Li
ATC ASSOCIATES INC. - TEM ANALYSIS
LAB GROUP . 5761 - 10/25/01
Lab Sample No. 62204 Filter Type MCE 25 mm Operator
Client Sp1. No. 31 Filter Area
Instrument I.D. EM 10 CRX Grid I.D. Disk No.
Screen Magnification 16.400X (GO) Area 0.0112 mm^ 2 Comments
70 s/mm"Z
Acc. Voltage 80 kV No. GO to be Analyzed 6 ( 4.721 Struct. Corspd. to
Li GO. Structure structure Type
0 5 um
Length I.D. of Structure EDS
N cry'
(Nonasb.
No Coord. No. F B C M < s um >. 5um Chrys. Amphibole Nonasb. Ambig./ND Elements)
I
I
I
I
Li
Identify all structures using EDS Check diffraction for asbestos Store all unrepeate
Photo Na. (from 1 in 5 asbestos-
containing samples) Grid acceptance: structures u to 70.('&m (let 4)
<50% undissolve r, overlapped or o e
Struct. = > 0.5um 8 > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals
N. Not Observed (Ens spectrum or dtffncUon pattern) at least 20 unfolded or overlapped grid squares
•<5% holes oropaque arms
Positive diffraction pattern properties conforming
to laboratory Identification criteria observed. unused portion
For ehryoUlr. 0.75am ■peel for (020) reflections. of filler Chrysotile
0.53am spacing for the layer en. repeat. streaking Avoided portion
of (110) and (30) reflections. of niter
For amphiboles: 0.55am layer line repeat. and approx. Portion of fitollerf(2mm aide)
subject Amphibole
5.5 ratio of non-taknoad layer Iln. spot spacing b a:amisWen
layer Ili. repast distance ( 50nm).
EDS spectrum conforming to laboratory
AMPHIBOLES
Ambiguous
idenlific&Uon criteria observed.
P= Single Fiber (1-3 intersections = 1-3 fibers) AnlOsite
I B= Bundle (>3 fibers ci fiber diameter apart)
C= cluster (>3 Intersections)
Matrix
NSD= No Structures Detected
25mm niter
tapplag Rule.:
>50 ■/C.O. or in
tit ♦ 0.0.
Crocidolite
Anthophyllite
Tremolite
Actinolite
Non—asbestos
Non —Identified
NYC-WTC 000104214
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000104214Source: NYC Law Department, mirrored locally