GO. Structure Structure Type Length ibofStructure Nory EDS
No (Nonadb
F B C M >=5p Chrys Amphibole Nonasb Ambig/ND
Elements)
<5p
s :±L f
f
Struct = > 0.5 p .>5:1 Aspect Ratio Grid acceptance:
V= 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 .>5p
>1- EOS spectrum conlorming to laboratory holes or opaque areas
identification criteria observed Chrysotile
: AMPHIBOLES I 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_OO338918O
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000230377
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000230377Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on February 3, 2002.