PCM air sample results chain of custody, 200 Park Avenue

NYC 9/11 Public Portal Document

LL TESTWELL LABORATORIES, INC. Environmental Laboratory 47 Hudson Street, Ossining, New York 10562

~- NYS ELAP 0 11142

NVLAP 0 200083-0 AIHA 0 100147

PCM AIR SAMPLE RESULTS Client: Bovis Lend Lease Date Collected: 05/21/02 Date Rec'd (lab): 05/22/02 Project #: MBO-025AB Analysis Date: 05/22/02 Analyst: A. Sokol 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 Location: Sample Concentration 02PCM Volume Type f/cc

Outside Work Area Clean Room of During 13988 1200 <0.0023 209 Personal Decon Outside Work Area Remote Waste During 13989 1200 <0.0023 210 Decon Outside Work Area 56th Floor Inside During 13990 1200 0.0043 211 Airlock Outside Work Area 56th 212 Floor During 13991 1200 <0.0023 Freight Elevator Lobby Outside Work Area 50th Floor Inside During 13992 1200 0.0033 213 Airlock Outside Work Area 50th 214 Floor During 13993 1200 0.0027 Freight Elevator Lobby Outside Work Area 49th Floor Inside During 13994 1200 <0.0023 215 Airlock Outside Work Area 49th 216 Floor During 13995 1200 0.0033 Freight Elevator Lobby Outside Work Area 48th Floor Inside During 13996 1200 0.0031 217 Airlock Outside Work Area 48th Floor During 13997 1200 0.0025 218 Freight Elevator Lobby Outside Work Area 47th Floor Inside During 13998 1200 <0.0023 219 Airlock Outside Work Area 47th Floor During 13999 1200 0.0025 220 Freight Elevator Lobby - umrt or quanntanon oases 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 McCari - Laboratory Director

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