TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NAT BOE \ plume filters): 1920 Lab Group #: 6010 Filter Type / Filter Area: MCE 385 mm- Lab Sampie #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Anab'sis Date: 12/1/01

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or n' EDS (Nonadb No F B C M >=05 p >=51J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

3

I Struct = > 0.5p 5:1 .Aspect Ratio Grid acceptance:

•\ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ^ = EDS spectrum contorming to laboratory holes or opaque areas ideniificatior criteria observed Chrs'sotile .AMPHIBOLES Amphibole F : Single Fiber Amosite F = Sundae (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos i Tremolite W = Matrix Actinolite Non-ldentified i NSC - No Structures Detected

CITY_21MC100_003104434

NYC-WTC_000183978