GO. Structure Structure Type Length ID Of Structure N or V EDS
No - >=05 p Amphibole Nonasb (Nonadb
F B C M >=5p Chrys Ambig/NO
No .Coord <5p Elements)
77^
if-
(f
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance;
yl- Positive diffraction pattern properties conforming 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
EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
I AMPHIBOLES Amphibole
F = Single Fiber I Amosite
B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite Ambiguous
C = Cluster (>3 Intersections) i Anthophyllite Non-Asbestos
Tremolite
lvl = Matrix - ' Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003470458
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176515
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176515Source: 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 1, 2002.