GO. Structure Structure Type Length ID of Structure N or EDS
No >=05 p ■>=5p Nonasb (Nonadb
F B C M Chrys Amphitxjie Ambig/ND
No Coord <5m Elements)
/ ;
u
if
J
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:
PosiSve diffraction pattern properties conforming to *50% undtoolved Ater, overlapped or folded Totals
, laboratory identification criteria observed <10% particulate coverage >50% coverage ate
least 20 unfolded or overtapped grid squares <5% F B C M >5p '
V: EDS spectrum. conforming to laboratory holes or opaque areas
identification criteria observed 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 = Matrix - Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003470405
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176486
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176486Source: NYC Law Department, mirrored locally
Laboratory data sheet recording transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on June 19, 2002.