NYC-WTC_000201275

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7334 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 4/5/02’ if Grid Openings: 4 Analysis Date:

Analysis Performed By: MARK FEYSAKHGV

GO. Structure PStructure Type Length ID of Structure N or 4 . EDS (Noradb No I F B ,C •M >=05 jj .>=5p_ _Chrys Amphibcle Nonasb Ambig/ND ' i No Coord - Elements) "T <5p.

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Struct = > 0.5g > 57 Aspect Ratio Grid oKeptance:

Positive diffraction pattern properties conforming to <50% indissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u A/= EOS spectrum conforming to laboratory holes or opaque areas ■ identification criteria obser/ed Chrysotile AMPHIBOLES ) Amphibole F = Single Fiber Arnosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite । Ambiguous C = Cluster l>3 Intersections) Anthophyllite Non-Asbestos Tremolite ; M = Matrix Non-Tdentified Actinolite N3D = No Structures Detected

CITY_21MC100_011275557

NYC-WTC_000201278