GRID BOX: Magnification: 20,000
GRID ID : Accelerating Voltage: too KeV
# Grid Openings: 4 Analysis Date: 2/18/02
Analysis Performed By:
MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or V EDS
No >=05 u :>=5p Amphibole (Ndnadb
F B C M Chrys Nonasb Ambig/ND
No Coord <5|j . Elements)
__
a
Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance:
•/= Positive diffraction pattern properties conformjog 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 Io laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
S = 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_21MC1OO_OO3433781
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175944
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NYC-WTC_000175944Source: NYC Law Department, mirrored locally
Document containing laboratory findings for a transmission electron microscopy analysis of an asbestos air sample from a New York City Board of Education site.
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on January 27, 2002.
Document containing laboratory findings for a transmission electron microscopy analysis of an asbestos air sample from a New York City Board of Education site.
Document containing laboratory findings for a transmission electron microscopy analysis of an asbestos air sample from a New York City Board of Education site.