GO. Structure Structure Type Length ID of Structure NorN EDS
No (Nonadb
F B C M >=05 p >=5p Chrys Amphibole Norasb Ambig/ND
No Coord <5p Elements)
Struct = > 0.5p >5:1 Aspect Ratio Grip acceptance:
N= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped 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
y'= EDS spectrum conformrng 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 Non-ldentifled i
Actinolite
NSD = No Structures Detected 1.
CONFIDENTIAL, CITY_21MC100_003471421
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000177171
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NYC-WTC_000177171Source: NYC Law Department, mirrored locally
Record containing transmission electron microscopy findings for an asbestos air sample collected from a New York City Board of Education location in March 2002.
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on April 4, 2002.