NYC-WTC_000202370

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1912 Lab Group #: 8828 Filter Type / Filter Area: MCE 385 nim’

GridJJpeningSi^ 0.01124 Lab Sample #: 3 Client Sample #: 03 Area Examined: 0.04496 mm’

•GRID BOX: Magnillcation: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

Analysis Performed By: MARK PEYSAKHOV

Structure Structure Type Length ID of Structure N or a) EDS GO. (Nonadb No F B C M >=05 u i>=5(J Chrys Amphibole Monasb Ambig/NC No Coord Elements) <5m

J 'I

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Struct = > 0.5,u > 5:1 Aspect Ratio Grid acceptance; -/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observefl <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >50 ya EDS spectrum conforming to laboratory holes or opaque areas identification criteria ooserved Chrysotile AMPHIBOLES Amphibole F - Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 7‘= Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldent:fied Actinolite NSD = Mo Structures Detected

CITY_21MC100_003272379

NYC-WTC_000202370