GO, I Structure \ Structure Type Length ID of Structure N or •7 EDS !
No ! F ’ B i C ' M (Nonadb j
>=05 p r~ -5p Chrys Amphibole Nonasb Ambig/ND
Elements) I
No Coord <5p
/
■z. -
Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:
</= Fositive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals
laboratory identification critena observed <10% particulate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% F B C M I >5iJ
EDS spectrum conforming to laboraloty holes or opaque areas
identification criteria observed Chiysotile
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 Non-Identified
Actinolite,
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003458359
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179161
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000179161Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from NYC Board of Education facilities on April 29, 2002.