NYC-WTC_000204762

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Yame: WC BOE Volume (liters): 1920 Lab Group #: 7390 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm‘

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/13/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5p .>5:1 Aspect Ratio Grid aaeptance: 'i:: Positive diffraction pattern pro()erties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% I F B j C M I >5u x/: EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile | AMPHIBOLES Amphibole ! F :: Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ] C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified I Actinolite I______________ ___ _ I ._j NSO = No Structures Detected

CITY_21MC1OO_OO3O61868

NYC-WTC_000204762