TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 7406 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mm’

GRID BOX: xMagnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C M >=05 p. >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

If

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Struct = > 0.5p > 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 overlapped grid squares <5% F B C M I >5u EDS spectrum conforming to laboratory holes or opaque areas —I------ identification criteria observed Chrysotile AMPHtBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber d ameter apart Crocidolite Ambiguous C = Cluster f>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identifted Actinolite I___ NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471075 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176934