GO. Structure Structure type Length ID of Structure N or V EDS
No >=05 p (Nonadb
F B C M Chrys Amphibole Nonasb Ambig/ND
No Coord <5p Elements)
V
/(J
Struct = > 0.5 p ,> 5-. 1 Aspect Ratio Grid acceptance:
n/x PosiSve diffracKn pattern properties conforming to "50% undissoived 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
•/= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
AMPHIBOLES Amphibole
F = Single Fiber Amosite
S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite
M = Matnx Non-Identified
Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003470716
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176688
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176688Source: 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.