TEM asbestos air sample results, NYC BOE, June 2002
Machine-extracted title · confidence 50%
Laboratory data sheet recording transmission electron microscopy analysis of an air sample collected from a NYC Board of Education site on June 19, 2002.
GO. Structure Structure Type Length ID ot structure N or 7 EDS
(Nonadb
No Coord
No F B C M >=05 M >=52 Chrys Amphibole Nonasb Ambig/ND
Elements)
<5m
7 P(
Struct = > 0.5p > 5; I 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 overtapped 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 Amosite :
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite ' Non-Asbestos
Tremolite
M = Matrix Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC1OO_OO3461679
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179833
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000179833Source: 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 20, 2002.