NYC-WTC_000231002

NYC 9/11 Public Portal Document I-.-.

N0V-2B-01 KON 02:43 PM AMBIENT GROUP INC FAX NO. 212 7B8 1540 P. 08

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November 26, 2001

Mr. Elliot Ackerman Cusltman & 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 preliminarj' summary of the indoor environmental qualily survey that Ambient Group, Inc. pcrfoiTned on November 20, 2001 at One North End Avenue. Summarized below are results for airborne metals, airborne silica and airborne asbestos strucklrcs by lUM.

Four (4) air samples were collected from various locations on floors 3, 6, 7 and 11 and analyzed by transmission electron microscopy (TEM) for asbestos structures. The results of the analysis indicated tiiat airborne asbestos levels at the time of testing were less than the analytical sensitivity of the jnstromcilt, , which is well below llic EPA standard of 70 structtirefi/mra^ as well ’as other r,0canifiiended industry guidelines and/or regulations.

Four (4) air samples were collected from floors 3, 6, 7 and II and analyzed for metals in air. A]! measured metals revealed levels well below their respective OSHA PEl^ and NIOSH RELs.

Four (4) air samples were collected from floors 3, 6, 7 and 11 and analyzed for silica in air. Silica levels were well below theNIOSH REL of 0.05 mg/mS.

Please refer to attached laboratoty data for further details. Should you have any questions regarding this, in formation, please feel free to call me.

Sincerely, Signed for An^ier.t Group, Ino. by:

JpHnJ. LehrvCf Vice-President

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11/26/01 MON 14-.52 [TX/RX NO 8S7g]oO44O CITY_21MC100_008874623

NYC-WTC_000231002