TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1832 Lab Group #: 7207 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 09 Area Examined: 0.04496 mm-

GRID BOX: Mannification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Anabasis Date: 3/25/02

Analysis Performed By: ROMAN PEYSaKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS 1 (Nonadb i No F B C M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5. Elements)

6/ —

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

N= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals <10% paniculate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped gnd squares <5% j F ! B C M ) >5u 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fibe' Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersecfions) Anthophyllite Non-Asbestos f Tremolite M = Matrix Actinolite Non-Identified ■ NSD = No Structures Detected

CITY_21MC1OO_OO31O28O7

NYC-WTC_000183563