I
ATC ASSOCIATES INC. - TEM ANALYSIS
I LAB GROUP It: 5762 - 10/25/01
Filter Type MCE 25 mm Operator lip
Lab Sample No. 62218
Client Spl. No. 4 Filter Area 385 mm"2
I Instrument Z.D. EM 10 CRX Grid I.D. Disk No.
Comments
Screen Magnification 16,400X (GO) Area 0.01124 mm2
80 kV No. GO to be Analyzed 6 ( 4.721 Struct. Corspd. to 70 s/mm"2.)
Acc. Voltage
I GO. Structure structure Type Length I.D. of Structure EDS
N or,/
(Nonasb.
No Coord. No. X0.5 um
F B C M 1 Chrys. Amphibole Nonasb. Ambig./ND Elements)
1
ii
I
I
I
I
I
I - Photo No. (from 1 in 5 asbestos-
containing samples)
Identify all structures using EDS
IGrid accept.ance:I
Check diffraction for ast
structures u to 70s iir
on
(Let 4)
Store all unrepeated spectra
StrucL = > 0.5um & > 5:1 Aspect Ratio <50% undissolved r, overlapped or foldecI
Totals
I
articulate coverage >50% coverage
N= Not Observed (BDS spectrumordlffracUon pattern) 20 unfolded or overlapped grid squares
Positive diffraction patters properties conforming Mine Oropaque gross
to laboratory Identification criteria observed. Unud
se portion
For ehrysettle: 0.70nm .pafitng for (020) reflections. of lter Chr sotile
0.01nm spacing for the later lino repeat, streaking y
of 1110) and (190) refie.tioaa. ed portion
ter
For amphibole.: 0.03m Layer line repeat, and filter wide)
9.5 ratio of non-twinned Layer line spot spacing to Amphibole
layer lies repeat distance (0.59nm).
EDS ng to tory
I ntificati n criteriaobservved`~ ro AMPHIBOLES Ambiguous
Fa Single Fiber (1-3 intersections = 1-3 fibers) site
B= Bundle >9 fibers <1 fi ber diameter apart) appros.(e:22mm filter Crocidolite Non —asbestos
Cluster >9 intersection.)
CoMatr BtePPI=a Rule.: Anthophyllite
NSD= No Structures Detected >5o 5/0.0. or in let 4 c.o. Tremolite
Non -Identified
NYC-WTC 000104096
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000104096Source: NYC Law Department, mirrored locally
Technical data sheet recording transmission electron microscopy measurements and structural identification for asbestos fiber samples from a school site.