NYC 9/11 Public Portal Document
10L Eat 25tH 'Dtre6t
New fork, Ncw York 10010
www.atc-envtro corn
!ATCASSOC I ATES I N C.
212.353.8280
Fax 212.353.8308
September 26, 2001
ALC Env i r -; it;lant -e l
L5 W. 30th :tzper_
.w - -.
&e''
Attn: Mr.
Re: Report of "EM Alysis
.ear Mr
(TEM)
eion electron microscopy
Ed lowing are the results of tra.ism
from our Group No. 5556:
ana.vsis of eleven PCM ai:c samie2
C1ieni n-4 -Mate
Avenue
Project Name: 345 and 355 Southend 7.Cu
and Apartments, Buildings 100
Location: Hallways
samples received in TM Lab: 09/26/01
document cj._ iata transmitted to you
These results will confirm and the
performed in strict conformance with
today. The analyses were Issue 2, August 15, 1994.
methodology of the NICSH method 7402,
examined at
of the samples were
Forty grid openings from each(approximately 1,000X and 10,000:{)
relatively low magnifications 0.25um
:n length and widths between
for structures greater than 5um -width ratio greater than . .1.
and 3ut:1, ar.d having a length-to by PCM
large enough to be observed
Theses structures would be structures were detected n
analysis. Asbestos and non -asbestos
proportions:
the samples in the following
cellulose fiber F/CC as
sample chrysotile gypsum
cr lass Asbestos
number
3 0.0% 93.8% 0.0% -6.2% 0.0
4 22.2% 77.8'% 0.0% 0 .0% 0.005
0.0% 23.1'% 0-0
0.0% 76.9%
5 0.0% 45.0% 0.0
6 0.0% 55.0's
9.5% 14.3% 0.0
8 0.0% 76.2%
77.3% 9.1% 13.6% 0.0
13 0.0% 0.0% 0 .0
14 0.0% 100.0% 0 .0% 0-0
100.0% 0.0% 0.0%
17 0.0% 27.7% 0.001
0.0%
18 3.65 68.7% 0.0
19 0.0% 66.7% 0.0% 33.3%
20 0.0% 42 .0% 0.0% 58.0% 0.0
NYC-WTC 000095487
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