GO. Structure Structure Type Length ID of Structure Norv EDS
(Nonadb
No F B C M >=05 p >=5(1 Chrys Amphibole Nonasb Ambig/ND
No Coord i Elemenls)
<5p
Qu if
if
U
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:
']= ’ositive 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 ovedapped grid squares <5% F B C M >5p
EDS spectrum conforming to laboratory holes or opaque areas
identification criteria obsen/ed Chrysotile
i AMPHIBOLES 1 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_003467834
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000180993
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000180993Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on February 3, 2002.