NYC-WTC_000223429

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6453 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 11 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: 1/26/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS - (Nonadb No F B C M >=05 u i>=5(j Chrys Amphibole Nonasb Ambig/ND No Coord <5u ElemenK)

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: . Positive diffraction pattern properties conforming to <50% undissolveci filter, overlapped'or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

'I- EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5|j

identification criteria observed Chiysotile /amphiboles Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbesros ' i Tremolite Matrix Non-Identified Actinolite NSD = .No Structures Delected

CITY_21MC100_002890636

NYC-WTC_000223429