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Indoor environmental quality survey fax, Feb 5, 2002

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Fax cover sheet from Ambient Group dated February 5, 2002 regarding indoor environmental quality surveys.

NYC-WTC_000097570–000097580

Folder label: “1 NORTH END AVENUE Block: 16 Lot: 225 BIN: 1085502 4 River Terrace, 60 Vesey Street

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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 er `

" E

Vice President

7Vnt 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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NYC-WTC_000097570Source: NYC Law Department, mirrored locally

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