TEM Asbestos air sample results, NYC BOE, Jan 24 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6416 Filter Type / Filter Area: MCE 385 Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 mm^ GRID BOX: Ma2nification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS No (Nonadb F 'B C M >=05 u ;>=5)J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Sv

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: '1= Positive diffraction pattern properties conforming to 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 I M >5u 'J= EDS spectrum conforming to laboratory holes or opaque areas ---- identification criteria observed Chrysotile AMPHIBOLES^ Amphibole F = Single Fiber Amosite [ B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite I Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite 1 1 NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003433546

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175826