TEM asbestos air sample results, NYC BOE, Apr 2002
Machine-extracted title · confidence 50%
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on April 28, 2002.
GO. Structure Structure Type Length ID of Structure N or 7 EDS
(Nonadb I
No F B C M >=05 p :>-5u Chrys Amphibole Nonasb Ambig/NO
Elements)
3L No Coord
G
<5m
____ 1
4^
5^ -
y?-
___
Struct = >0.5p >5:1 .Aspect Ratio Grid acceptance:
■>/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals
laboratory identification criteria observed <10% paniculate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% F B C M >5iJ
EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix Non-ldentified
Actinolite
N3D = No SIructures Detectec
CONFIDENTIAL, CITY_21MC100_003471323
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000177102
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NYC-WTC_000177102Source: NYC Law Department, mirrored locally