Technical data sheet recording transmission electron microscopy parameters and observations for the ninth asbestos air sample analyzed on January 22, 2002.
GO, Structure Structure Type Length ID of Structure N or v EDS
(Nonadb
No F B C >=05 (J >=5(j Chrys Amphibole Nonasb Ambig/ND
No Coord <5u Elements)
Struct = > 0.5 p. > 5:1 Aspect Ratio Grid acceptance:
Positive diffraction pattern properties conforming to "50% undissolved filter, overlapped or folded Totals
laboratory identification crrtena observed <10% particulate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% F B C i 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 oiameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
M = Matrix
Tremolite
Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003433524
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175811
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NYC-WTC_000175811Source: 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.