NYC-WTC_000211953

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7335 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRipiD: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/5/02

Analysis .Performed By:_. MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 'J EDS No (Nonadb F B C M >=5p Chrys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

Struct = > 0 5q .>5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m '/= 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 Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002359604

NYC-WTC_000211953