GO. Structure Structure Type Length ID of Structure Nor v ' EDS
No F B C M vFF i>=51J Chrys Amphibole Nonasb AWNon <^**’*’\
_ No Coord <5m Elements)
/Ffe
__
1/
Y- —
Struct = > O.Sg > 5:1 Aspect Ratio Grid acceptance:
7= Positive diffraction pattern propertiesconforming 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% IF B ! C I M
\= £DS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003471069
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176928
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176928Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on January 26, 2002.