NYC-WTC_000215530

NYC 9/11 Public Portal Document

TEM Asbestos (air) Cauat Sheet Client Name: NYC BOE Volume (liters): 1720 Lab Group #: 6831 Filter Type / Filter Area: MCE 385 mr Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: T16 Area Examined: 0.0562 mm-

GRID BOX: Magnification: 20,000 GRID ID: 3; Accelerating Voltage: too KeV # Grid Openings: 5 Analysis Date: . 2/25/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure I ype Length ID of Structure N or v EDS ■ : No (Nonadb F B C M >=05 0 >=5)j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) '

3 or

F' '-Co ?*■

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved 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 y= 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 = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC100_002872531

NYC-WTC_000215530