NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet
Client Name: NYC BOE- Volume (liters): 1928
Lab Group #: 6673 Filter Type / Filter Area: MCE 385 mm^
Lab Sample #: 18 Grid Opening Size: 0.01124
Client Sample #: 18 Area Examined: 0.04496 mm^
GRID BOX: Magnification: 2o;ooo
GRID ID: Accelerating Voltage: 100 KeV
# Grid Openings: 4 AnalysisDate: 2/14/02
Analysis Performed By:
■ MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N orV EDS
' (Nonadb
No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND
No Coord <5p Elements)
J
Struct = >0.5p >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 >5u
EDS spectrum confonning to laboratory holes or opaque areas
identification criteria observed Chrysotile
amphiboles"' Amphibole
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber diameter apart ■ Crocidolite Ambiguous
I Anthophyllite Non-Asbestos
C = Cluster (>3 Intersections)
; Tremolite
M = Matrix ! Actinolite Non-Identified
NSD = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003389079
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000230334
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