GO. Structure Structure Type Length ID of Stnjcture N or EDS
No >=05 p :>=5|J (Nonadb
F B C M Chrys Amphibole Nonasb Ambig/ND
No Coord <5m Elements)
( k
3=
Struct > 0,5|u >5:1 Aspect Ratio Grid acceptance:
'i= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped 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 >5m
EDS spectrum conforming to laboratory holes or opaque areas
Identification cntena obsen/ed Chrysotile
, 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 = Matnx Non-Identified
Actinolite
MSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003471031
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176904
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176904Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples for asbestos collected from a New York City Board of Education facility.