NYC-WTC_000223682

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BO.E Volume (liters): 1920 Lah Croup #: 7390 Filter Type / Filter Area: MCE 3S5 mm- Lab Sample 3 Grid Opening Size: 0.01124

Client Sample #: 03 Area Examined: 0 04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 443 02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of SirjCIure Snr 9 -Ui ,Noraab No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND I Elemeiisi No Coord <5p i f

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Struct -= > 0.5p >5:1 Aspect Ratio Gnd acceptance: 7 = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory iaentification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% T 1 F ! B ! C • M : > 9= EDS soectrum conforming to laboratory holes or opaque areas ideniification entena observed Chrysotile i A.MPHIBOLES Amphibole ) F = Single Fiber Amosite e = Bundle ;<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos Tremolite M = Matrix Actinolite i Non-Identified i NSC = No Structures Delected L.. 1

CITY_21MC100_002919745

NYC-WTC_000223682