NYC 9/11 Public Portal Document
Lab Sample No. 62184
Client Spl. No. 12
LAB GROUP _#:
576i
- 10/25/01
Filter Type MCE _25 mm
Filter Area
ATC ASSOCIATES INC. — TEM ANALYSIS
NA)
P24
rzZ|_ tk
BYy Lc] |.
UF
Instrument 1.D. EM_10 CRX Grid I.D. Disk No.
Screen Magnification 16,400X (GO) Area 0.01124 mm*2 Comments
Acc. Voltage 80 kV No. GQ to be Analyzed _6 ( 4.721 Struct. Corspd. to 79 s/mn*
GO. Structure |Stucture Type Length LD. of Structure Nor % (Nonaab
0.5 um ; ; °
No Coord. No. F| BIC |M z 5 um 2 Sum |Chrys.| Amphibole | Nonasb. Ambig./ND| Elements
=)
ae
Photo No. (from | in 5 asbestos—
containing samples)
rane Struct. =
N=
Por chrysotile: 0.73nm
For amphiboles: 0.S3nm layer line repeat.
layer line repeat distance S3nm).
EDS s trum conforming to iaboratory
Identification criteria observed.
Vv
B=
c= Cluster
M= Matrix
NSD= No Structures Detected
>3 intersections)
> 0.5um & > S:1 Aspect Ratio
Not Observed (EDS spectrum or diffraction pattern)
= Positive diffraction pattern properties conforming
to laboratory identification criteria observed.
Fore P im spect fr (020) refiection
3am spacing for yer line repeat, streaking
of (110) and (130) reflections.
4.5 ratio of non-twinned wire line spot spacing to
P= Single Fiber (1-3 intersections = 1-3 fibera)
Bundle {33 fibers <1 fiber diameter apart)
Identify all structures usin, EDS
rid acceptance:
and a Portion of filter
Spprox subject to
examination
25mm Miter
Stopping Rules:
>80 2/G.0. or in Ist 4 G.0.
NYC-WTC_000104195
<50% undissolved PP
<10% particulate coverage >S0% coverage
at least 20 unfolded or overlapped
<5%_holes_or opaque
Check diffraction for asbestos
> to 70s/mim (ist 4)
Sr,
grid squares
Store all unrepeated spectra
Totals
M > Sum
FB C
Chrysotile
Amphibole
|
i
Ambiguous
AMPHIBOLES
Amosite
Crocidolite
Non-asbestos
Anthophyllite
Tremolite
Non-Identified
Actinolite
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000104195Source: NYC Law Department, mirrored locally