GO. Structure Structure Type Length ID of Structure N or 7 EDS
No (Nonadb
F B C >=05 M Chrys Amphibole Nonash Ambg/ND
Elements)
No Coord <5m
---------------- 1
I
2’
J
Struct = >0.5p >5:1 Aspect Ratio Grid acceptance:
V = Positive diffraction pattern properties conforming to Totals
laboratory identification criteria observed
least 20 unfolded or overlapped grid squares <5% F B S C M
7= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Clirysotile
AMPHIBOLE^ Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber dameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003470954
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176846
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NYC-WTC_000176846Source: 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 April 4, 2002.