NYC-WTC_000204703

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1928 Lab Group #: 7272 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV Grid Openings: 4 Analysis Date: 3/30/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure N or V EDS No (Nonadb F B C M >=05 M >=5(j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) ) 'rI,

is a a

Struct = > 0.5n >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria oijserved <10% particulate coverage >50% coverage ate

7= EDS spectrum conforming tc laboratory least 20 unfolded or overlapped grid squares <5% Tf bTT M ! >5iJ holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite I i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 1 j C = Cluster (>3 Intersections) Anthophyllite [ Non-Asbestos j Tremolite M = Matrix Non-Identified | Actinolite USD = No Structures Detected

CITY_21MC100_003061738

NYC-WTC_000204703