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): 1824 Lab Group #: 7184 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 rttttt-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (Nonadb i No F B C M >=05 pi >=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5m ------------------------1

“2_, t/ 4 a

H

I I n Struct = > 0.5)u >5:1 Aspect Ratio Grid acceptance:

7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Fotal.s <10% particulate coverage >50% coverage ate iaboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F I B C j M j ■> 'v= EDS spectrum conforming to iaboratory holes or opaque areas identification criteria observed Clirysotile i A.MPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C : Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSC = No Structures Detected

CITY_21MC100_003102767

NYC-WTC_000183538