NYC 9/11 Public Portal Document
I ATC ASSOCIATES INC. - TEM ANALYSIS
LAB GROUP 8 5'69 - 10%26/31
Lab Sample No. 62513 Filter Type MCE :5 mm Operator________________
Client Sol. No. 0' Filter Area 385 mm"2
Instrument 1.D. EM 10 CRX Grid I.D. DisK No.
Screen Magnification 16,400X (GO) Area 0.011Jv mm'2 Comments
Acc. Voltage 80 kV No. GO to be Analyzed 6 4.72 Struct. Corsod. cc 7 - mm'-
GO. Structure Structure Type Length I.D. of Structure EDS
N arm,'
30.5 um (Nonasb.
No Coord. No. F B C M >. Sum Chrys., Amphibole Nonasb. Ambig./NDI Elements
< 5 um
2 l v
H
L II
I
Photo Na. ((ram 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra
1 containing samples)
StrucL = > O.Sum k > 5:1 Aspect Ratio
Grid acceptance:
<SOS undiasolve
structures u to 70s slim (lot 4)
i er, aver appe or o e
<10% particulate coverage >50% coverage
N- Not Observed (EDS spectrum or diflrsction pattern) at least 20 unfolded or overlapped grid squares
Positive diffraction pattern properties conforming
<5% holes or o a ue areas F B
Totals
C M > 5um
1
to laboratory identification criteria observed. Unaaed Portion
Far ehry.otlle: O.l3nm spacing for (020) reflections. of niter Chrysotile
0.33nm spaaiag for the layer line repeat el:anking Avoided portion
of (110) and (lag) reflection. of filter
For amphiboles: O.53nm layer line repeal and appear. Portion of filter (2mm side)
eubleat to Amphibole
r
3.5 ratio of non-twinned layer line spat spacing to
layer line repeat distance (0.23nm1. eeam:nation
V' EDS spectrum conforming to laboratory Ambiguous
identification criteria observed. AMPHIBOLES
F. Single Fiber (1-3 intersections = 1-3 fibers) Amc alts
B. Bundle (>3 fibers <1 fiber diameter apart)
Ce Cluster (>3 Interections)
25mm filter Croeidolite Non —asbestos
I r~ Stoppi ng Rule.: Anth e P h Y llite
M= liatrts
NSD- Na Structures Detected >50 ./C.O. or in let 4 C.O. Tremolite
Non —Identified
L• \DATA\ PRIVATE\MllCEc\CADD\TEMD 9/22/9e Actinolite
NYC-WTC 000104274
OCR can misread numbers and units. Confirm readings against the page image before using them.