Analysis Performed By: _
MICHAEL GORYCKI
/w
GO. Structure Structure Type Length ID of Structure N or T EDS
No (Nonadb
F B C M >=05 p >=5(J Chrys Amphibole Nonasb Ambig/ND
No Coord <5p Elements) i
ZlZSZ
tf
rr
fr
! I ___
Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance:
T= 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 i M >5u
V= EDS spectrum conforming to laboratory holes or opaque areas
identification criteria observed Chrvsotile 1
AMPHIBOLES Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos
Tremolite I Noii-ldentified 7
M = Matrix
Actinolite
NSD = Nc Structures Detected
CONFIDENTIAL, CITY_21MC100_003470896
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000176810
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000176810Source: 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.