NYC-WTC_000231011

NYC 9/11 Public Portal Document

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November 9,2001

Mr. Elliot Zuckerman Cushman & Wakefield . a/a/f Mercantile Exchange One North End Avenue New York, New York 10282

Ke; One North End Avenue Ambient Project # 211338

Deaf Mr, Zuckerman:

The following is a summary of the indoor environmental quality survey that Ambient Group, Inc. performed on'November 6, 2001 at the above referenced location. The survey included sampling for airborne metals, polynuclear aromatic hydrocarbons and airborne asbestos structures by TEM,

Four (4) air samples were collected from various locations on floors 3, 7. 12 and from outside the building and an^yzed by transmission electron mitrostopy (TEM) for asbestos structures. The results of the analysis indicated that airborne asbestos levels inside and outside the building at the time of testing were less than the analytical sensitivity of the instrument, which is well below the EPA standard of 70 structures/mm^ as well as other recommended industry guidelines and/or regulations.

Four (4) air samples were collected floors 3, 7, 12 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 KEL guidelines.

Four (4) air samples were collected from floors 3, 7,12 and outside the building and analyzed .&r metals in air. All measured meftals were within their respective OSHA Permissible Exposure Limits.

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NYC-WTC_000231011