NYC-WTC_000219722

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1832 Lab Group #: 7163 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 2 Grid Opening Size: 0.0ri24 Client Sample #; 04 Area Examined; 0.04496 mm-

GRID BOX: Magnification; 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3,/2I/02

Analysis Performed By; MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb t No F B C >=05 p i>=5p Chrys Amphibole Nonasb Amb)g/N0 No Coord <5p Elements) i

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Struct = > O.Sp > 5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to <50% undissoived filter, ovedapped or folded Totals laboraloty identificatior criteria observed <10% partieulate coverage >50% eoverage ate least 20 unfolded or overlapped grid squares <5% F B C i M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES .Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ■Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSO = No Structures Delected

CITY_21MC100_002881536

NYC-WTC_000219722