GO Structure Structure Type Length ID of Structure Norv EDS
(Nonadb
No F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND
No Coord <5u Elements)
a7^
(l
Struct = > 0 f n _> 5 1 Aspect Ratto Gnd acceptance
<= Positive diffraction pattern properties conforming to ^^0% undissolved filter, overlapped or folded Totals
laboratory identification criteria observed <10% partculats coverage >50% coverage ate
least 20 unfolded or overlapped gnd squares <5% F B C M >5u
'/= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
amphTboles 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_21MC100_003088217
NYC-WTC_000189826
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NYC-WTC_000189826Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on February 19, 2002.