NYC-WTC_000200460

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume fliters): 1840 Lab Group #: S054 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIPED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/11/02

Analysis Performed By: MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS ■ (Nonadb No F B C M >=Q5(J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

_ / VTuC

Al

T Struct = > 0.5(1 > 5:1 Aspect Ratio Gridacceptance; Positive diffraction pattern properties conforming to undissolved filter, overlapped or hided Totals . ' laboratory identification'criteria observed • <10% particulate coverage >50% coverage ate least 20 infolded or overlapped grid squares <5% F B C M 'J- EDS spectrum conforming to laborato^ holes or opaque areas ; identification criteria observed Chrysotile ~T). . ZV AMPHIBOLES Amphibole F ,= Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart CroGidolite Ambiguous ■ C = Cluster (>3 Intersections) ■ Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSO = No Structures Delected

CITY_21MC100_011274902

NYC-WTC_000200470