NYC-WTC_000204760

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: LFYC BOE Volume (liters): 1920 Lab Group #: 7390 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/13/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor? EDS ( No >=05 p i =5p Amphibole (Nonadb i F B C M Chrys Nonasb Ambig/ND No Coord <5m Elements)

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I Struct = > 0.5p .>5:1 Aspect Ratio Grid acceptance: 7 = Positive diffraction pattern properties conforming to <50% unflissolved filter, overlapped or folded Totals laooratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B ’ C M i >5u 7= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous j C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos : Tremolite M = Matrix I Non-Identified i Actinolite NSD = No Structures Detected i___ ' .1

CITY_21MC100_003061866

NYC-WTC_000204760