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 #: 6943 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm'

GRID BOX: Maanification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/6/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length IC of Structure N or EDS (Nonadb , No F B C M >=05 p >=r5(J Chry^ Amphibole Nonasb Arrbig/ND No Coord <5p Elements) !

a

U4

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance

/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded T^ls <19% particulate coverage >50% coverage ate aboraton/ identification criteria obsei^ed least 20 unfoldea or overlaopeo grid squares <5% !______________ I F 1 B j C 1 M 1 >: EDS spectrum confoiming to laboratory holes orooaque areas dentirication criteria ooserved Chrysotile AMPHIBOLES Amphibole : - = S ngle Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous 1 D = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Actinolite Non-Identified ) NED = Mo Structures Delected

CITY_21MC100_003102312

NYC-WTC_000183235