NYC-WTC_000193411

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1904 Lab Group #: 8241 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Notn EDS (Nonaab No F B C M >=05 p-; :>=5lJ Chrys Amphibole Nonasb Ambig/ND bb Coord <5p Elemeris) I

A

Struct = > 0.5)1 >5:1 .Aspect Ratio Grid acceplaiice: Positive diffraction pattern properties conforming to <507o undif solved, l iter, overlapped or folded Totals laboratory identification criteria observed <10% pall'"Irie coverage >50% coverage ate least 20 uc ' j-ed or overlapped grid squares <5% F B cTm >5u ■/= EDS spectrum conforming to laboratory holesort,.; . eaieas identification criteria observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 liber diameter apart Crov,Oolite ' Ambiguous C = Cluster (>3 Intersections) Aiiili i.'hylliLe Non-Asbestos Trc'voiite : M = Matrix ■ Non-Identified NSD = No Structures Detected

CITY_21MC100_003094616

NYC-WTC_000193411