TEM asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1810 Lab Group #: 6375 Filter Type / Filter Area: MCE 385 Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1./19/02

Analysis Performed By: MARKPEYSAKHOV

GO Structure j Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M 2=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

■--------------------------------

Struct = > O.ip > 5:1 Aspect Kado Grid acceptancg: 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 F B C 7= EDS spectrurri conforming to iaboratoy holes or opaque areas I identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single.Fiber Amosite B = Bundle (<3 libers fiber diameter apart Crocidolite Ambiguous C = Cluster (?3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified Actinolite NSD = No Structures Dslected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660173

NYC-WTC_000174757