Subject TriDCCS Towers
105 Duane Street
Re: Ambient Air Sampiii g
To: Peter Hoyle
Related Managwpt
From: Fred Burkhardt , ,-
Date: December 13, 20QX. .
On December 12.2001, at the rat of and witnessed by the NYCDEP, ATC collected a total
collected from the
of ten ambient air sample from within Tribeca Tower. Five Samples were front of the supply air
common hallway of the tenth floor, with one sample placed directly in
second floor air
entry point. A second seat of five amt~i*rtt air samples were collected from the
handier room servicing the common areas Including the tenth floor.
selected as a criteria for acceptable
In the abbsence of a specify slrriblent. ~iir standard, ATC hasrequirement
ambient air sample seta, the AHERA re-occupancy following an asbestos
abatement action of an average of We than 70 asbestos structures per square millimeterIs(<70 th
sthrm2) per sample set This ortteris;has been selected because the AHERA been des~i®nedt to be
most stringent airborne asbestos rec cu[~cY standard available, and has
protective of children following an asbestos abatement project.
detected
Sased upon analytical sample results for all samples recording no asbestos structures
opinion that the
which Is s lg iificantiy below the AHER clearance requirement. It is ATC's
ambient air samples collected from to areas are representative of the ambient conditions at
an acceptable Criterion for re-occupancy. If
the time of testing and that the arms tested meet
you have any questions or require additional explalnation of the information presented please
do not hesitate to call meat 212-3834280.
Thank You. f
L
i
SPA
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NYC-WTC 000125993
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NYC-WTC_000125993Source: NYC Law Department, mirrored locally