GO. Structure Structure Type Length ID of Structure NorV EOS
No (Nonadb
F B C M >=05 p i>=5m Chrys Amphibole Nonasb AmbigtND
No Coord <5p Elements)
..
Struct = >0.5u >5:1 Aspect Ratio Grid acceptance;
Positive diffraction pattern properties conforming to *^0% undissolved filter, overiapped or folded Totals
nri<10% particulate coverage >50% coverage ate
laboratory
l«
identification criteria observed
least 20 unfolded or overlapped grid squares <5% F B C M >5p
■7= EOS spectrum conforming to laboratory holes or opaque areas
Identification criteria observed Chrysotile
AMPHIBOLES i Amphibole
F = Single Fiber i Amosite
B, = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) ; Anthophyllite Non-Asbestos
M = Matrix Tremolite
Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003388751
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000230105
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000230105Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from NYC Board of Education facilities on April 29, 2002.