NYC-WTC_000202666

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1926 Lab Group #: 5889 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 1J Area Examined: 0.04496

GRID BOX: A3 Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/14/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID cf Structure N or EDS I (Nonadb j No F 3 C M >=05 p -5p Chrys Ampnibole Nonasb Ambig/ND No Coord <.5p Elements) I

-3 < ------- i 1 -A ..-r^ i

Struct = > 0.5q > 51 Aspect Ratio Grid acceptance:

<= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded roraks <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5|J EDS spectrum conforming to laboratory holes or opaque areas Identification critena observed Cliivsotile amphiboles"' Amptubole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite i I NSC = No Structures Detected

CITY_21MC100_003275198

NYC-WTC_000202666