TEM Asbestos air sample results, NYC BOE, Jan 31 2002
Machine-extracted title · confidence 50%
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on January 31, 2002.
GO. Structure Structure Type Length ID of Structure N or v EDS
No >=05 u (Nonadb
F B C M '=5p Chrys Amphibole Nonasb Ambig/ND
No Coord <5p Elements)
2-
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:
'J= Positive diffraction pattern properties conforming to <50% undissolved filter, everlapped or folded Totals
laboratory identification critena observed <10% particulate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% B C I M I >5u
EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
T remolite
M = Matrix Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003467634
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180851
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NYC-WTC_000180851Source: NYC Law Department, mirrored locally