GO. Structure Structure Type Length ID of Structure N or EDS
No (Nonadb
F B C M >=05 M :>=5(J Chrys Amphibole Nonasb Ambig/ND
No Coord .<5m Elements)
____ <
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% particulate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% F B C M >5m .
^1= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
i AMPHIBOLES S 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-Identified
Actinolite
NSD = No Structures Detected
CITY_2lMC100_000622486
NYC-WTC_000225446
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NYC-WTC_000225446Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected for the NYC Board of Education on November 26, 2001.