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): 1816 Lab Group #: 6887 Kilter Type / Filter Area: .MCE 385 mm- Lab Sample #: 2l Grid Opening Size: 0.01 ’24

Client Sample #: 24 Area Examined: 1)04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: J- '2 G ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/1/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or [ EDS No —I (Nonadb F C ' M >=05 u >=5(j Chrys Amphibole [ Nonaso Ambig.'ND i \o Coord , ' Elements) ----------------------- ----------- ---------------

•''<3 1------- ■ A \----- f ’ 3' A

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

\ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped ar folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F i B i C M I \ = EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas Chrysotile —----h- .AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_003102198

NYC-WTC_000183165