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): 1832 Lab Group #: 6876 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0,01124 Client Sample #: 26 Area Examined: 0,04496 mm' GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS I (Nonadb J No F : B C M >=05 p >=5p Chrys Amphibole Nonasb ] Ambig/ND No Goord <5p Elements’)

o/^ r 66 ____ - 4 I

I I

Struct = > 0,5)1 >5;1 Aspect Ratio Gric acceptance; 7= Positive diffraction pattern properties conforming to <50% undissolized filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria obsen/ed least 20 unfolded or overlapped grio squares <5% F B C M >5p 7= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite 0 = Bundle (<3 fibers <1 fiber diamerer apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite ! Non-Identified NSD = No Structures Detected

CITY_21MC100_0 03103577

NYC-WTC_000183952