GO. Structure Structure Type Length ID of Structure N or ECS
(Nonadp
No' F B C M >=05 u >=5p Chrys j Amphibole Nonasb Ambig/ND
No Coord <5p Elements)
i
Struct = > O.Iu _> 5:1 Aspect Ratio Grid areeptance:
y!- Positive diffraction pattern properties conforrning 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 M >5p
\= EDS spectrum conforming to laboratory holes or opaque areas
Ci 1 B'S o tile
identification criteria obsen/ed
AMPHIBOLES
t
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_003467383
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180691
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000180691Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on February 2, 2002.