GO. Structure Structure Type Length ID of Structure Not~7 EDS
No >=05 M (Nonadb
F B C M >=5p Chrys Amphibole Nonasb Ambig/ND
No i Coord <5|J Elements)
&
f
Struct = > O.Spi „> 5:1 Aspect Ratio Grid aaeptance:
Positive diffraction pattern propertiesconforming to <60% undissolved filter, overlapped or folded Totals
laboratory identification criteria observed <10% partculate 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 Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003468650
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181552
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000181552Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on January 28, 2002.