NYC 9/11 Public Portal Document
ATC ASSOCIATES INC. - TEM ANALYSIS
LAE GROUP #: 57 7j - la/25/02
Filter Type MCP _5 mm (
Lab Sample No. 62584 operator '
Client Spl. Nc 0 Filter Area 385 mm'2
Instrument I.D EM 10 CRX Grid I.D. 4' S0'•c Disk Nc.
' Screen Magnification 16,400X IGO'! Area 0.01114 mm":. Comments
Acc. Voltage 90 ky No. GC to be Analyzed o 4.'2: Struc: Corsod. c_ s mm^ _
n GO. Structure structure Type Length I.D. of Structure N or ,t/ EDS
L: No Coord. No. F B C M
>0.5 um
Sum Chrys. Amphibole Nonasb. Ambig./ND,
(Nonasb.
Elements)
I
I
I
I
I
I
I
I
I
`Photo No. (from I in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra
I containing samples)
SLrucL = > 0.5um & > 5:1 Aspect Ratio
Grid acceptance:
<50% undissolve
structures up to 703 trim (let 4)
i er, overappe or wince
<10% particulate coverage >50% coverage
Mn Nat Observed (EDS spectrum or diffraction pattern) let least 20 unfolded or overlapped grid squares
Positive diffraction pattern properties conforming
<5% holes or o a ue areas
Totals
to laboratory Identification criteria observed. Uaa■ed portion
For chry■atilei 0.l0nm spa In for (090) reflections. of filter Chr Sotlle
0.39nm spacing for the layer Ilne repeat, streaking Avoided portion 'Y
of (110) and (130) reflections, of filler
For amphlboieai 0.50nm layer line repeat, and approa. Portion of filter (2mm side)
0.5 redo of non-twinned layer line spot spacing to subject to
...min.Uee
Amphibole
layer line repeat distance (0.30nm1•
EDS spectrum conforming to laboratory
Identification criteria observed. I AMPHIBOLES Ambiguous
P- Single Fiber (1-3 Intersections = 1-3 (ihere) Amosite
H= Bundle (>3 fibers <1 fiber diameter apart)
C= Cluster (>3 intersections)
25mm filter Crocidolite Non —asbestos
—: Stopping Rules: Anthophyllite ,
' M= Matrix
NSD= No Structures Detected >50 sjG.O. or in let 4 G.O. I Trem°lite
Actinolite i son -Identified
L•\DATA\PRIVATE\MIKEG\CADD\TEX2 9/22/08
NYC-WTC 000104398
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