TEM asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEMAsbestosXairl Count Sheet Client Name: NYC BOE Volume niters): 1936 Lab Group #: 6073 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10. Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/10/01

Analysis Performed By: MARK PEYSAKHOV

30. Structure Structure Type Length ID of Structure N or N EDS No (Nonadb F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5|j Elements)

_ Z X ~ZZ1I 41----- _

I Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 7 = Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped 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 >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification enteric 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 T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O4585

NYC-WTC_000184065