GO. Structure Structure Type Length ID of Structure N or a/ EDS
(Nonadb
No F B C M >=05 (J >=5|j Chrys Amphibole Nonasb Ambig/ND
No Coord Elements)
<5|J
znw /r
H
Struct = > 0.5p _> 5;1 Aspect Ratio Grid acceptance:
Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Totals
laboratory identification criteria observed
1*4nrtWcrt 1*1 iCiH <10% particulate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% F B C M >5|J
EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
j AMPHIBOLES j 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_21MC100_003458342
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179152
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000179152Source: 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.