TEM asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 7174 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 2 Grid Opening Size: 0.01124

Client Sample #: 05 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS No {Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

_ -J A cr

i j T

I

J I Struct = > 0.5n > 5; 1 Aspect Ratio Grid acceptance: 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 overiapped grid squares <5% f F B C M >5iJ v = EDS spectrum conforming to laboratory holes or opaque areas L identification criteria observed Chrysotile AMPHIBOLES Amphibole J F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous j C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Detected

CITY_21MC100_003102728

NYC-WTC_000183508