IGC Structure Structure Type Length ID of Structure Nor 'I EDS
No (Nonadb
F B C M >=05 p :>=5p Chrys Amphibole Nonasb Ambig/ND
I No : . Coord <5m Elements)
•t
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% paniculate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% F B C M >5m
EDS spectrum conforming to laboratory holes or opaque areas
idendficatlQn 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_0 03470656
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176646
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NYC-WTC_000176646Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air filter sample collected from a New York City Board of Education site.
Laboratory report documenting transmission electron microscopy analysis of an air filter sample collected from a New York City Board of Education site.
Laboratory report documenting transmission electron microscopy analysis of an air filter sample collected from a New York City Board of Education site.