GO. Structure Structure Type Length ID of Structure Norn/ EDS
No (Nonadb
F B C >=05 u :>=5p Ch^S Amphibole Nonasb Ambig/ND
No ' Coord <5p Elements)
‘I
4=
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 >5u
■ >/= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES ' - Amphibole
F = Single Fiber Amosite i
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ' Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC1OO_OO3389186
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000230383
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000230383Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample for asbestos collected from NYC Board of Education facilities.