NYC-WTC_000201390

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters'): 1840 Lab Group #: 7388 Filter Type / Filter Area: MCE 385 mm’ Xiah Sam£le^ , 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/13/02

Analysis Performed By: WkRK peysakhov

GO. Structure structure.Type [ Length ID of Structure N or T EDS (Nonadb No F B C M i >=06 4 >=5m , Chrys Amphibole Nonasb ! AmbigfND No Coord i <5p Elements)

.|

' □ c/v,? ^<7

- I Struct = > 0.5)1 > 5:1 Aspect Ratio Grid acceptance:

y = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% oarticulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% f B C M >5(J /= EDS spectrum conforming to laboratory holes or ooaque areas icentification criteria observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amesite B = Bundle(<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ' Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSC = No Structures D.etscted

CITY_21MC100_011275691

NYC-WTC_000201395