i GO. Structure Structure Type Length ID of Structure N or ’/ EDS
(Nonadb
No F B C M >M)5p :>=5m Chrys Amphbole Nonasb Atnbig/ND
.1 No Coord <5m ElemenS)
C.
H4
r
: i ' "I ______ L_.
Struct «> 0.5g 5:1 AspcclRatio Grid acceplanca;
>/= Positive diflracfion peflem properties conforming to Totals
laboratory idantification criteria observed <10% particulate coverage >50% mverageats
least 20 untolded or overtapped grid squares <5% F B C M >5m
EOS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES Amphibole
F = Single Rber Amosite
B - Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbcstos
Tremoitte
Ms Matrix Actinolite Non-Identified
NSO = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003456504
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000178973
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NYC-WTC_000178973Source: NYC Law Department, mirrored locally
Laboratory data sheet recording transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on June 19, 2002.