ATC ASSOCIATES INC. - TEM ANALYSIS
LAB GROUP #: 5761 - 10/25/01
Filter Type MCE 25 mm Operator
Lab Sample No. 62195
Filter Area 85 mm 2
Client ent. No. 22
Disk No.
Instrument I.D.0 EM 10 CRX Grid I.D.
0.0112¢ mm 2 Comments
Screen Magnification 16.400X (GO) Area
No. GO to be Analyzed 6 ( 4.721 Struct. Corsrd. to 70 s m:
I Acc. Voltage
GO.
80 kV
Structure Stuctu re Type
r
Length I.D. of Structure N or . /
EDS
J (Nonasb.
30.v5 ram >, Sum Ambig./ND Elements
No Coord. No. F B C M Chrys. Amphibole Nonasb.
I
Identify all structures win EDS Chi
Photo No. (from 1 in 5 asbestos- (let 4)
containing samples) Gri acceptance: sir
Struct. = > 0.5um k > 5:1 Aspect Ratio
<50% undissolve r, o
<10% particulate coverage >50% coverage
Totals
N= Not Observed (BDS spectrum or diffraction pattern) at leant 20 unfolded or overlapped grid squares
<5% holes or opaque arena
✓= positive diffraction pattern properties conforming
to laboratory identification criteria observed. cowed portion
of filter Chrysotile
Por chrysoUlr. 0.73nm soscinj for (020) reflections.
■treawas
0.59nm spacing for the layer llna repent. Avoided portion
of (110) area (1011) reflections. of filter
(2mm wide)
For amphibole.: 0.55am layer line repeat. and appros.
3.5 nUo of floe-twinnedUyer lane spot spadng is
E
Portion of roller
eubJacint
•sam•Uae
P
Amphibole
layer line repeat distance (0.53nm).
EDS spectrum conforming to laboratory AMPHIBOLES Ambiguous
identification criteria observed.
AmoBite
Pe Single Fiber (1-3 intersections- 1-3 fibers)
Be Bundle >3 fibers <1 fiber diameter apart) 25mm tiller Crocidolite Non — asbestos
Co Cluster (>3 intersections) stepping Suiea Anthophyllite
roe Matrix >5o a/c.o. or in net s c.o. Tremolite
NSD= No Structures Detected Anti nolite
Non —Identified
NYC-WTC 000104205
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000104205Source: NYC Law Department, mirrored locally