GO, Structure Structure Type Length ID of Structure N or 'Z EDS
No (Nonadb
F B C M >=05 pi >=5p Chrys Amphibole Nonasb Ambig/ND
No Coord <5p Elements)
4i
I
Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:
<= 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
y'= EDS 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-ldentified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003470366
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176462
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176462Source: 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 April 4, 2002.