GO. Structure Structure Type Length ID of Structure N or N EDS
No >=05 p (Nonadb
F B C M Chrys AmphilMle Nonasb Ambig/ND
No Coord <5p Elements)
;::r
O' <
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 >5p
"1/= EDS spectrum conforming to laboratory boles 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 Delected
CONFIDENTIAL, CITY_21MC100_0 03470536
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176572
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176572Source: 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.