GO. Structure Structure Type Length ID of Stnjcture N or v EDS
No (Nonadb
F B C Chrys Amphibole Nonasb AmbigiND
/ /7 No Coord <5p Elements)
ZW
___
a
—
Struct = > O.dp 5:1 Aspect Ratio Gric acceptance:
•i- Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals
laboratory identification criteria observed <10% parfrcuiate coverage >50% coverage ate
least 20 unfolded or overiapped 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
I T remolite -
M = Matrix -
! Actinolite Non-Identifled
NSD = No Structures Detected I________________
CONFIDENTIAL, CITY_21MC100_003388615
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000230014
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000230014Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on January 27, 2002.