NYC-WTC_000212479

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ('lient Name: NYC BOE Volume (liters): 1920 Lab Group #: 7477 Filter Type / Filter Area: MCE 385 mm^ 1 ab Sample #: 5 Grid Opening Size: 0.01124 C lient Sample #: 05 Area Examined: 0.04496 mm-

(;RID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND Mo Coord <5p Elements)

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Ihruct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: 1= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria otiserved <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p r = EDS spectrum conforming to laboratory holes or opaque areas Identification catena observed Chrysotile AMPHIBOLES Amphibole f = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbesios T remolite 14 = Matrix Non-Identified Actinolite NSD = No Structures Detectec

CITY_21MC100_002866667

NYC-WTC_0002 12479