GO, Structure Structure Type Length ID of Structure N or 4 EDS
No (Nonadb
I- B C M ■=05 p >=5p Chrys Amphibole Nonasb Ambig/ND
I No : Coord <5p Elements)
52
T / -7
Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance:
4= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals
laboratory identification criteria obsen/ed <10% particulate coverage >50% coverage ate
least 20 unfolded or overlapped grid squares <5% F i B C M >.5u
4= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
) amphibol.es Amphibole
F = Single Fiber I Amosite
B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous
C = Cluster (>3 Intersections) i Anthophyllite Non-Asbestos
Tremolite
M - Matrix Non-Wentified
Actinolite
NSD = No Structures Detected
CITY_21MC100_003266654
NYC-WTC_000200176
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NYC-WTC_000200176Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on December 24, 2001.
Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site in December 2001.
Laboratory report documenting transmission electron microscopy analysis of an air sample collected for the NYC Board of Education on November 26, 2001.
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on December 24, 2001.
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on December 24, 2001.