Air sample results for 55 Church Street, undated

NYC 9/11 Public Portal Document

• LL TESTWELL LABORATORIES, INC. Environmental Laboratory 4- NYS FLAP # 11142 9'I 47 Hudson Street, Ossining, Nei ~k 10562 NvLAP # 2000e3-0 AIHA # 100147

Transmission Electron Microscopy Results • Client: Bovis Lend Lease Project #: MSO-025AB 200 Park Avenue New York, New York Date Collected: 12/05/01 Date Rec'd (lab): 12/05/01 Sample Location: The Millenium Hilton Hotel Analysis Date: 12/06/01 55 Church Street -- TEM Analyst: D. McCarl New York, New York Analytical Method: AHERA • 3rd Floor - 195 Broadway Lobby & Corridor EPA 40 CFR Part 763 Field Technician: T. Chhetry

Filter Type - MCE 0.45 micron Avg.Grid Opening: 0.0121mm2

Grid Lab Number Volume Coll. Grid Area Countable Asb. Concentration Concentration Sample #: Sample Location: Openings 01TEM # (liters) Analyzed Structures Structuresimm° Structures/cc Analyzed

1A 3rd Floor 195 Elevator Lobby 4459 1280.., 6 0.073 4 55.10 0.017

2A 3rd Floor 195 Corridor 4460 1280.0 6 0.073 0 <13.77 <0.004

3A 3rd Floor Office Area 4461 1280.0 6 0.073 3 41.32 0.012

4A 3rd Floor Office Area 4462 1280.0 6 0.073 0 <13.77 <0.004

5A Field ?:dnk 4463 0.0 6 0.073 0 <13.77 <0.004

6A Field Blank 4464 0.0 6 0.073 0 <13.77 <0.004

Structures/mm2 Structures/cc Total Average Concentrations N/A N/A

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. Copypoht O 2001 Testwell Laboratories. Inc.

NYC-WTC 000104024