NYC 9/11 Public Portal Document
TEM Asbestos (air) Count Sheet
Client Name: NYC BOE Volume (liters): 1944
Lab Group #: 5979 Filter Type / Filter Area: MCE 385 mm^
Lab Sample #: 20 Grid Opening Size: 0.01124
Client Sample #: 20
Area Examined: 0.04496 mm^
GRID BOX: Magnification: 20,000
GRIDED: Accelerating Voltage: 100 KeV
# Grid Openings: 4 Analysis Date: 11/28/01
Analysis Performed By:
MARK PEYSAKHOV
GO. Structure Structure Type Length ID of Structure N or EDS
(Nonadb
No' F B C >=05 p :>=5p Chrys Amphibole Nonasb Ambig/ND
No Coord Elements)
<5|J
5=-
Struct = > 0.5(1 -> 5:1 Aspect Ratio Grid acceptance:
A- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals
laboratory identification criteria observed <10% particulate coverage >50% coverage ate
EDS spectrum conforming to laboratory
least 20 unfolded or overlapped grid squares <5% F B C M j
holes or opaque areas
identification criteria observed Chrysotile
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
NSC = No Structures Detected
CONFIDENTIAL, CITY_21MC100_003458488
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179224
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