GO. Structure Structure Type Length ID of Structure N or EDS
No (Nonadb
F B C M >=05 M >=5p Chrys Amphibole Nonasb Arabig/ND
Elements)
No . Coord <5p
Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:
Positive diffraction pattern properties conforming to <50% undissdved filter, overiap^d 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
’/= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
; amphi'boles ' Amphibole
F = Single Fiber ■ Amosite
B = Bundle fibers <1 fiber diameter apart i Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matrix N on-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_0 03470544
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176578
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176578Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on January 28, 2002.