GO. Structure Structure Type Length ID of Structure N or v EDS
No (Nonadb
C M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND
No Coord <5y Elements) ।
Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance:
^1= 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 I C I M >5j
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 diameter apart Crocidolite Ambiguous
C = Cluster (>3 intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003467449
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180734
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NYC-WTC_000180734Source: 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 air samples collected from NYC Board of Education facilities on February 3, 2002.