NYC 9/11 Public Portal Document
104 East 25th Street
New York. New York 10010
www.atc-env ro.cOm
212.353 8280
Fax 212 353.8306
ASSOC IATF S I NC.
October 8, 2001
ALC Environmental
115 W. 30th Street
New York, NY 10001
Attn: Mr. Joshua Sarett
Re: Report of TEM Analysis
Dear Mr. Sarett:
microscopy (TEM)
Following are the results of transmiss..on electron
samples from our Group No. 5635:
analysis of tour PCM air
Client: Mid -State
Project Name: 385 South End Ave., Bldg. 500
Location: Various Apts.
Samples received: 10/08/01
transmitted to you
These results will confirm and document the data
conformance with the
today. The analyses were performed in strict 1994.
methodology of the NIOSH method 7402, Issue 2, August 15,
examined at
Forty grid openings from each of the samples were
(approximately "i,000X and 10,000X;
relatively low magnifications
Sum in length and widths between 0.25um
for structures greater than 3:1.
than
and Sum, and having a length -to-width ratio greater by PC4
to be observed
These structures would be large enough
analysis.
in the samples in the
Only non -asbestos structures were detected
following proportions:
gypsum cellulose F/CC as
sample Asbestos
1 100.0% 0.0% 0.0
3 100.0% 0.0% 0.0
100.0% 0,0
5 0.0%
57.4% 0.0
6 42.6%
F/CC as asbestos.
As a consequence, no sample exceeds 0.01
NYC-WTC 000121418
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