NYC 9/11 Public Portal Document
02'/:.5/2002 10:44 FAX 2129444618 AMBIENT GROUP 4 002
NATIONAL HEADQUARTERS
ambient group inc.
Indoor environmental quality surveys 55 WET 390 sZEEET
[2T FLOOR
Water treatment consulting
NEW YORK, NEW YDRX 10078
Asbestos & Lead field services
TEL (zrz) 94,4-4675
Regulatory compliance progtams PAZ: (zit) 944- 4618
Air, water & soil analytical laboratories WETS. WWW. ,LEXENTGROUP.COM
February 5, 2002
Mr. Elliot Zuckerman
Cushman & Wakefield
a/a/f Mercantile Exchange
One North End Avenue
New York, New York 10282
Re: One North End Avenue
Ambient Project # 211338
Dear Mr. Zuckerman:
The following is a summary of the indoor environmental quality survey that Ambient Group, Inc.
performed on January 31, 2002 at One North End Avenue. The survey included sampling for airborne
metals (including silica scan), polynuclear aromatic hydrocarbons and airborne asbestos structures by
TEM.
Four (4) air samples were collected from floors 3, 7, 10 and 13 and analyzed by transmission electron
microscopy (TEM) for asbestos structures. The results of the analysis indicated that airborne asbestos
levels at the time of testing were less than the analytical sensitivity of the instrument, which is well below
the EPA standard of 70 structures/mmZ as well as other recommended industry guidelines and/or
regulations.
Four (4) air samples were collected from floors 3, 7, 10 and 13 and analyzed for metals in air (including
silica). All measured metals revealed levels well below their respective OSHA PELs and NIOSH RELs.
Levels of cristobalite and quartz detected in the silica scan were also below the NIOSH REL of 0.05
mg/m3.
Four (4) air samples were collected from floors 3, 7, 10 and 13 and analyzed for polynuclear aromatic
hydrocarbons in air. Analysis of all four (4) samples collected revealed that the levels of the individual
compounds were below the OSHA Permissible Exposure Limits and NIOSH REL guidelines.
Please refer to the attached laboratory data sheets for further details. Should you have any questions
regarding this information, please feel free to call me.
Sincerely,
Signed for
. w
Group, Inc. by:
John J. Leitner
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Vice President
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Attachments
GLEN COVE. NY MIAMI, PL CHICAGO, I. CORONA, CA
516 609-0009 305 860-0101 312 527-5526 909 272-4730
211338
02/05/02 TUE 11:41 [TX/RI NO 9215]
NYC-WTC 000097570
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