NYC 9/11 Public Portal Document
1 ATC ASSOCIATES INC. - TEM ANALYSIS
LAB GROUP #. 5710 - 1006 0: ,1
Lab Sample No. 6255 miter Type MCE 2S mm operator(- C'
Client Sp1 No. H-2 Filter Area 333 mm"
instrument L.D. EM 10 CRY Grid L.C. L! f Disk Nc.
Screen Magnification 16,400:( (GO) Area 0. _-'-4 mm" Comments
Acc. Voltage 90 kV No. GO to be Analysed o 4.72. Strum Corsad. fl s mr
GO. Structure Structure Type Length I.D. of Structure EDS
N or,/
30.5 um (Nonasb.
No Coord. No. F B C M < 5 um 5um 'Chrys. Amphibole Nonasb. Ambig./ND Elements)
to 3 P -Ls
Is'
I
I
I
Li
I
I
Photo No. (from 1 in 5 asbestos- Th4nufy all structures ucing EDS
containing samples)
Check diffraction for asbestos Stare all unrepeated spectra J
IGrid acceptance:I structures up to 70s trim (let 4)
SLrucL = > 0.5urn & > 5:1 Aspect Ratio <50% und&aaolved filter, overlapped or (o1de4
<10x particulate coverage >50% coverage Totals
N3 Not Observed (EDS spectrum or diffraction pattern) m t least 20 unfolded or overlapped grid squares
<5% holes or opaque areas I F C >j 55 um
V/ Positive diffraction pattern properties conforming B M
to laboratory identification criteria observed. Unu■ed portion
For ebryaetile: 0.73am spacing (or (020) reflections, of (titer Chrysotile
0.33nm spacing for the layer line repeat, streaking Avoided portion
of (110) and (130) rerleettona. at filter
For amphtbales: 0.53am layer line repeat. and apps.. Portion of (liter (2mm wide)
3.3 ratio of oon-tetnnad layer line spat .pactng to sttalveL to
eeamtnatien
Amphibole
layer line repeat distance (0.33nm).
1 EDS spectrum conforming to laboratory
identification criteria observed.
F- Single Fiber (1-3 intersections = 1-3 fibers)
Be Bundle (>3 fibers <1 fiber diameter apart)
_ (>3 Interaectiona)
25mm filter
7
AMPHIBOLES
Amosite
Crocidolite
Ambiguous
g
Non —asbestos
~ Matrix
lusts ybopptng awes: Anthophyllite
1 N50= Na Structures Defeated
L\DATA\PRIVATE\NlKW\GDDVEM2
[ >3o 's/c.o. or to 1st 4 3.0.
9/22/98 L
Tremolite
Actinolite Non —Identified
NYC-WTC 000104336
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