 <0.004 Floor

169 Field Blank 2937 0.0 6 0.073 0 <13.77 <0.004

• 170 Field Blank 2938 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 analysislreport 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 000103645