TEM Asbestos air sample results, NYC BOE, Apr 2002
Machine-extracted title · confidence 95%
Laboratory report documenting transmission electron microscopy analysis of an air asbestos sample from the NYC Board of Education dated April 10, 2002.
GRID BOX: Magnification: 20,000
GRID ID: Accelerating Voltage: too KeV
ri Grid Openings: 5 Analysis Date: 4/10/02
Analvsis Performed By:
MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure Nor N EDS
No >=05 p (Nonadb
F B C M Chrys Amphibole Nonasb Ambig/ND
No Coord <5p Elements)
z eg
A
Struct = > 0.5)j >5:1 Aspect Ratio Grid acceptance:
Positive diffraction panerr properties conforming to iihdissolved 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 >5u
EDS spectrum conforming to laboratory holes or opaque areas
Identification 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
Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_009505361
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000178864
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NYC-WTC_000178864Source: NYC Law Department, mirrored locally