GO. Structure Structure Type Length ID of Structure NorV EDS
No (Nonadb
F B C M «05|J >=5p Chrys Amphibole Nonasb Ambig/ND
Elements)
/ , No Coord <5|J
//
(f
a
Struct = > 0.5n .> 5:1 Aspect Ratio Grid acceptance:
V = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals
Iaborato7 identification criteria observed <10% particulate coverage >50% coverage ate
least 20 unfolded or overiapped grid squares <5% F B C M >5p
EDS spectrum conforming to laboratory holes or opaque areas
identification criteria obsen/ed Chrysotile
[ AMPHIBOLES Amphibole
F = Single Fiber I Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix Non-ldentified
' Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_0 11533401
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181560
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NYC-WTC_000181560Source: NYC Law Department, mirrored locally