PCM air sample results chain of custody, 200 Park Avenue

NYC 9/11 Public Portal Document

TESTWELL LABORATORIES, INC. Environmental Laboratory NYs E1AP 411142 47 Hudson Street, Ossining, New York 10562 NVLAP a 200083-0 AIHA 4 100147 I— PCM AIR SAMPLE RESULTS Client: Bovis Lend Lease Date Collected: 05/23/02 Date Rec'd (lab): 05/24/02 Project #: MBO-025AB Analysis Date: 05/24/02 Analyst: D. McCar/ Sample Location Millenium Hilton @ WTC 55 Chruch Street Analytical Method: NIOSH 7400 New York, New York Various Floors Sample Condition Acceptable? YES Field Technician T. Chhetry

Sample #: Sample — Concentration Sample Location: 02PCM Volume Type f/cc

Outside Work Area Clean Room of During 14235 1200 <0.0023 267 Remote Personal Decon Outside Work Area Remote Waste During 14236 1200 <0.0023 268 Decon Outside Work Area 56th Floor Inside During 14237 1200 0.0041 269 Airlock Outside Work Area 56th 270 Floor During 14238 1200 0.0076 Freight Elevator Lobby Outside Work Area 49th Floor Inside During 14239 1200 0.0037 271 Airlock Outside Work Area 49th Fl 272 oor During 14240 1200 <0.0023 Freight Elevator Lobby Outside Work Area 48th Floor Inside 273 During 14241 1200 0.0065 Airlock Outside Work Area 48th Fl 274 oor During 14242 1200 0.0051 Freight Elevator Lobby Outside Work Area 47th Floor Inside 275 Airlock During 14243 1200 0.0061 Outside Work Area 47th Fl 276 oor During 14244 1200 0.0041 Freight Elevator Lobby Outside Work Area 46th Floor Inside During 14245 1200 0.0065 277 Airlock Outside Work Area 46th 278 Floor During 14246 1200 0.0090 Freight Elevator Lobby - Limit of quantitation based on volume of air collected and 5.5 f/100 fields as per the NIOSH 7400 method. The report value is calculated by using the higher value of either the actual concentration or the limit of quantification reported at P(0.05) Indicating the 95% confidence level at 2 standard deviations. " Sample information is provided by the client & presented as stated. "' Laboratory QC data available upon request "" The laboratory has no control over air sampling collection. Reports are 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 This certificate of analysis/report shall not be reproduced except in full, without the written approval of Testwell Laboratories, Inc.

Deborah McCart - Laboratory Director

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