GO. Structure Structure Type Length ID of Structure N or V EDS
(Nonadb
No F B C M >=05 p >=5|J Chrys Amphibole Nonasb Airtjig^lD
No Coord <5p Elements)
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:
’/= Positive diffraction pattern properties confomiing 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 >5m
'/= EOS spectrum conforming to laboratory holes or opaque areas
identification cntena 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
Tremolite
M = Matrix Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003467243
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180617
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NYC-WTC_000180617Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample for asbestos collected from NYC Board of Education facilities.