GO. Structure Structure Type Length ID of Structure NorV EDS
No >=05 (J i>=5p (Nonadb
F B C M Chrys Amphibole Nonasb Ambig/ND
No Coord <5p Elements)
-----
Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance:
V= Positive diffraction pattern properties conforming to <507d 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
43 EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrysotile
; AMPHIBOLY i 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
I Actinolite
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC1OO_OO3468683
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181590
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000181590Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on February 2, 2002.