TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1827 Lab Group #: 6823 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 2 Grid Opening Size: 0.01124

Client Sample #: 05 Area Examined: 0.04496 mm^

GRIP BOX: Magnification: 20,000 GRIDIP: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 2/25/02

Analysis Performed By: ROMAN PEYSAKHOV

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

/./ /f Zl

-I i i O i

J__ L I I I r _ ___________ I i j- I_____________ L___ Struct = > 0.5 p _> 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 gnd squares <5% F B C M >5u ■V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed 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 S Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003103477

NYC-WTC_000183903