TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N YC BOE Volume (liters): 1840 Lab Group 7455 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #; 11 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/18/02

Analysis Performed By: MARK .PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F B C M >=51J Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements) j

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Struct-> 0 5ti >5:1 Aspect Ratio Grid acceptance: 5 = Positive dittraction pattern properties conforming to <50% undissolMsd filter. oMeriappec or folded Totals laooratory iderifification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F ' B j C“pvl I 7- = EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Burole i <3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 interaectionsi Anthophyllite Non-Asbestos Tremolite M = Marx Actinolite Non-Identified ! NSC = Ido Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3471136

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176972