NYC-WTC_000227914

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1870 Lab Group #: 6764 Filter Type / Filter Area: MCE 385 mm' Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 2/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EOS i No (Nonadb ; F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No . Coord Elements) j <5m

<32:- J

Struct = > 0.5n ,> 5:1 Aspect Ratio Grid acceptance: V= PositivB diffraction pattern properties conforming to *5°^ undissol^ filter, overtop or folded Totals uu-u... ___ laboratory identificalior d observed <10% particulatB coverage >50% coverage ate critena least 20 unfolded oroveriapped grid squares <5% F B C M V= 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 Actinolite Non-Identified USD = No Structures Detected

CITY_21MC100_002899446

NYC-WTC_000227914