NYC-WTC_000228521

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NA’C BOE Volume (liters): 1920 Lab Group “302 Filter Type / Filter Area: MC E 3S3 mir.- { Lab Sample #: i Grid Opening Size: 0.01 i

Client Sample #: 03 Area E.yamined: 0 C4456 mm-

GRID BOX: Magnification: 20.000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/13/02

.Analysis Performed By: .MARK PE'TSAKHOV

GO Structure Structure Type Length ID of Structure \ or \ (Nonaob No Coord No F B c M >=05 u <5p i ■=5p Chrys Amphibole Nonasb Ambig/ND Elements)

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Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: ■7= 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 overtapped grid squares <5% F B C M >5u EDS spectrum confonning to laboratory holes or opaque areas identification cntena observed Chrysotile ''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 Actinolite Non-Idcntified NSD = No Structures Detected

CITY_21MC100_002900867

NYC-WTC_000228521