GO. Structure Structure Type Length ID of Structure N or / EDS
No •=05p Nonasb (Nonadb
F B C M >=5p Chrys Amphibole Ambig/ND
No Coord <5m Elements)
J -
il
Struct = > 0.5g _> 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 >5|j '
■/= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria obsenzed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
T remolite
M = Matrix - Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC1OO_OO3468626
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181536
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000181536Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on April 28, 2002.