GO. Structure Structure Type Length ID of Structure NorN EDS
No (Nonadb
F B C. .M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND
. _ No Coord <5p Elements)
•'R A
Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:
'i= 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 >5p
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-Identified
Actinolite
NSD = No Structures Detected
CITY_21MC100_002921114
NYC-WTC_000225177
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NYC-WTC_000225177Source: NYC Law Department, mirrored locally
Technical report presenting transmission electron microscopy data for an air sample analyzed on December 8, 2001 for the New York City Board of Education.