NYC-WTC_000223896

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: _NYC BOE Volume (liters): 1921 Lab Group tt: 7809 Filter Type / Filter Area: MCE 385 mm- Lab Sample tl: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 70 000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5 21/02 Analysis Performed By: _______ 1/^/^

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure \ or V EDS No (Nonadb F B C >=05 (J Chrys Amphitwie Nonasb Ambig/ND No Coord <5p Elements)

J LZ II

J

Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratoiy idendfication criteria observeo < 10% particulate coverage >50% coverage ate least 20 unfolded dr overlapped grid squares <5% [ F B C i M I >50 7= EOS spectrum conforming to laboratory holes or opaque seas ------- - --------- 1---------- identification criteria obseived Chrysotile I AMPHIBOLES 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 i Non-Identified Actinolite NSD = No Structures Delected

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NYC-WTC_000223896