TEM Asbestos air sample results, NYC BOE, Mar 2002
Machine-extracted title · confidence 95%
Laboratory report documenting transmission electron microscopy analysis of an air filter sample collected from a New York City Board of Education site.
GO, Structure Structure Type Length ID of Structure Nor v EDS
No (Nonadb
F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND
No Coord <5|J Elements)
Struct = > 0.5n >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
^/= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
i AMPHIBOLES ’ Amphibole
F = Single Fiber I Amosite
B = Bundle (<3 fibers <1 fiber diameter apart ' Crocidolite Ambiguous
C = Cluster (>3 intersections) I Anthophyllite Non-Asbestos
Tremolite
M = Matrix Non-Identified
NSD = No Structures Detected
Actinolite
.1.
CONFIDENTIAL, CITY_21MC100_003470637
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176636
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176636Source: NYC Law Department, mirrored locally