TEM asbestos air sample results, NYC BOE, Feb 2002
Machine-extracted title · confidence 50%
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on February 3, 2002.
GO. . Structure Structure Type Length ID of Structure N or '/ EDS
No >=05 |j ;>=5iJ Amphibole Nonasb (Nonadb
F B C M Chrys Ambig/ND
, No Coord <5tJ Elements)
____
:__ z
I
Struct “ > 0.5p > 5:1 Aspect Ratio Grid acceptance:
7= 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 C M >5p
■/= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria obsen/ed 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_003467698
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180899
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NYC-WTC_000180899Source: NYC Law Department, mirrored locally