' GO. Structure Structure Type Length ID of Structure N or n) EDS
I---- - -------- No F B C M >=05 p :>=5(j Nonasb (Nonadb
Chrys Amphibole Ambig/ND
No I Coord <5p Elements)
Struct = > 0.5p _> 5;1 Aspect Ratio Grid acceptance:
n/= Positive diffraction pattern properties conforming to <50% undissolved filter, overfapped 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 libers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
M = Matrix Tremolite
Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITy_21MC100_003388570
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000229984
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NYC-WTC_000229984Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on February 3, 2002.
Laboratory report documenting transmission electron microscopy analysis of an air sample collected for the NYC Board of Education on November 27, 2001.
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on February 3, 2002.
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on February 3, 2002.