GO. Structure Structure Type Length ID of Structure N or V EDS
No (Nonadb
F B C M >=05 M >=5)j Chrys Amphibole Nonasb Ambig/ND
' No ’ Coord <5p Elements)
Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance;
'J- 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 >5u
V= EDS spectrum conforming Io laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber dianneter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix Actinolite Non-ldentified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003470854
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176782
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NYC-WTC_000176782Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on January 26, 2002.
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on January 26, 2002.
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on January 26, 2002.