TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8759 Filter Type / Filter Area: MCE 385 mm- , Lab Sample #: 13 Grid Opening Size: 0 01124 Client Sample #: 13 Area Examined: 0 04496 mm- GRID BOX: £5^^^ Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By; ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or s EDS (Nonadb No F B c M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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Struct = > 0 5p >5 I Aspect Ratio Grid acceptance ^/= 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 gnd squares <5% F B C M >6p 7= EDS spectrum conforming to laboratory holes or opaque areas Identification cnteria observec 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 = Matnx Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO34313O8

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175513