TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1856 Lab Group #: 6908 Filter Type / Filter .Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/3/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M =5pi Chrys i Amphibole Nonasb Ambig/ND No Coord <5p Elements)

-I------- r ■— L- -

W-4 —i— ^—4 t----- 1

G -I----- 1----- / 1------- h

Struct = > 0 5|u >5:1 Aspect Ratio Grid acceptance:

y = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed

y = EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% i noIes or opaque areas rF B C M >5p

identification criteria observed Chrysotile ■AMPHIBOLES Amphibole । F = Single Fiber Amosite i Ambiguous ! B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Anthophyllite I--------------------- 1 C = Cluster (>3 Intersections) Non-Asbestos M = Matrix Tremolite I____ _ ____ L Actinolite Non-ldentified i NSD = No Structures Detected

CITY_21MC100_0 04204410

NYC-WTC_000183214