ATC ASSOCIATES INC. - TEM ANALYSIS
LAB GROUP #: 5762 - 10/25/01
Operator
Filter Type MCE 25j
Lab Sample No. 62257
Filter Area 38 mm"2
Client Spl. No. 43 Disk No.
Grid ID
. .
Instrument I.D. EM 10 CRX Comments
(GO) Area 0.011_4 mm"2
Screen Magnification 16,400X ( 4 '721 Struc" Corspd. to 70 simm =
No. GO to be Analyzed 6
Acc. Voltage 80 kV
Nor,/ EDS
I. D . o r Structure (Nonasb.
Chr s. Amphibole Nonasb. Ambig./ND Elements
wMR ?' NONE
_________
1 7 Lit!• ~
~MONO
~~00101M=
I aai
aM=
~~—IaII~
NEON
liii
I
Store all unrepeated spectra
Check diffraction for asbestos
IdenUf y all iWeturos uein EDS 709 1pnm (lot 4)
Photo No. (from 1 In 5 asba.tos- Gri acceptance:
structures u to
containing samples)
Ratio
<50% undlssolve r, overlapped or e e
covers`.
Totals
SWct = > 0.5um & > 5:1 Aspect <10% particulate coverage >50%
overlapped grid aquarea F B C 5um
Observed (SOS spectrum or diffraction pattern) at least 20 unfolded or M
Na Not <5Z holes or opaque area.
artial co nforming
Positive dlffraIdsn pattern rops ebaenad.
p Unused portion
criteria Chrysotile
to Laboratory Identification of filter
Far abr7wUln 0.73nm s cle9 far (020) rsneetlons. ided portion
Av nite
of
0.03nm apactas for the sr lino repeat. streaking
of filter
at (110) and (130) rsflacuons. Porno of filter 2mm wide) Amphibole
Pm ampbib.leo: O.OSem Vr Itne repeat. and appm
to
-twinned Iayyaarr Itae spot spacing to eaamlinatien
3.0 ratio of ran
layer line repeat distance (O.23nm).
AMPHIBOLES Ambiguous
SD9 ■ from conforming to laboratory
iden IcaUon criteria observed. Arnasite
F. Single Fiber (1-3 intersections = 1-3 fibers) 25mm filter Crocidolite Non — asbestos
R= Rundle (>3 fibers <I fiber diameter apart) Anthophyllite
Cc Cluster (>3 intersections) 9tappiag Rule.:
Y= Matrix >10 ./c.o. or in let 4 c.o. Tremolite Non -identified
NYC-WTC 000104134
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NYC-WTC_000104134Source: NYC Law Department, mirrored locally