GO. Structure Structure Type Length ID of Structure N or v EDS
(Nonadb
No F B C M >=05 U I >=5h Chrys l Amphibole Nonasb | Ambig/ND
No Coord <5u
EiementsI
4* T
Struct = > 0.5u _> 5:1 Aspect Ratio Grid acceptance:
4= 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 souares <5% I • 4 C M I >5u
v= EDS spectrum conforming to iaooratory holes or opaque areas t
identification criteria observed Chry'sotile
AMPHIBOLES Amphibole
F = Single Fitter Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ( I
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite I
M = Matrix ' Non-Identtfied
Actinolite
NSD = No Structures Detecieo
CITY_21MC100_003106354
NYC-WTC_000185305
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NYC-WTC_000185305Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site in December 2001.