TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1824 Lab Group #: 6843 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm-

GRID BOX: £ Magnification: 20,000 GRID ID: - Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2'27/02

.Analysis Performed By: MARK PEYSAKHOV

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

*3- 03 7

Struct = > 0.5,11 >5:1 Aspect Ratio Grid acceptance;

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

CITY_21MC100_003103528

NYC-WTC_000183918