TEM asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asb^os fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6398 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/22/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 |j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

' o <5

T

Struct = > 0.5(1 .> 5:1 Aspect Ratio Grid acceptance: N= Positive diffraction pattern oroperties conforming to undissolved filter, overlaoped or folded Totals laboratory identification criteria observed <10% particulate coverage >60% coverage ate 'east 20 unfolded or overlapped grid squares <5% F B C V= EDS spectrum conforming to laboratory notes or opaque areas . identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite j Non-Asbestos Tremolite j M = Matrix Non-Identified i Actinolite ) f'lSD = No Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660196

NYC-WTC_000174767