Indoor environmental quality survey fax, Dec 19, 2001

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ambient group Inc. NATIONAL HEADQUARTERS

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December 19, 2001

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 December 13, 2001 at One North End Avenue. The survey included sampling for airborne metals (including silica scan), polynuelear aromatic hydrocarbons and airborne asbestos structures by TEM.

Four (4) air samples were collected from floors 3, 7, 13 and outside the building 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 inside and outside the building were less than the analytical sensitivity of the instrument, which is well below the EPA standard of 70 structures/mm2 as well as other recommended industry guidelines and/or regulations.

Four (4) air samples were collected from floors 3, 7, 13 and outside the building 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/r» .

Four (4) air samples .were collected from floors 3, 7, 13 and outside the building 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 Ambient Group, Inc. by:

John J. Leitner p,.//g/it Vice President

nInt AttEOhmenre GLEN COVE, NY EeAi c. FL CHICAGO, IL CORONA, Ca 516 6o9-Done 105 860-0101 312 527_552.6 909 =72-4730 211338

12/19/01 WED 12:08 [TX/RI NO 8851]

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