GO. Structure Structure Type Length ID of Structure NorV EDS
No (Nonadb
F B C M >=05 u >=51J Chrys Amphibole Nonasb Ambig/ND
No Coord <5|j Elements)
.3 1
Struct = >0.5p >5:1 Aspect Ratio Grid acceptance:
a/= 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 >5u
^= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria obsen/ed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
T remolite
M = Matrix Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC1OO_OO3467856
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181009
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000181009Source: 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.